diff --git a/src/org/mozilla/javascript/Parser.java b/src/org/mozilla/javascript/Parser.java
index 294ef915c8..12683295bd 100644
--- a/src/org/mozilla/javascript/Parser.java
+++ b/src/org/mozilla/javascript/Parser.java
@@ -738,6 +738,9 @@ private AstNode parseFunctionBody(int type, FunctionNode fnNode) throws IOExcept
                                 if (directive == null) {
                                     inDirectivePrologue = false;
                                 } else if (directive.equals("use strict")) {
+                                    if (fnNode.getDefaultParams() != null) {
+                                        reportError("msg.default.args.use.strict");
+                                    }
                                     inUseStrictDirective = true;
                                     fnNode.setInStrictMode(true);
                                     if (!savedStrictMode) {
diff --git a/src/org/mozilla/javascript/resources/Messages.properties b/src/org/mozilla/javascript/resources/Messages.properties
index 96d2dd50b1..d5d5445386 100644
--- a/src/org/mozilla/javascript/resources/Messages.properties
+++ b/src/org/mozilla/javascript/resources/Messages.properties
@@ -100,7 +100,7 @@ msg.mult.index =\
 msg.bad.for.in.destruct =\
     Left hand side of for..in loop must be an array of length 2 to accept \
     key/value pair.
-    
+
 msg.cant.convert =\
     Can''t convert to type "{0}".
 
@@ -267,7 +267,7 @@ msg.var.redecl =\
 
 msg.const.redecl =\
     TypeError: redeclaration of const {0}.
-    
+
 msg.let.redecl =\
     TypeError: redeclaration of variable {0}.
 
@@ -377,7 +377,7 @@ msg.no.semi.for =\
 
 msg.no.semi.for.cond =\
     missing ; after for-loop condition
-    
+
 msg.in.after.for.name =\
     missing in after for
 
@@ -389,7 +389,7 @@ msg.no.paren.with =\
 
 msg.no.paren.after.with =\
     missing ) after with-statement object
-    
+
 msg.no.with.strict =\
     with statements not allowed in strict mode
 
@@ -539,7 +539,7 @@ msg.no.unary.expr.on.left.exp =\
 
 # ScriptRuntime
 
-# is there a better message for this? 
+# is there a better message for this?
 # it's currently only used as a poison pill for caller, caller and arguments properties
 msg.op.not.allowed =\
     This operation is not allowed.
@@ -884,7 +884,7 @@ msg.send.newborn =\
 
 msg.already.exec.gen =\
     Already executing generator
-    
+
 msg.StopIteration.invalid =\
     StopIteration may not be changed to an arbitrary object.
 
@@ -911,6 +911,9 @@ msg.arguments.not.access.strict =\
 msg.object.cyclic.prototype =\
   Cyclic prototype "{0}" value not allowed.
 
+msg.default.args.use.strict =\
+  A function cannot have "use strict" directive with default arguments
+
 # Symbol support
 msg.object.not.symbolscriptable =\
   Object {0} does not support Symbol keys
@@ -959,4 +962,4 @@ msg.promise.capability.state =\
   Invalid promise capability state
 
 msg.promise.all.toobig =\
-  Too many inputs to Promise.all
\ No newline at end of file
+  Too many inputs to Promise.all
diff --git a/testsrc/org/mozilla/javascript/tests/DefaultParametersTest.java b/testsrc/org/mozilla/javascript/tests/DefaultParametersTest.java
index 74ed37c539..8f3677f094 100644
--- a/testsrc/org/mozilla/javascript/tests/DefaultParametersTest.java
+++ b/testsrc/org/mozilla/javascript/tests/DefaultParametersTest.java
@@ -4,6 +4,7 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import org.junit.Ignore;
 import org.junit.Test;
 import org.mozilla.javascript.Context;
 import org.mozilla.javascript.EcmaError;
@@ -44,6 +45,7 @@ public void functionDefaultArgsUsage() throws Exception {
     }
 
     @Test
+    @Ignore("temporal-dead-zone")
     public void functionDefaultArgsMultiFollowUsage() throws Exception {
         final String script =
                 "function f(a = go()) {\n"
@@ -54,14 +56,15 @@ public void functionDefaultArgsMultiFollowUsage() throws Exception {
                         + "}\n"
                         + "\n";
         assertIntEvaluates(24, script + "\nf(24)");
-        assertThrows("ReferenceError: \"go\" is not defined.", "function f() { go() }; var f1 = f()");
+        assertThrows(
+                "ReferenceError: \"go\" is not defined.", "function f() { go() }; var f1 = f()");
         assertThrows("ReferenceError: \"go\" is not defined.", script + "\nf()");
     }
 
     @Test
+    @Ignore("temporal-dead-zone")
     public void functionDefaultArgsMultiReferEarlier() throws Exception {
-        final String script =
-                "var f = function(a = b * 2, b = 3) { return a * b; }\n";
+        final String script = "var f = function(a = b * 2, b = 3) { return a * b; }\n";
         assertThrows("ReferenceError: \"b\" is not defined.", script + "\nf()");
     }
 
diff --git a/testsrc/org/mozilla/javascript/tests/FunctionTest.java b/testsrc/org/mozilla/javascript/tests/FunctionTest.java
index ed5990ffaa..6edf137ec7 100644
--- a/testsrc/org/mozilla/javascript/tests/FunctionTest.java
+++ b/testsrc/org/mozilla/javascript/tests/FunctionTest.java
@@ -5,7 +5,7 @@
 /** */
 package org.mozilla.javascript.tests;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
 
 import org.junit.Test;
 import org.mozilla.javascript.Scriptable;
diff --git a/testsrc/org/mozilla/javascript/tests/Test262SuiteTest.java b/testsrc/org/mozilla/javascript/tests/Test262SuiteTest.java
index 7ede48fc0e..86926a2144 100644
--- a/testsrc/org/mozilla/javascript/tests/Test262SuiteTest.java
+++ b/testsrc/org/mozilla/javascript/tests/Test262SuiteTest.java
@@ -103,7 +103,6 @@ public class Test262SuiteTest {
                             "class-fields-public",
                             "computed-property-names",
                             "default-arg",
-                            "default-parameters",
                             "new.target",
                             "object-rest",
                             "regexp-dotall",
diff --git a/testsrc/test262.properties b/testsrc/test262.properties
index 746148e5b7..934cada0ad 100644
--- a/testsrc/test262.properties
+++ b/testsrc/test262.properties
@@ -2460,7 +2460,7 @@ language/arguments-object 189/260 (72.69%)
     mapped/nonwritable-nonenumerable-nonconfigurable-descriptors-basic.js non-strict
     mapped/nonwritable-nonenumerable-nonconfigurable-descriptors-set-by-arguments.js non-strict
     mapped/nonwritable-nonenumerable-nonconfigurable-descriptors-set-by-param.js non-strict
-    unmapped/via-params-dflt.js
+    unmapped/via-params-dflt.js non-strict
     unmapped/via-params-dstr.js non-strict
     unmapped/via-params-rest.js non-strict
     arguments-caller.js
@@ -2731,7 +2731,7 @@ language/directive-prologue 18/62 (29.03%)
     14.1-9-s.js {non-strict: [-1]}
     func-decl-inside-func-decl-parse.js non-strict
 
-language/eval-code 259/349 (74.21%)
+language/eval-code 255/349 (73.07%)
     direct/arrow-fn-a-following-parameter-is-named-arguments-arrow-func-declare-arguments-assign.js non-strict
     direct/arrow-fn-a-following-parameter-is-named-arguments-arrow-func-declare-arguments-assign-incl-def-param-arrow-arguments.js non-strict
     direct/arrow-fn-a-preceding-parameter-is-named-arguments-arrow-func-declare-arguments-assign.js non-strict
@@ -2740,12 +2740,8 @@ language/eval-code 259/349 (74.21%)
     direct/arrow-fn-body-cntns-arguments-fn-decl-params-cntns-dflt-assignment-arrow-func-declare-arguments-assign-incl-def-param-arrow-arguments.js non-strict
     direct/arrow-fn-body-cntns-arguments-func-decl-arrow-func-declare-arguments-assign.js non-strict
     direct/arrow-fn-body-cntns-arguments-func-decl-arrow-func-declare-arguments-assign-incl-def-param-arrow-arguments.js non-strict
-    direct/arrow-fn-body-cntns-arguments-lex-bind-arrow-func-declare-arguments-assign.js non-strict
     direct/arrow-fn-body-cntns-arguments-lex-bind-arrow-func-declare-arguments-assign-incl-def-param-arrow-arguments.js non-strict
-    direct/arrow-fn-body-cntns-arguments-var-bind-arrow-func-declare-arguments-assign.js non-strict
     direct/arrow-fn-body-cntns-arguments-var-bind-arrow-func-declare-arguments-assign-incl-def-param-arrow-arguments.js non-strict
-    direct/arrow-fn-no-pre-existing-arguments-bindings-are-present-arrow-func-declare-arguments-assign.js non-strict
-    direct/arrow-fn-no-pre-existing-arguments-bindings-are-present-arrow-func-declare-arguments-assign-incl-def-param-arrow-arguments.js non-strict
     direct/async-func-decl-a-following-parameter-is-named-arguments-declare-arguments.js {unsupported: [async]}
     direct/async-func-decl-a-following-parameter-is-named-arguments-declare-arguments-and-assign.js {unsupported: [async]}
     direct/async-func-decl-a-preceding-parameter-is-named-arguments-declare-arguments.js {unsupported: [async]}
@@ -3005,7 +3001,7 @@ language/expressions/addition 9/48 (18.75%)
     get-symbol-to-prim-err.js
     order-of-evaluation.js
 
