diff --git a/crates/stc_ts_file_analyzer/tests/base.rs b/crates/stc_ts_file_analyzer/tests/base.rs
index 05da201bdd..264551732c 100644
--- a/crates/stc_ts_file_analyzer/tests/base.rs
+++ b/crates/stc_ts_file_analyzer/tests/base.rs
@@ -13,7 +13,7 @@ use rnode::{NodeIdGenerator, RNode, VisitWith};
 use stc_testing::logger;
 use stc_ts_ast_rnode::RModule;
 use stc_ts_builtin_types::Lib;
-use stc_ts_env::{Env, ModuleConfig, Rule};
+use stc_ts_env::Env;
 use stc_ts_errors::{debug::debugger::Debugger, ErrorKind};
 use stc_ts_file_analyzer::{
     analyzer::{Analyzer, NoopLoader},
@@ -41,8 +41,9 @@ struct StcError {
     code: usize,
 }
 
-fn get_env() -> Env {
-    let mut libs = vec![];
+fn get_env_from_path(path: &Path, mut libs: Vec<Lib>) -> Env {
+    let case = parse_conformance_test(path).unwrap().into_iter().next().unwrap();
+    libs.extend(&case.libs);
     let ls = &[
         "es2022.full",
         "es2021.full",
@@ -59,15 +60,7 @@ fn get_env() -> Env {
     libs.sort();
     libs.dedup();
 
-    Env::simple(
-        Rule {
-            strict_function_types: true,
-            ..Default::default()
-        },
-        EsVersion::latest(),
-        ModuleConfig::None,
-        &libs,
-    )
+    Env::simple(case.rule, case.target, case.module_config, &libs)
 }
 
 fn validate(input: &Path) -> Vec<StcError> {
@@ -78,7 +71,7 @@ fn validate(input: &Path) -> Vec<StcError> {
 
             let fm = cm.load_file(input).unwrap();
 
-            let env = get_env();
+            let env = get_env_from_path(input, vec![]);
 
             let generator = module_id::ModuleIdGenerator::default();
             let path = Arc::new(FileName::Real(input.to_path_buf()));
@@ -240,8 +233,6 @@ fn run_test(file_name: PathBuf, want_error: bool, disable_logging: bool) -> Opti
     let filename = file_name.display().to_string();
     println!("{}", filename);
 
-    let case = parse_conformance_test(&file_name).unwrap().into_iter().next().unwrap();
-
     let result = testing::Tester::new()
         .print_errors(|cm, handler| -> Result<(), _> {
             let _tracing = if disable_logging {
@@ -252,22 +243,7 @@ fn run_test(file_name: PathBuf, want_error: bool, disable_logging: bool) -> Opti
 
             let handler = Arc::new(handler);
             let fm = cm.load_file(&file_name).unwrap();
-            let mut libs = vec![];
-            let ls = &[
-                "es2020.full",
-                "es2019.full",
-                "es2018.full",
-                "es2017.full",
-                "es2016.full",
-                "es2015.full",
-            ];
-            for s in ls {
-                libs.extend(Lib::load(s))
-            }
-            libs.sort();
-            libs.dedup();
-
-            let env = Env::simple(case.rule, case.target, case.module_config, &libs);
+            let env = get_env_from_path(&file_name, vec![]);
             let stable_env = env.shared().clone();
             let generator = module_id::ModuleIdGenerator::default();
             let path = Arc::new(FileName::Real(file_name.clone()));
diff --git a/crates/stc_ts_file_analyzer/tests/tsc/rule/strictNullCheck.ts b/crates/stc_ts_file_analyzer/tests/tsc/rule/strictNullCheck.ts
new file mode 100644
index 0000000000..ca1da46a9b
--- /dev/null
+++ b/crates/stc_ts_file_analyzer/tests/tsc/rule/strictNullCheck.ts
@@ -0,0 +1,5 @@
+// @strictNullChecks: true
+// @declaration: true
+
+declare let a : string;
+a = "a" as string | undefined;
\ No newline at end of file
diff --git a/crates/stc_ts_file_analyzer/tests/tsc/rule/strictNullCheck.tsc-errors.json b/crates/stc_ts_file_analyzer/tests/tsc/rule/strictNullCheck.tsc-errors.json
new file mode 100644
index 0000000000..86cc3b9c18
--- /dev/null
+++ b/crates/stc_ts_file_analyzer/tests/tsc/rule/strictNullCheck.tsc-errors.json
@@ -0,0 +1,8 @@
+[
+  {
+    "file": "tests/tsc/rule/strictNullCheck.ts",
+    "line": 5,
+    "col": 1,
+    "code": 2322
+  }
+]
\ No newline at end of file
diff --git a/crates/stc_ts_file_analyzer/tests/tsc/types/intersection/withUnionConstraint/.1.ts b/crates/stc_ts_file_analyzer/tests/tsc/types/intersection/withUnionConstraint/1.ts
similarity index 100%
rename from crates/stc_ts_file_analyzer/tests/tsc/types/intersection/withUnionConstraint/.1.ts
rename to crates/stc_ts_file_analyzer/tests/tsc/types/intersection/withUnionConstraint/1.ts
diff --git a/crates/stc_ts_file_analyzer/tests/tsc/types/intersection/withUnionConstraint/1.tsc-errors.json b/crates/stc_ts_file_analyzer/tests/tsc/types/intersection/withUnionConstraint/1.tsc-errors.json
new file mode 100644
index 0000000000..94fd52114e
--- /dev/null
+++ b/crates/stc_ts_file_analyzer/tests/tsc/types/intersection/withUnionConstraint/1.tsc-errors.json
@@ -0,0 +1,8 @@
+[
+  {
+    "file": "tests/tsc/types/intersection/withUnionConstraint/1.ts",
+    "line": 4,
+    "col": 9,
+    "code": 2322
+  }
+]
\ No newline at end of file
diff --git a/crates/stc_ts_type_checker/tests/tsc-stats.rust-debug b/crates/stc_ts_type_checker/tests/tsc-stats.rust-debug
index 9a3b700764..02553a0cb6 100644
--- a/crates/stc_ts_type_checker/tests/tsc-stats.rust-debug
+++ b/crates/stc_ts_type_checker/tests/tsc-stats.rust-debug
@@ -2,4 +2,5 @@ Stats {
     required_error: 3502,
     matched_error: 6533,
     extra_error: 764,
+    panic: 73,
 }
\ No newline at end of file