diff --git a/src/commands/commandUtils.ml b/src/commands/commandUtils.ml
index abded9aa5b0..7473705e023 100644
--- a/src/commands/commandUtils.ml
+++ b/src/commands/commandUtils.ml
@@ -1378,7 +1378,7 @@ let make_options
       |> min Sys_utils.nbr_procs;
     opt_suppress_types = FlowConfig.suppress_types flowconfig;
     opt_max_literal_length = FlowConfig.max_literal_length flowconfig;
-    opt_as_const = Base.Option.value ~default:false (FlowConfig.enable_as_const flowconfig);
+    opt_as_const = Base.Option.value ~default:true (FlowConfig.enable_as_const flowconfig);
     opt_component_syntax = FlowConfig.component_syntax flowconfig;
     opt_react_rules = FlowConfig.react_rules flowconfig;
     opt_hook_compatibility = FlowConfig.hook_compatibility flowconfig;
diff --git a/tests/as_const/.flowconfig b/tests/as_const/.flowconfig
index 0fd5ce20d73..9b7d0f89d28 100644
--- a/tests/as_const/.flowconfig
+++ b/tests/as_const/.flowconfig
@@ -1,5 +1,4 @@
 [options]
 all=true
-as_const=true
 experimental.ts_syntax=true
 no_flowlib=false
diff --git a/tests/natural_inference_primitive/.flowconfig b/tests/natural_inference_primitive/.flowconfig
index 7c19702d118..48d74ccc0da 100644
--- a/tests/natural_inference_primitive/.flowconfig
+++ b/tests/natural_inference_primitive/.flowconfig
@@ -8,7 +8,6 @@
 
 [options]
 all=true
-as_const=true
 experimental.natural_inference.exports.primitive_const=true
 
 [strict]
diff --git a/tests/type_at_pos_const_literals/.flowconfig b/tests/type_at_pos_const_literals/.flowconfig
index e71c822f78e..40e9c12c367 100644
--- a/tests/type_at_pos_const_literals/.flowconfig
+++ b/tests/type_at_pos_const_literals/.flowconfig
@@ -1,3 +1,2 @@
 [options]
 all=true
-as_const=true