-language/expressions/arrow-function 209/333 (62.76%)
+language/expressions/arrow-function 193/333 (57.96%)
     dstr/ary-init-iter-close.js
     dstr/ary-init-iter-get-err.js
     dstr/ary-init-iter-get-err-array-prototype.js
@@ -3050,99 +3046,93 @@ language/expressions/arrow-function 209/333 (62.76%)
     dstr/ary-ptrn-rest-id-iter-val-err.js
     dstr/ary-ptrn-rest-obj-id.js
     dstr/ary-ptrn-rest-obj-prop-id.js
-    dstr/dflt-ary-init-iter-close.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-get-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-get-err-array-prototype.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-no-close.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-name-iter-val.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elem-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elem-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elision-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elision-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-empty-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-empty-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-rest-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-rest-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-val-null.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-hole.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-complete.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-done.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-val-null.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-val-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-empty.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-elem.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-empty.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-rest.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-direct.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-elision-next-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-iter-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-iter-val-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-init-ary.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-init-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-init-obj.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-not-final-ary.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-not-final-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-not-final-obj.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-obj-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-obj-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-init-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-init-undefined.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-empty.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-get-value-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-class.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-cover.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-fn.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-gen.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-list-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-value-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-eval-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-get-value-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-value-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-value-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-rest-getter.js {unsupported: [default-parameters, object-rest]}
-    dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js {unsupported: [default-parameters, object-rest]}
-    dstr/dflt-obj-ptrn-rest-val-obj.js {unsupported: [default-parameters, object-rest]}
+    dstr/dflt-ary-init-iter-close.js
+    dstr/dflt-ary-init-iter-get-err.js
+    dstr/dflt-ary-init-iter-get-err-array-prototype.js
+    dstr/dflt-ary-init-iter-no-close.js
+    dstr/dflt-ary-name-iter-val.js
+    dstr/dflt-ary-ptrn-elem-ary-elem-init.js
+    dstr/dflt-ary-ptrn-elem-ary-elem-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-elision-init.js
+    dstr/dflt-ary-ptrn-elem-ary-elision-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-empty-init.js
+    dstr/dflt-ary-ptrn-elem-ary-empty-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-rest-init.js
+    dstr/dflt-ary-ptrn-elem-ary-rest-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-val-null.js
+    dstr/dflt-ary-ptrn-elem-id-init-exhausted.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js
+    dstr/dflt-ary-ptrn-elem-id-init-hole.js
+    dstr/dflt-ary-ptrn-elem-id-init-skipped.js
+    dstr/dflt-ary-ptrn-elem-id-init-throws.js
+    dstr/dflt-ary-ptrn-elem-id-init-undef.js
+    dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js
+    dstr/dflt-ary-ptrn-elem-id-iter-complete.js
+    dstr/dflt-ary-ptrn-elem-id-iter-done.js
+    dstr/dflt-ary-ptrn-elem-id-iter-step-err.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val-err.js
+    dstr/dflt-ary-ptrn-elem-obj-id.js
+    dstr/dflt-ary-ptrn-elem-obj-id-init.js
+    dstr/dflt-ary-ptrn-elem-obj-prop-id.js
+    dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js
+    dstr/dflt-ary-ptrn-elem-obj-val-null.js
+    dstr/dflt-ary-ptrn-elem-obj-val-undef.js
+    dstr/dflt-ary-ptrn-elision.js
+    dstr/dflt-ary-ptrn-elision-exhausted.js
+    dstr/dflt-ary-ptrn-elision-step-err.js
+    dstr/dflt-ary-ptrn-empty.js
+    dstr/dflt-ary-ptrn-rest-ary-elem.js
+    dstr/dflt-ary-ptrn-rest-ary-elision.js
+    dstr/dflt-ary-ptrn-rest-ary-empty.js
+    dstr/dflt-ary-ptrn-rest-ary-rest.js
+    dstr/dflt-ary-ptrn-rest-id.js
+    dstr/dflt-ary-ptrn-rest-id-direct.js
+    dstr/dflt-ary-ptrn-rest-id-elision.js
+    dstr/dflt-ary-ptrn-rest-id-elision-next-err.js
+    dstr/dflt-ary-ptrn-rest-id-exhausted.js
+    dstr/dflt-ary-ptrn-rest-id-iter-step-err.js
+    dstr/dflt-ary-ptrn-rest-id-iter-val-err.js
+    dstr/dflt-ary-ptrn-rest-obj-id.js
+    dstr/dflt-ary-ptrn-rest-obj-prop-id.js
+    dstr/dflt-obj-init-null.js
+    dstr/dflt-obj-init-undefined.js
+    dstr/dflt-obj-ptrn-empty.js
+    dstr/dflt-obj-ptrn-id-get-value-err.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-class.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-cover.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-fn.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-gen.js
+    dstr/dflt-obj-ptrn-id-init-skipped.js
+    dstr/dflt-obj-ptrn-id-init-throws.js
+    dstr/dflt-obj-ptrn-id-init-unresolvable.js
+    dstr/dflt-obj-ptrn-id-trailing-comma.js
+    dstr/dflt-obj-ptrn-list-err.js
+    dstr/dflt-obj-ptrn-prop-ary.js
+    dstr/dflt-obj-ptrn-prop-ary-init.js
+    dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js
+    dstr/dflt-obj-ptrn-prop-ary-value-null.js
+    dstr/dflt-obj-ptrn-prop-eval-err.js
+    dstr/dflt-obj-ptrn-prop-id.js
+    dstr/dflt-obj-ptrn-prop-id-get-value-err.js
+    dstr/dflt-obj-ptrn-prop-id-init.js
+    dstr/dflt-obj-ptrn-prop-id-init-skipped.js
+    dstr/dflt-obj-ptrn-prop-id-init-throws.js
+    dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js
+    dstr/dflt-obj-ptrn-prop-id-trailing-comma.js
+    dstr/dflt-obj-ptrn-prop-obj.js
+    dstr/dflt-obj-ptrn-prop-obj-init.js
+    dstr/dflt-obj-ptrn-prop-obj-value-null.js
+    dstr/dflt-obj-ptrn-prop-obj-value-undef.js
+    dstr/dflt-obj-ptrn-rest-getter.js {unsupported: [object-rest]}
+    dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js {unsupported: [object-rest]}
+    dstr/dflt-obj-ptrn-rest-val-obj.js {unsupported: [object-rest]}
     dstr/obj-init-null.js
     dstr/obj-init-undefined.js
     dstr/obj-ptrn-id-init-fn-name-arrow.js
@@ -3180,23 +3170,17 @@ language/expressions/arrow-function 209/333 (62.76%)
     syntax/arrowparameters-bindingidentifier-yield.js non-strict
     syntax/arrowparameters-cover-formalparameters-yield.js non-strict
     syntax/arrowparameters-cover-includes-rest-concisebody-functionbody.js
-    syntax/arrowparameters-cover-initialize-1.js
     syntax/arrowparameters-cover-initialize-2.js
     syntax/arrowparameters-cover-rest-concisebody-functionbody.js
     syntax/arrowparameters-cover-rest-lineterminator-concisebody-functionbody.js
     array-destructuring-param-strict-body.js
     ArrowFunction_restricted-properties.js
-    dflt-params-abrupt.js {unsupported: [default-parameters]}
-    dflt-params-arg-val-not-undefined.js {unsupported: [default-parameters]}
-    dflt-params-arg-val-undefined.js {unsupported: [default-parameters]}
-    dflt-params-duplicates.js {unsupported: [default-parameters]}
-    dflt-params-ref-later.js {unsupported: [default-parameters]}
-    dflt-params-ref-prior.js {unsupported: [default-parameters]}
-    dflt-params-ref-self.js {unsupported: [default-parameters]}
-    dflt-params-rest.js {unsupported: [default-parameters]}
+    dflt-params-duplicates.js non-strict
+    dflt-params-ref-later.js
+    dflt-params-ref-self.js
     dflt-params-trailing-comma.js
-    eval-var-scope-syntax-err.js {unsupported: [default-parameters]}
-    length-dflt.js {unsupported: [default-parameters]}
+    eval-var-scope-syntax-err.js non-strict
+    length-dflt.js
     lexical-new.target.js {unsupported: [new.target]}
     lexical-new.target-closure-returned.js {unsupported: [new.target]}
     lexical-super-call-from-within-constructor.js
@@ -3204,16 +3188,12 @@ language/expressions/arrow-function 209/333 (62.76%)
     lexical-super-property-from-within-constructor.js
     lexical-supercall-from-immediately-invoked-arrow.js
     object-destructuring-param-strict-body.js
-    param-dflt-yield-expr.js {unsupported: [default-parameters]}
-    param-dflt-yield-id-non-strict.js {unsupported: [default-parameters]}
-    param-dflt-yield-id-strict.js {unsupported: [default-parameters]}
+    param-dflt-yield-expr.js
+    param-dflt-yield-id-non-strict.js non-strict
     params-duplicate.js non-strict
     scope-body-lex-distinct.js non-strict
-    scope-param-elem-var-close.js non-strict
-    scope-param-elem-var-open.js non-strict
     scope-param-rest-elem-var-close.js non-strict
     scope-param-rest-elem-var-open.js non-strict
-    scope-paramsbody-var-close.js
     scope-paramsbody-var-open.js
 
 language/expressions/bitwise-and 5/30 (16.67%)
@@ -3436,7 +3416,7 @@ language/expressions/exponentiation 4/44 (9.09%)
     bigint-wrapped-values.js {unsupported: [computed-property-names]}
     order-of-evaluation.js
 
-language/expressions/function 203/248 (81.85%)
+language/expressions/function 189/248 (76.21%)
     dstr/ary-init-iter-close.js
     dstr/ary-init-iter-get-err.js
     dstr/ary-init-iter-get-err-array-prototype.js
@@ -3481,99 +3461,93 @@ language/expressions/function 203/248 (81.85%)
     dstr/ary-ptrn-rest-id-iter-val-err.js
     dstr/ary-ptrn-rest-obj-id.js
     dstr/ary-ptrn-rest-obj-prop-id.js
-    dstr/dflt-ary-init-iter-close.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-get-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-get-err-array-prototype.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-no-close.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-name-iter-val.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elem-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elem-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elision-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elision-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-empty-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-empty-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-rest-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-rest-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-val-null.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-hole.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-complete.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-done.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-val-null.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-val-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-empty.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-elem.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-empty.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-rest.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-direct.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-elision-next-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-iter-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-iter-val-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-init-ary.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-init-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-init-obj.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-not-final-ary.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-not-final-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-not-final-obj.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-obj-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-obj-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-init-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-init-undefined.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-empty.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-get-value-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-class.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-cover.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-fn.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-gen.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-list-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-value-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-eval-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-get-value-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-value-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-value-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-rest-getter.js {unsupported: [default-parameters, object-rest]}
-    dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js {unsupported: [default-parameters, object-rest]}
-    dstr/dflt-obj-ptrn-rest-val-obj.js {unsupported: [default-parameters, object-rest]}
+    dstr/dflt-ary-init-iter-close.js
+    dstr/dflt-ary-init-iter-get-err.js
+    dstr/dflt-ary-init-iter-get-err-array-prototype.js
+    dstr/dflt-ary-init-iter-no-close.js
+    dstr/dflt-ary-name-iter-val.js
+    dstr/dflt-ary-ptrn-elem-ary-elem-init.js
+    dstr/dflt-ary-ptrn-elem-ary-elem-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-elision-init.js
+    dstr/dflt-ary-ptrn-elem-ary-elision-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-empty-init.js
+    dstr/dflt-ary-ptrn-elem-ary-empty-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-rest-init.js
+    dstr/dflt-ary-ptrn-elem-ary-rest-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-val-null.js
+    dstr/dflt-ary-ptrn-elem-id-init-exhausted.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js
+    dstr/dflt-ary-ptrn-elem-id-init-hole.js
+    dstr/dflt-ary-ptrn-elem-id-init-skipped.js
+    dstr/dflt-ary-ptrn-elem-id-init-throws.js
+    dstr/dflt-ary-ptrn-elem-id-init-undef.js
+    dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js
+    dstr/dflt-ary-ptrn-elem-id-iter-complete.js
+    dstr/dflt-ary-ptrn-elem-id-iter-done.js
+    dstr/dflt-ary-ptrn-elem-id-iter-step-err.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val-err.js
+    dstr/dflt-ary-ptrn-elem-obj-id.js
+    dstr/dflt-ary-ptrn-elem-obj-id-init.js
+    dstr/dflt-ary-ptrn-elem-obj-prop-id.js
+    dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js
+    dstr/dflt-ary-ptrn-elem-obj-val-null.js
+    dstr/dflt-ary-ptrn-elem-obj-val-undef.js
+    dstr/dflt-ary-ptrn-elision.js
+    dstr/dflt-ary-ptrn-elision-exhausted.js
+    dstr/dflt-ary-ptrn-elision-step-err.js
+    dstr/dflt-ary-ptrn-empty.js
+    dstr/dflt-ary-ptrn-rest-ary-elem.js
+    dstr/dflt-ary-ptrn-rest-ary-elision.js
+    dstr/dflt-ary-ptrn-rest-ary-empty.js
+    dstr/dflt-ary-ptrn-rest-ary-rest.js
+    dstr/dflt-ary-ptrn-rest-id.js
+    dstr/dflt-ary-ptrn-rest-id-direct.js
+    dstr/dflt-ary-ptrn-rest-id-elision.js
+    dstr/dflt-ary-ptrn-rest-id-elision-next-err.js
+    dstr/dflt-ary-ptrn-rest-id-exhausted.js
+    dstr/dflt-ary-ptrn-rest-id-iter-step-err.js
+    dstr/dflt-ary-ptrn-rest-id-iter-val-err.js
+    dstr/dflt-ary-ptrn-rest-obj-id.js
+    dstr/dflt-ary-ptrn-rest-obj-prop-id.js
+    dstr/dflt-obj-init-null.js
+    dstr/dflt-obj-init-undefined.js
+    dstr/dflt-obj-ptrn-empty.js
+    dstr/dflt-obj-ptrn-id-get-value-err.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-class.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-cover.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-fn.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-gen.js
+    dstr/dflt-obj-ptrn-id-init-skipped.js
+    dstr/dflt-obj-ptrn-id-init-throws.js
+    dstr/dflt-obj-ptrn-id-init-unresolvable.js
+    dstr/dflt-obj-ptrn-id-trailing-comma.js
+    dstr/dflt-obj-ptrn-list-err.js
+    dstr/dflt-obj-ptrn-prop-ary.js
+    dstr/dflt-obj-ptrn-prop-ary-init.js
+    dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js
+    dstr/dflt-obj-ptrn-prop-ary-value-null.js
+    dstr/dflt-obj-ptrn-prop-eval-err.js
+    dstr/dflt-obj-ptrn-prop-id.js
+    dstr/dflt-obj-ptrn-prop-id-get-value-err.js
+    dstr/dflt-obj-ptrn-prop-id-init.js
+    dstr/dflt-obj-ptrn-prop-id-init-skipped.js
+    dstr/dflt-obj-ptrn-prop-id-init-throws.js
+    dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js
+    dstr/dflt-obj-ptrn-prop-id-trailing-comma.js
+    dstr/dflt-obj-ptrn-prop-obj.js
+    dstr/dflt-obj-ptrn-prop-obj-init.js
+    dstr/dflt-obj-ptrn-prop-obj-value-null.js
+    dstr/dflt-obj-ptrn-prop-obj-value-undef.js
+    dstr/dflt-obj-ptrn-rest-getter.js {unsupported: [object-rest]}
+    dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js {unsupported: [object-rest]}
+    dstr/dflt-obj-ptrn-rest-val-obj.js {unsupported: [object-rest]}
     dstr/obj-init-null.js
     dstr/obj-init-undefined.js
     dstr/obj-ptrn-id-init-fn-name-arrow.js
@@ -3605,40 +3579,32 @@ language/expressions/function 203/248 (81.85%)
     arguments-with-arguments-fn.js non-strict
     arguments-with-arguments-lex.js non-strict
     array-destructuring-param-strict-body.js
-    dflt-params-abrupt.js {unsupported: [default-parameters]}
-    dflt-params-arg-val-not-undefined.js {unsupported: [default-parameters]}
-    dflt-params-arg-val-undefined.js {unsupported: [default-parameters]}
-    dflt-params-duplicates.js {unsupported: [default-parameters]}
-    dflt-params-ref-later.js {unsupported: [default-parameters]}
-    dflt-params-ref-prior.js {unsupported: [default-parameters]}
-    dflt-params-ref-self.js {unsupported: [default-parameters]}
-    dflt-params-rest.js {unsupported: [default-parameters]}
+    dflt-params-duplicates.js non-strict
+    dflt-params-ref-later.js
+    dflt-params-ref-self.js
+    dflt-params-rest.js
     dflt-params-trailing-comma.js
-    eval-var-scope-syntax-err.js {unsupported: [default-parameters]}
-    length-dflt.js {unsupported: [default-parameters]}
+    eval-var-scope-syntax-err.js non-strict
+    length-dflt.js
     name-arguments-strict-body.js non-strict
     name-eval-strict-body.js non-strict
     object-destructuring-param-strict-body.js
-    param-dflt-yield-non-strict.js {unsupported: [default-parameters]}
-    param-dflt-yield-strict.js {unsupported: [default-parameters]}
+    param-dflt-yield-non-strict.js non-strict
+    param-dflt-yield-strict.js strict
     param-duplicated-strict-body-1.js non-strict
     param-duplicated-strict-body-2.js non-strict
     param-duplicated-strict-body-3.js non-strict
     param-eval-strict-body.js non-strict
-    params-dflt-args-unmapped.js {unsupported: [default-parameters]}
-    params-dflt-ref-arguments.js {unsupported: [default-parameters]}
+    params-dflt-ref-arguments.js
     rest-param-strict-body.js
     scope-body-lex-distinct.js non-strict
     scope-name-var-open-non-strict.js non-strict
     scope-name-var-open-strict.js strict
-    scope-param-elem-var-close.js non-strict
-    scope-param-elem-var-open.js non-strict
     scope-param-rest-elem-var-close.js non-strict
     scope-param-rest-elem-var-open.js non-strict
-    scope-paramsbody-var-close.js
     scope-paramsbody-var-open.js
 
-language/expressions/generators 227/275 (82.55%)
+language/expressions/generators 215/275 (78.18%)
     dstr/ary-init-iter-close.js
     dstr/ary-init-iter-get-err.js
     dstr/ary-init-iter-get-err-array-prototype.js
@@ -3689,99 +3655,93 @@ language/expressions/generators 227/275 (82.55%)
     dstr/ary-ptrn-rest-id-iter-val-err.js
     dstr/ary-ptrn-rest-obj-id.js
     dstr/ary-ptrn-rest-obj-prop-id.js
-    dstr/dflt-ary-init-iter-close.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-get-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-get-err-array-prototype.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-no-close.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-name-iter-val.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elem-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elem-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elision-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elision-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-empty-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-empty-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-rest-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-rest-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-val-null.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-hole.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-complete.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-done.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-val-null.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-val-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-empty.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-elem.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-empty.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-rest.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-direct.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-elision-next-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-iter-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-iter-val-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-init-ary.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-init-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-init-obj.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-not-final-ary.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-not-final-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-not-final-obj.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-obj-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-obj-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-init-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-init-undefined.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-empty.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-get-value-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-class.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-cover.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-fn.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-gen.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-list-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-value-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-eval-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-get-value-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-value-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-value-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-rest-getter.js {unsupported: [default-parameters, object-rest]}
-    dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js {unsupported: [default-parameters, object-rest]}
-    dstr/dflt-obj-ptrn-rest-val-obj.js {unsupported: [default-parameters, object-rest]}
+    dstr/dflt-ary-init-iter-close.js
+    dstr/dflt-ary-init-iter-get-err.js
+    dstr/dflt-ary-init-iter-get-err-array-prototype.js
+    dstr/dflt-ary-init-iter-no-close.js
+    dstr/dflt-ary-name-iter-val.js
+    dstr/dflt-ary-ptrn-elem-ary-elem-init.js
+    dstr/dflt-ary-ptrn-elem-ary-elem-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-elision-init.js
+    dstr/dflt-ary-ptrn-elem-ary-elision-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-empty-init.js
+    dstr/dflt-ary-ptrn-elem-ary-empty-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-rest-init.js
+    dstr/dflt-ary-ptrn-elem-ary-rest-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-val-null.js
+    dstr/dflt-ary-ptrn-elem-id-init-exhausted.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js
+    dstr/dflt-ary-ptrn-elem-id-init-hole.js
+    dstr/dflt-ary-ptrn-elem-id-init-skipped.js
+    dstr/dflt-ary-ptrn-elem-id-init-throws.js
+    dstr/dflt-ary-ptrn-elem-id-init-undef.js
+    dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js
+    dstr/dflt-ary-ptrn-elem-id-iter-complete.js
+    dstr/dflt-ary-ptrn-elem-id-iter-done.js
+    dstr/dflt-ary-ptrn-elem-id-iter-step-err.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val-err.js
+    dstr/dflt-ary-ptrn-elem-obj-id.js
+    dstr/dflt-ary-ptrn-elem-obj-id-init.js
+    dstr/dflt-ary-ptrn-elem-obj-prop-id.js
+    dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js
+    dstr/dflt-ary-ptrn-elem-obj-val-null.js
+    dstr/dflt-ary-ptrn-elem-obj-val-undef.js
+    dstr/dflt-ary-ptrn-elision.js
+    dstr/dflt-ary-ptrn-elision-exhausted.js
+    dstr/dflt-ary-ptrn-elision-step-err.js
+    dstr/dflt-ary-ptrn-empty.js
+    dstr/dflt-ary-ptrn-rest-ary-elem.js
+    dstr/dflt-ary-ptrn-rest-ary-elision.js
+    dstr/dflt-ary-ptrn-rest-ary-empty.js
+    dstr/dflt-ary-ptrn-rest-ary-rest.js
+    dstr/dflt-ary-ptrn-rest-id.js
+    dstr/dflt-ary-ptrn-rest-id-direct.js
+    dstr/dflt-ary-ptrn-rest-id-elision.js
+    dstr/dflt-ary-ptrn-rest-id-elision-next-err.js
+    dstr/dflt-ary-ptrn-rest-id-exhausted.js
+    dstr/dflt-ary-ptrn-rest-id-iter-step-err.js
+    dstr/dflt-ary-ptrn-rest-id-iter-val-err.js
+    dstr/dflt-ary-ptrn-rest-obj-id.js
+    dstr/dflt-ary-ptrn-rest-obj-prop-id.js
+    dstr/dflt-obj-init-null.js
+    dstr/dflt-obj-init-undefined.js
+    dstr/dflt-obj-ptrn-empty.js
+    dstr/dflt-obj-ptrn-id-get-value-err.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-class.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-cover.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-fn.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-gen.js
+    dstr/dflt-obj-ptrn-id-init-skipped.js
+    dstr/dflt-obj-ptrn-id-init-throws.js
+    dstr/dflt-obj-ptrn-id-init-unresolvable.js
+    dstr/dflt-obj-ptrn-id-trailing-comma.js
+    dstr/dflt-obj-ptrn-list-err.js
+    dstr/dflt-obj-ptrn-prop-ary.js
+    dstr/dflt-obj-ptrn-prop-ary-init.js
+    dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js
+    dstr/dflt-obj-ptrn-prop-ary-value-null.js
+    dstr/dflt-obj-ptrn-prop-eval-err.js
+    dstr/dflt-obj-ptrn-prop-id.js
+    dstr/dflt-obj-ptrn-prop-id-get-value-err.js
+    dstr/dflt-obj-ptrn-prop-id-init.js
+    dstr/dflt-obj-ptrn-prop-id-init-skipped.js
+    dstr/dflt-obj-ptrn-prop-id-init-throws.js
+    dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js
+    dstr/dflt-obj-ptrn-prop-id-trailing-comma.js
+    dstr/dflt-obj-ptrn-prop-obj.js
+    dstr/dflt-obj-ptrn-prop-obj-init.js
+    dstr/dflt-obj-ptrn-prop-obj-value-null.js
+    dstr/dflt-obj-ptrn-prop-obj-value-undef.js
+    dstr/dflt-obj-ptrn-rest-getter.js {unsupported: [object-rest]}
+    dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js {unsupported: [object-rest]}
+    dstr/dflt-obj-ptrn-rest-val-obj.js {unsupported: [object-rest]}
     dstr/obj-init-null.js
     dstr/obj-init-undefined.js
     dstr/obj-ptrn-id-get-value-err.js
@@ -3816,31 +3776,28 @@ language/expressions/generators 227/275 (82.55%)
     arguments-with-arguments-lex.js non-strict
     array-destructuring-param-strict-body.js
     default-proto.js
-    dflt-params-abrupt.js {unsupported: [default-parameters]}
-    dflt-params-arg-val-not-undefined.js {unsupported: [default-parameters]}
-    dflt-params-arg-val-undefined.js {unsupported: [default-parameters]}
-    dflt-params-duplicates.js {unsupported: [default-parameters]}
-    dflt-params-ref-later.js {unsupported: [default-parameters]}
-    dflt-params-ref-prior.js {unsupported: [default-parameters]}
-    dflt-params-ref-self.js {unsupported: [default-parameters]}
-    dflt-params-rest.js {unsupported: [default-parameters]}
+    dflt-params-abrupt.js
+    dflt-params-arg-val-not-undefined.js non-interpreted
+    dflt-params-arg-val-undefined.js non-interpreted
+    dflt-params-duplicates.js non-strict
+    dflt-params-ref-later.js
+    dflt-params-ref-prior.js non-interpreted
+    dflt-params-ref-self.js
+    dflt-params-rest.js
     dflt-params-trailing-comma.js
     eval-body-proto-realm.js
-    eval-var-scope-syntax-err.js {unsupported: [default-parameters]}
-    generator-created-after-decl-inst.js
+    eval-var-scope-syntax-err.js non-strict
     has-instance.js
     implicit-name.js
     invoke-as-constructor.js
-    length-dflt.js {unsupported: [default-parameters]}
+    length-dflt.js
     named-yield-identifier-non-strict.js non-strict
     named-yield-identifier-spread-non-strict.js non-strict
     named-yield-spread-arr-multiple.js
     named-yield-spread-arr-single.js
     named-yield-spread-obj.js
     object-destructuring-param-strict-body.js
-    param-dflt-yield.js {unsupported: [default-parameters]}
-    params-dflt-args-unmapped.js {unsupported: [default-parameters]}
-    params-dflt-ref-arguments.js {unsupported: [default-parameters]}
+    params-dflt-ref-arguments.js
     params-trailing-comma-multiple.js non-interpreted
     params-trailing-comma-single.js non-interpreted
     prototype-own-properties.js
@@ -3851,11 +3808,8 @@ language/expressions/generators 227/275 (82.55%)
     scope-name-var-close.js non-interpreted
     scope-name-var-open-non-strict.js non-strict
     scope-name-var-open-strict.js strict
-    scope-param-elem-var-close.js non-strict
-    scope-param-elem-var-open.js non-strict
     scope-param-rest-elem-var-close.js non-strict
     scope-param-rest-elem-var-open.js non-strict
-    scope-paramsbody-var-close.js
     scope-paramsbody-var-open.js
     yield-as-function-expression-binding-identifier.js non-strict
     yield-as-identifier-in-nested-function.js non-strict
@@ -3921,7 +3875,7 @@ language/expressions/multiplication 4/40 (10.0%)
     bigint-wrapped-values.js {unsupported: [computed-property-names]}
     order-of-evaluation.js
 
-language/expressions/object 836/1081 (77.34%)
+language/expressions/object 813/1081 (75.21%)
     dstr/async-gen-meth-ary-init-iter-close.js {unsupported: [async-iteration, async]}
     dstr/async-gen-meth-ary-init-iter-get-err.js {unsupported: [async-iteration]}
     dstr/async-gen-meth-ary-init-iter-get-err-array-prototype.js {unsupported: [async-iteration]}
@@ -4162,99 +4116,93 @@ language/expressions/object 836/1081 (77.34%)
     dstr/gen-meth-ary-ptrn-rest-id-iter-val-err.js
     dstr/gen-meth-ary-ptrn-rest-obj-id.js
     dstr/gen-meth-ary-ptrn-rest-obj-prop-id.js
-    dstr/gen-meth-dflt-ary-init-iter-close.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-init-iter-get-err.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-init-iter-get-err-array-prototype.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-init-iter-no-close.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-name-iter-val.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-ary-elem-init.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-ary-elem-iter.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-ary-elision-init.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-ary-elision-iter.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-ary-empty-init.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-ary-empty-iter.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-ary-rest-init.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-ary-rest-iter.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-ary-val-null.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-exhausted.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-arrow.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-class.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-cover.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-fn.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-gen.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-hole.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-undef.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-complete.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-done.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-step-err.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-val.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-val-array-prototype.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-val-err.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-obj-id.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-obj-id-init.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-obj-prop-id.js {unsupported: [default-parameters]}
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-    dstr/gen-meth-dflt-ary-ptrn-elem-obj-val-null.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-elem-obj-val-undef.js {unsupported: [default-parameters]}
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-    dstr/gen-meth-dflt-ary-ptrn-elision-step-err.js {unsupported: [default-parameters]}
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-    dstr/gen-meth-dflt-ary-ptrn-rest-ary-elem.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-rest-ary-elision.js {unsupported: [default-parameters]}
-    dstr/gen-meth-dflt-ary-ptrn-rest-ary-empty.js {unsupported: [default-parameters]}
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+    dstr/gen-meth-dflt-ary-init-iter-close.js
+    dstr/gen-meth-dflt-ary-init-iter-get-err.js
+    dstr/gen-meth-dflt-ary-init-iter-get-err-array-prototype.js
+    dstr/gen-meth-dflt-ary-init-iter-no-close.js
+    dstr/gen-meth-dflt-ary-name-iter-val.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-ary-elem-init.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-ary-elem-iter.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-ary-elision-init.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-ary-elision-iter.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-ary-empty-init.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-ary-empty-iter.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-ary-rest-init.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-ary-rest-iter.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-ary-val-null.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-exhausted.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-arrow.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-class.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-cover.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-fn.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-gen.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-hole.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-skipped.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-throws.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-undef.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-init-unresolvable.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-complete.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-done.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-step-err.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-val.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-val-array-prototype.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-id-iter-val-err.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-obj-id.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-obj-id-init.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-obj-prop-id.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-obj-prop-id-init.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-obj-val-null.js
+    dstr/gen-meth-dflt-ary-ptrn-elem-obj-val-undef.js
+    dstr/gen-meth-dflt-ary-ptrn-elision.js
+    dstr/gen-meth-dflt-ary-ptrn-elision-exhausted.js
+    dstr/gen-meth-dflt-ary-ptrn-elision-step-err.js
+    dstr/gen-meth-dflt-ary-ptrn-empty.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-ary-elem.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-ary-elision.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-ary-empty.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-ary-rest.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-id.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-id-direct.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-id-elision.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-id-elision-next-err.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-id-exhausted.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-id-iter-step-err.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-id-iter-val-err.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-obj-id.js
+    dstr/gen-meth-dflt-ary-ptrn-rest-obj-prop-id.js
+    dstr/gen-meth-dflt-obj-init-null.js
+    dstr/gen-meth-dflt-obj-init-undefined.js
+    dstr/gen-meth-dflt-obj-ptrn-empty.js
+    dstr/gen-meth-dflt-obj-ptrn-id-get-value-err.js
+    dstr/gen-meth-dflt-obj-ptrn-id-init-fn-name-arrow.js
+    dstr/gen-meth-dflt-obj-ptrn-id-init-fn-name-class.js
+    dstr/gen-meth-dflt-obj-ptrn-id-init-fn-name-cover.js
+    dstr/gen-meth-dflt-obj-ptrn-id-init-fn-name-fn.js
+    dstr/gen-meth-dflt-obj-ptrn-id-init-fn-name-gen.js
+    dstr/gen-meth-dflt-obj-ptrn-id-init-skipped.js
+    dstr/gen-meth-dflt-obj-ptrn-id-init-throws.js
+    dstr/gen-meth-dflt-obj-ptrn-id-init-unresolvable.js
+    dstr/gen-meth-dflt-obj-ptrn-id-trailing-comma.js
+    dstr/gen-meth-dflt-obj-ptrn-list-err.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-ary.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-ary-init.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-ary-trailing-comma.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-ary-value-null.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-eval-err.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-id.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-id-get-value-err.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-id-init.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-id-init-skipped.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-id-init-throws.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-id-init-unresolvable.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-id-trailing-comma.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-obj.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-obj-init.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-obj-value-null.js
+    dstr/gen-meth-dflt-obj-ptrn-prop-obj-value-undef.js
+    dstr/gen-meth-dflt-obj-ptrn-rest-getter.js {unsupported: [object-rest]}
+    dstr/gen-meth-dflt-obj-ptrn-rest-skip-non-enumerable.js {unsupported: [object-rest]}
+    dstr/gen-meth-dflt-obj-ptrn-rest-val-obj.js {unsupported: [object-rest]}
     dstr/gen-meth-obj-init-null.js
     dstr/gen-meth-obj-init-undefined.js
     dstr/gen-meth-obj-ptrn-empty.js
@@ -4332,99 +4280,93 @@ language/expressions/object 836/1081 (77.34%)
     dstr/meth-ary-ptrn-rest-id-iter-val-err.js
     dstr/meth-ary-ptrn-rest-obj-id.js
     dstr/meth-ary-ptrn-rest-obj-prop-id.js
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+    dstr/meth-dflt-ary-init-iter-no-close.js
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+    dstr/meth-dflt-ary-ptrn-elem-ary-elem-init.js
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+    dstr/meth-dflt-ary-ptrn-elem-ary-rest-init.js
+    dstr/meth-dflt-ary-ptrn-elem-ary-rest-iter.js
+    dstr/meth-dflt-ary-ptrn-elem-ary-val-null.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-exhausted.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-fn-name-arrow.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-fn-name-class.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-fn-name-cover.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-fn-name-fn.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-fn-name-gen.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-hole.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-skipped.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-throws.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-undef.js
+    dstr/meth-dflt-ary-ptrn-elem-id-init-unresolvable.js
+    dstr/meth-dflt-ary-ptrn-elem-id-iter-complete.js
+    dstr/meth-dflt-ary-ptrn-elem-id-iter-done.js
+    dstr/meth-dflt-ary-ptrn-elem-id-iter-step-err.js
+    dstr/meth-dflt-ary-ptrn-elem-id-iter-val.js
+    dstr/meth-dflt-ary-ptrn-elem-id-iter-val-array-prototype.js
+    dstr/meth-dflt-ary-ptrn-elem-id-iter-val-err.js
+    dstr/meth-dflt-ary-ptrn-elem-obj-id.js
+    dstr/meth-dflt-ary-ptrn-elem-obj-id-init.js
+    dstr/meth-dflt-ary-ptrn-elem-obj-prop-id.js
+    dstr/meth-dflt-ary-ptrn-elem-obj-prop-id-init.js
+    dstr/meth-dflt-ary-ptrn-elem-obj-val-null.js
+    dstr/meth-dflt-ary-ptrn-elem-obj-val-undef.js
+    dstr/meth-dflt-ary-ptrn-elision.js
+    dstr/meth-dflt-ary-ptrn-elision-exhausted.js
+    dstr/meth-dflt-ary-ptrn-elision-step-err.js
+    dstr/meth-dflt-ary-ptrn-empty.js
+    dstr/meth-dflt-ary-ptrn-rest-ary-elem.js
+    dstr/meth-dflt-ary-ptrn-rest-ary-elision.js
+    dstr/meth-dflt-ary-ptrn-rest-ary-empty.js
+    dstr/meth-dflt-ary-ptrn-rest-ary-rest.js
+    dstr/meth-dflt-ary-ptrn-rest-id.js
+    dstr/meth-dflt-ary-ptrn-rest-id-direct.js
+    dstr/meth-dflt-ary-ptrn-rest-id-elision.js
+    dstr/meth-dflt-ary-ptrn-rest-id-elision-next-err.js
+    dstr/meth-dflt-ary-ptrn-rest-id-exhausted.js
+    dstr/meth-dflt-ary-ptrn-rest-id-iter-step-err.js
+    dstr/meth-dflt-ary-ptrn-rest-id-iter-val-err.js
+    dstr/meth-dflt-ary-ptrn-rest-obj-id.js
+    dstr/meth-dflt-ary-ptrn-rest-obj-prop-id.js
+    dstr/meth-dflt-obj-init-null.js
+    dstr/meth-dflt-obj-init-undefined.js
+    dstr/meth-dflt-obj-ptrn-empty.js
+    dstr/meth-dflt-obj-ptrn-id-get-value-err.js
+    dstr/meth-dflt-obj-ptrn-id-init-fn-name-arrow.js
+    dstr/meth-dflt-obj-ptrn-id-init-fn-name-class.js
+    dstr/meth-dflt-obj-ptrn-id-init-fn-name-cover.js
+    dstr/meth-dflt-obj-ptrn-id-init-fn-name-fn.js
+    dstr/meth-dflt-obj-ptrn-id-init-fn-name-gen.js
+    dstr/meth-dflt-obj-ptrn-id-init-skipped.js
+    dstr/meth-dflt-obj-ptrn-id-init-throws.js
+    dstr/meth-dflt-obj-ptrn-id-init-unresolvable.js
+    dstr/meth-dflt-obj-ptrn-id-trailing-comma.js
+    dstr/meth-dflt-obj-ptrn-list-err.js
+    dstr/meth-dflt-obj-ptrn-prop-ary.js
+    dstr/meth-dflt-obj-ptrn-prop-ary-init.js
+    dstr/meth-dflt-obj-ptrn-prop-ary-trailing-comma.js
+    dstr/meth-dflt-obj-ptrn-prop-ary-value-null.js
+    dstr/meth-dflt-obj-ptrn-prop-eval-err.js
+    dstr/meth-dflt-obj-ptrn-prop-id.js
+    dstr/meth-dflt-obj-ptrn-prop-id-get-value-err.js
+    dstr/meth-dflt-obj-ptrn-prop-id-init.js
+    dstr/meth-dflt-obj-ptrn-prop-id-init-skipped.js
+    dstr/meth-dflt-obj-ptrn-prop-id-init-throws.js
+    dstr/meth-dflt-obj-ptrn-prop-id-init-unresolvable.js
+    dstr/meth-dflt-obj-ptrn-prop-id-trailing-comma.js
+    dstr/meth-dflt-obj-ptrn-prop-obj.js
+    dstr/meth-dflt-obj-ptrn-prop-obj-init.js
+    dstr/meth-dflt-obj-ptrn-prop-obj-value-null.js
+    dstr/meth-dflt-obj-ptrn-prop-obj-value-undef.js
+    dstr/meth-dflt-obj-ptrn-rest-getter.js {unsupported: [object-rest]}
+    dstr/meth-dflt-obj-ptrn-rest-skip-non-enumerable.js {unsupported: [object-rest]}
+    dstr/meth-dflt-obj-ptrn-rest-val-obj.js {unsupported: [object-rest]}
     dstr/meth-obj-init-null.js
     dstr/meth-obj-init-undefined.js
     dstr/meth-obj-ptrn-id-init-fn-name-arrow.js
@@ -4466,17 +4408,17 @@ language/expressions/object 836/1081 (77.34%)
     method-definition/async-gen-await-as-label-identifier.js {unsupported: [async-iteration]}
     method-definition/async-gen-await-as-label-identifier-escaped.js {unsupported: [async-iteration]}
     method-definition/async-gen-meth-array-destructuring-param-strict-body.js {unsupported: [async-iteration]}
-    method-definition/async-gen-meth-dflt-params-abrupt.js {unsupported: [default-parameters, async-iteration]}
-    method-definition/async-gen-meth-dflt-params-arg-val-not-undefined.js {unsupported: [default-parameters, async-iteration, async]}
-    method-definition/async-gen-meth-dflt-params-arg-val-undefined.js {unsupported: [default-parameters, async-iteration, async]}
-    method-definition/async-gen-meth-dflt-params-duplicates.js {unsupported: [default-parameters, async-iteration]}
-    method-definition/async-gen-meth-dflt-params-ref-later.js {unsupported: [default-parameters, async-iteration]}
-    method-definition/async-gen-meth-dflt-params-ref-prior.js {unsupported: [default-parameters, async-iteration, async]}
-    method-definition/async-gen-meth-dflt-params-ref-self.js {unsupported: [default-parameters, async-iteration]}
-    method-definition/async-gen-meth-dflt-params-rest.js {unsupported: [default-parameters, async-iteration]}
+    method-definition/async-gen-meth-dflt-params-abrupt.js {unsupported: [async-iteration]}
+    method-definition/async-gen-meth-dflt-params-arg-val-not-undefined.js {unsupported: [async-iteration, async]}
+    method-definition/async-gen-meth-dflt-params-arg-val-undefined.js {unsupported: [async-iteration, async]}
+    method-definition/async-gen-meth-dflt-params-duplicates.js {unsupported: [async-iteration]}
+    method-definition/async-gen-meth-dflt-params-ref-later.js {unsupported: [async-iteration]}
+    method-definition/async-gen-meth-dflt-params-ref-prior.js {unsupported: [async-iteration, async]}
+    method-definition/async-gen-meth-dflt-params-ref-self.js {unsupported: [async-iteration]}
+    method-definition/async-gen-meth-dflt-params-rest.js {unsupported: [async-iteration]}
     method-definition/async-gen-meth-dflt-params-trailing-comma.js {unsupported: [async-iteration, async]}
     method-definition/async-gen-meth-escaped-async.js {unsupported: [async-iteration]}
-    method-definition/async-gen-meth-eval-var-scope-syntax-err.js {unsupported: [default-parameters, async-iteration]}
+    method-definition/async-gen-meth-eval-var-scope-syntax-err.js {unsupported: [async-iteration]}
     method-definition/async-gen-meth-object-destructuring-param-strict-body.js {unsupported: [async-iteration]}
     method-definition/async-gen-meth-params-trailing-comma-multiple.js {unsupported: [async-iteration, async]}
     method-definition/async-gen-meth-params-trailing-comma-single.js {unsupported: [async-iteration, async]}
@@ -4558,17 +4500,17 @@ language/expressions/object 836/1081 (77.34%)
     method-definition/async-gen-yield-star-sync-return.js {unsupported: [async-iteration, async]}
     method-definition/async-gen-yield-star-sync-throw.js {unsupported: [async-iteration, async]}
     method-definition/async-meth-array-destructuring-param-strict-body.js {unsupported: [async-iteration]}
-    method-definition/async-meth-dflt-params-abrupt.js {unsupported: [default-parameters, async-functions, async]}
-    method-definition/async-meth-dflt-params-arg-val-not-undefined.js {unsupported: [default-parameters, async-functions, async]}
-    method-definition/async-meth-dflt-params-arg-val-undefined.js {unsupported: [default-parameters, async-functions, async]}
-    method-definition/async-meth-dflt-params-duplicates.js {unsupported: [default-parameters, async-iteration]}
-    method-definition/async-meth-dflt-params-ref-later.js {unsupported: [default-parameters, async-functions, async]}
-    method-definition/async-meth-dflt-params-ref-prior.js {unsupported: [default-parameters, async-functions, async]}
-    method-definition/async-meth-dflt-params-ref-self.js {unsupported: [default-parameters, async-functions, async]}
-    method-definition/async-meth-dflt-params-rest.js {unsupported: [default-parameters, async-iteration]}
+    method-definition/async-meth-dflt-params-abrupt.js {unsupported: [async-functions, async]}
+    method-definition/async-meth-dflt-params-arg-val-not-undefined.js {unsupported: [async-functions, async]}
+    method-definition/async-meth-dflt-params-arg-val-undefined.js {unsupported: [async-functions, async]}
+    method-definition/async-meth-dflt-params-duplicates.js {unsupported: [async-iteration]}
+    method-definition/async-meth-dflt-params-ref-later.js {unsupported: [async-functions, async]}
+    method-definition/async-meth-dflt-params-ref-prior.js {unsupported: [async-functions, async]}
+    method-definition/async-meth-dflt-params-ref-self.js {unsupported: [async-functions, async]}
+    method-definition/async-meth-dflt-params-rest.js {unsupported: [async-iteration]}
     method-definition/async-meth-dflt-params-trailing-comma.js {unsupported: [async-functions, async]}
     method-definition/async-meth-escaped-async.js {unsupported: [async-functions]}
-    method-definition/async-meth-eval-var-scope-syntax-err.js {unsupported: [default-parameters, async-functions, async]}
+    method-definition/async-meth-eval-var-scope-syntax-err.js {unsupported: [async-functions, async]}
     method-definition/async-meth-object-destructuring-param-strict-body.js {unsupported: [async-iteration]}
     method-definition/async-meth-params-trailing-comma-multiple.js {unsupported: [async-functions, async]}
     method-definition/async-meth-params-trailing-comma-single.js {unsupported: [async-functions, async]}
@@ -4587,16 +4529,14 @@ language/expressions/object 836/1081 (77.34%)
     method-definition/escaped-set-t.js
     method-definition/fn-name-fn.js
     method-definition/fn-name-gen.js
-    method-definition/gen-meth-dflt-params-abrupt.js {unsupported: [default-parameters]}
-    method-definition/gen-meth-dflt-params-arg-val-not-undefined.js {unsupported: [default-parameters]}
-    method-definition/gen-meth-dflt-params-arg-val-undefined.js {unsupported: [default-parameters]}
-    method-definition/gen-meth-dflt-params-duplicates.js {unsupported: [default-parameters]}
-    method-definition/gen-meth-dflt-params-ref-later.js {unsupported: [default-parameters]}
-    method-definition/gen-meth-dflt-params-ref-prior.js {unsupported: [default-parameters]}
-    method-definition/gen-meth-dflt-params-ref-self.js {unsupported: [default-parameters]}
-    method-definition/gen-meth-dflt-params-rest.js {unsupported: [default-parameters]}
+    method-definition/gen-meth-dflt-params-abrupt.js
+    method-definition/gen-meth-dflt-params-arg-val-not-undefined.js
+    method-definition/gen-meth-dflt-params-arg-val-undefined.js
+    method-definition/gen-meth-dflt-params-ref-later.js
+    method-definition/gen-meth-dflt-params-ref-prior.js
+    method-definition/gen-meth-dflt-params-ref-self.js
     method-definition/gen-meth-dflt-params-trailing-comma.js
-    method-definition/gen-meth-eval-var-scope-syntax-err.js {unsupported: [default-parameters]}
+    method-definition/gen-meth-eval-var-scope-syntax-err.js non-strict
     method-definition/gen-meth-params-trailing-comma-multiple.js
     method-definition/gen-meth-params-trailing-comma-single.js
     method-definition/gen-yield-identifier-non-strict.js non-strict
@@ -4608,7 +4548,7 @@ language/expressions/object 836/1081 (77.34%)
     method-definition/generator-invoke-fn-no-strict.js non-strict
     method-definition/generator-invoke-fn-strict.js non-strict
     method-definition/generator-length.js
-    method-definition/generator-length-dflt.js {unsupported: [default-parameters]}
+    method-definition/generator-length-dflt.js
     method-definition/generator-name-prop-string.js
     method-definition/generator-name-prop-symbol.js
     method-definition/generator-no-yield.js
@@ -4621,23 +4561,19 @@ language/expressions/object 836/1081 (77.34%)
     method-definition/generator-prototype-prop.js
     method-definition/generator-return.js
     method-definition/generator-super-prop-body.js
-    method-definition/generator-super-prop-param.js {unsupported: [super, default-parameters]}
+    method-definition/generator-super-prop-param.js {unsupported: [super]}
     method-definition/meth-array-destructuring-param-strict-body.js
-    method-definition/meth-dflt-params-abrupt.js {unsupported: [default-parameters]}
-    method-definition/meth-dflt-params-arg-val-not-undefined.js {unsupported: [default-parameters]}
-    method-definition/meth-dflt-params-arg-val-undefined.js {unsupported: [default-parameters]}
-    method-definition/meth-dflt-params-duplicates.js {unsupported: [default-parameters]}
-    method-definition/meth-dflt-params-ref-later.js {unsupported: [default-parameters]}
-    method-definition/meth-dflt-params-ref-prior.js {unsupported: [default-parameters]}
-    method-definition/meth-dflt-params-ref-self.js {unsupported: [default-parameters]}
-    method-definition/meth-dflt-params-rest.js {unsupported: [default-parameters]}
+    method-definition/meth-dflt-params-duplicates.js non-strict
+    method-definition/meth-dflt-params-ref-later.js
+    method-definition/meth-dflt-params-ref-self.js
+    method-definition/meth-dflt-params-rest.js
     method-definition/meth-dflt-params-trailing-comma.js
-    method-definition/meth-eval-var-scope-syntax-err.js {unsupported: [default-parameters]}
+    method-definition/meth-eval-var-scope-syntax-err.js non-strict
     method-definition/meth-object-destructuring-param-strict-body.js
     method-definition/meth-rest-param-strict-body.js
     method-definition/name-invoke-ctor.js
     method-definition/name-invoke-fn-strict.js non-strict
-    method-definition/name-length-dflt.js {unsupported: [default-parameters]}
+    method-definition/name-length-dflt.js
     method-definition/name-name-prop-string.js
     method-definition/name-name-prop-symbol.js
     method-definition/name-param-id-yield.js non-strict
@@ -4650,10 +4586,9 @@ language/expressions/object 836/1081 (77.34%)
     method-definition/name-super-prop-body.js {unsupported: [super]}
     method-definition/name-super-prop-param.js {unsupported: [super]}
     method-definition/object-method-returns-promise.js
-    method-definition/params-dflt-gen-meth-args-unmapped.js {unsupported: [default-parameters]}
-    method-definition/params-dflt-gen-meth-ref-arguments.js {unsupported: [default-parameters]}
-    method-definition/params-dflt-meth-args-unmapped.js {unsupported: [default-parameters]}
-    method-definition/params-dflt-meth-ref-arguments.js {unsupported: [default-parameters]}
+    method-definition/params-dflt-gen-meth-args-unmapped.js
+    method-definition/params-dflt-gen-meth-ref-arguments.js
+    method-definition/params-dflt-meth-ref-arguments.js
     method-definition/private-name-early-error-async-fn.js {unsupported: [async-functions]}
     method-definition/private-name-early-error-async-fn-inside-class.js {unsupported: [class-fields-public, async-functions, class]}
     method-definition/private-name-early-error-async-gen.js {unsupported: [async-iteration]}
@@ -4715,7 +4650,7 @@ language/expressions/object 836/1081 (77.34%)
     fn-name-gen.js
     getter-body-strict-inside.js non-strict
     getter-body-strict-outside.js strict
-    getter-param-dflt.js {unsupported: [default-parameters]}
+    getter-param-dflt.js
     getter-super-prop.js
     let-non-strict-access.js non-strict
     let-non-strict-syntax.js non-strict
@@ -4741,18 +4676,14 @@ language/expressions/object 836/1081 (77.34%)
     scope-gen-meth-paramsbody-var-open.js
     scope-getter-body-lex-distinc.js non-strict
     scope-meth-body-lex-distinct.js non-strict
-    scope-meth-param-elem-var-close.js non-strict
-    scope-meth-param-elem-var-open.js non-strict
     scope-meth-param-rest-elem-var-close.js non-strict
     scope-meth-param-rest-elem-var-open.js non-strict
-    scope-meth-paramsbody-var-close.js
     scope-meth-paramsbody-var-open.js
     scope-setter-body-lex-distinc.js non-strict
-    scope-setter-paramsbody-var-close.js
     scope-setter-paramsbody-var-open.js
     setter-body-strict-inside.js non-strict
     setter-body-strict-outside.js strict
-    setter-length-dflt.js {unsupported: [default-parameters]}
+    setter-length-dflt.js
     setter-param-arguments-strict-inside.js non-strict
     setter-param-eval-strict-inside.js non-strict
     setter-super-prop.js
@@ -5123,7 +5054,7 @@ language/reserved-words 2/27 (7.41%)
 language/rest-parameters 5/11 (45.45%)
     array-pattern.js
     arrow-function.js
-    no-alias-arguments.js
+    no-alias-arguments.js non-strict
     object-pattern.js
     with-new-target.js
 
@@ -5908,7 +5839,7 @@ language/statements/for-of 471/725 (64.97%)
     scope-head-lex-open.js
     scope-head-var-none.js non-strict
 
-language/statements/generators 220/259 (84.94%)
+language/statements/generators 208/259 (80.31%)
     dstr/ary-init-iter-close.js
     dstr/ary-init-iter-get-err.js
     dstr/ary-init-iter-get-err-array-prototype.js
@@ -5959,99 +5890,93 @@ language/statements/generators 220/259 (84.94%)
     dstr/ary-ptrn-rest-id-iter-val-err.js
     dstr/ary-ptrn-rest-obj-id.js
     dstr/ary-ptrn-rest-obj-prop-id.js
-    dstr/dflt-ary-init-iter-close.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-get-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-get-err-array-prototype.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-init-iter-no-close.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-name-iter-val.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elem-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elem-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elision-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-elision-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-empty-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-empty-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-rest-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-rest-iter.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-ary-val-null.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-hole.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-complete.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-done.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-id-iter-val-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-val-null.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elem-obj-val-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-elision-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-empty.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-ary-elem.js {unsupported: [default-parameters]}
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-    dstr/dflt-ary-ptrn-rest-id-elision.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-elision-next-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-exhausted.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-iter-step-err.js {unsupported: [default-parameters]}
-    dstr/dflt-ary-ptrn-rest-id-iter-val-err.js {unsupported: [default-parameters]}
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-    dstr/dflt-obj-ptrn-id-get-value-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-class.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-cover.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-fn.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-fn-name-gen.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-id-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-list-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-ary-value-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-eval-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-get-value-err.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-skipped.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-throws.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-id-trailing-comma.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-init.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-value-null.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-prop-obj-value-undef.js {unsupported: [default-parameters]}
-    dstr/dflt-obj-ptrn-rest-getter.js {unsupported: [default-parameters, object-rest]}
-    dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js {unsupported: [default-parameters, object-rest]}
-    dstr/dflt-obj-ptrn-rest-val-obj.js {unsupported: [default-parameters, object-rest]}
+    dstr/dflt-ary-init-iter-close.js
+    dstr/dflt-ary-init-iter-get-err.js
+    dstr/dflt-ary-init-iter-get-err-array-prototype.js
+    dstr/dflt-ary-init-iter-no-close.js
+    dstr/dflt-ary-name-iter-val.js
+    dstr/dflt-ary-ptrn-elem-ary-elem-init.js
+    dstr/dflt-ary-ptrn-elem-ary-elem-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-elision-init.js
+    dstr/dflt-ary-ptrn-elem-ary-elision-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-empty-init.js
+    dstr/dflt-ary-ptrn-elem-ary-empty-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-rest-init.js
+    dstr/dflt-ary-ptrn-elem-ary-rest-iter.js
+    dstr/dflt-ary-ptrn-elem-ary-val-null.js
+    dstr/dflt-ary-ptrn-elem-id-init-exhausted.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-arrow.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-class.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-cover.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-fn.js
+    dstr/dflt-ary-ptrn-elem-id-init-fn-name-gen.js
+    dstr/dflt-ary-ptrn-elem-id-init-hole.js
+    dstr/dflt-ary-ptrn-elem-id-init-skipped.js
+    dstr/dflt-ary-ptrn-elem-id-init-throws.js
+    dstr/dflt-ary-ptrn-elem-id-init-undef.js
+    dstr/dflt-ary-ptrn-elem-id-init-unresolvable.js
+    dstr/dflt-ary-ptrn-elem-id-iter-complete.js
+    dstr/dflt-ary-ptrn-elem-id-iter-done.js
+    dstr/dflt-ary-ptrn-elem-id-iter-step-err.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val-array-prototype.js
+    dstr/dflt-ary-ptrn-elem-id-iter-val-err.js
+    dstr/dflt-ary-ptrn-elem-obj-id.js
+    dstr/dflt-ary-ptrn-elem-obj-id-init.js
+    dstr/dflt-ary-ptrn-elem-obj-prop-id.js
+    dstr/dflt-ary-ptrn-elem-obj-prop-id-init.js
+    dstr/dflt-ary-ptrn-elem-obj-val-null.js
+    dstr/dflt-ary-ptrn-elem-obj-val-undef.js
+    dstr/dflt-ary-ptrn-elision.js
+    dstr/dflt-ary-ptrn-elision-exhausted.js
+    dstr/dflt-ary-ptrn-elision-step-err.js
+    dstr/dflt-ary-ptrn-empty.js
+    dstr/dflt-ary-ptrn-rest-ary-elem.js
+    dstr/dflt-ary-ptrn-rest-ary-elision.js
+    dstr/dflt-ary-ptrn-rest-ary-empty.js
+    dstr/dflt-ary-ptrn-rest-ary-rest.js
+    dstr/dflt-ary-ptrn-rest-id.js
+    dstr/dflt-ary-ptrn-rest-id-direct.js
+    dstr/dflt-ary-ptrn-rest-id-elision.js
+    dstr/dflt-ary-ptrn-rest-id-elision-next-err.js
+    dstr/dflt-ary-ptrn-rest-id-exhausted.js
+    dstr/dflt-ary-ptrn-rest-id-iter-step-err.js
+    dstr/dflt-ary-ptrn-rest-id-iter-val-err.js
+    dstr/dflt-ary-ptrn-rest-obj-id.js
+    dstr/dflt-ary-ptrn-rest-obj-prop-id.js
+    dstr/dflt-obj-init-null.js
+    dstr/dflt-obj-init-undefined.js
+    dstr/dflt-obj-ptrn-empty.js
+    dstr/dflt-obj-ptrn-id-get-value-err.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-arrow.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-class.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-cover.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-fn.js
+    dstr/dflt-obj-ptrn-id-init-fn-name-gen.js
+    dstr/dflt-obj-ptrn-id-init-skipped.js
+    dstr/dflt-obj-ptrn-id-init-throws.js
+    dstr/dflt-obj-ptrn-id-init-unresolvable.js
+    dstr/dflt-obj-ptrn-id-trailing-comma.js
+    dstr/dflt-obj-ptrn-list-err.js
+    dstr/dflt-obj-ptrn-prop-ary.js
+    dstr/dflt-obj-ptrn-prop-ary-init.js
+    dstr/dflt-obj-ptrn-prop-ary-trailing-comma.js
+    dstr/dflt-obj-ptrn-prop-ary-value-null.js
+    dstr/dflt-obj-ptrn-prop-eval-err.js
+    dstr/dflt-obj-ptrn-prop-id.js
+    dstr/dflt-obj-ptrn-prop-id-get-value-err.js
+    dstr/dflt-obj-ptrn-prop-id-init.js
+    dstr/dflt-obj-ptrn-prop-id-init-skipped.js
+    dstr/dflt-obj-ptrn-prop-id-init-throws.js
+    dstr/dflt-obj-ptrn-prop-id-init-unresolvable.js
+    dstr/dflt-obj-ptrn-prop-id-trailing-comma.js
+    dstr/dflt-obj-ptrn-prop-obj.js
+    dstr/dflt-obj-ptrn-prop-obj-init.js
+    dstr/dflt-obj-ptrn-prop-obj-value-null.js
+    dstr/dflt-obj-ptrn-prop-obj-value-undef.js
+    dstr/dflt-obj-ptrn-rest-getter.js {unsupported: [object-rest]}
+    dstr/dflt-obj-ptrn-rest-skip-non-enumerable.js {unsupported: [object-rest]}
+    dstr/dflt-obj-ptrn-rest-val-obj.js {unsupported: [object-rest]}
     dstr/obj-init-null.js
     dstr/obj-init-undefined.js
     dstr/obj-ptrn-id-get-value-err.js
@@ -6087,24 +6012,21 @@ language/statements/generators 220/259 (84.94%)
     array-destructuring-param-strict-body.js
     cptn-decl.js
     default-proto.js
-    dflt-params-abrupt.js {unsupported: [default-parameters]}
-    dflt-params-arg-val-not-undefined.js {unsupported: [default-parameters]}
-    dflt-params-arg-val-undefined.js {unsupported: [default-parameters]}
-    dflt-params-duplicates.js {unsupported: [default-parameters]}
-    dflt-params-ref-later.js {unsupported: [default-parameters]}
-    dflt-params-ref-prior.js {unsupported: [default-parameters]}
-    dflt-params-ref-self.js {unsupported: [default-parameters]}
-    dflt-params-rest.js {unsupported: [default-parameters]}
+    dflt-params-abrupt.js
+    dflt-params-arg-val-not-undefined.js non-interpreted
+    dflt-params-arg-val-undefined.js non-interpreted
+    dflt-params-duplicates.js non-strict
+    dflt-params-ref-later.js
+    dflt-params-ref-prior.js non-interpreted
+    dflt-params-ref-self.js
+    dflt-params-rest.js
     dflt-params-trailing-comma.js
-    eval-var-scope-syntax-err.js {unsupported: [default-parameters]}
-    generator-created-after-decl-inst.js
+    eval-var-scope-syntax-err.js non-strict
     has-instance.js
     invoke-as-constructor.js
-    length-dflt.js {unsupported: [default-parameters]}
+    length-dflt.js
     object-destructuring-param-strict-body.js
-    param-dflt-yield.js {unsupported: [default-parameters]}
-    params-dflt-args-unmapped.js {unsupported: [default-parameters]}
-    params-dflt-ref-arguments.js {unsupported: [default-parameters]}
+    params-dflt-ref-arguments.js
     params-trailing-comma-multiple.js non-interpreted
     params-trailing-comma-single.js non-interpreted
     prototype-own-properties.js
@@ -6113,11 +6035,8 @@ language/statements/generators 220/259 (84.94%)
     rest-param-strict-body.js
     restricted-properties.js
     scope-body-lex-distinct.js non-strict
-    scope-param-elem-var-close.js non-strict
-    scope-param-elem-var-open.js non-strict
     scope-param-rest-elem-var-close.js non-strict
     scope-param-rest-elem-var-open.js non-strict
-    scope-paramsbody-var-close.js
     scope-paramsbody-var-open.js
     yield-as-function-expression-binding-identifier.js non-strict
     yield-as-generator-declaration-binding-identifier.js non-strict