diff --git a/pkg/dev_compiler/test/dynamic/platform_allowed.json b/pkg/dev_compiler/test/dynamic/platform_allowed.json
index 1a051c68bab..a6efd91d279 100644
--- a/pkg/dev_compiler/test/dynamic/platform_allowed.json
+++ b/pkg/dev_compiler/test/dynamic/platform_allowed.json
@@ -1,8 +1,4 @@
 {
-  "sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/debugger.dart": {
-    "Dynamic access of 'last'.": 1,
-    "Dynamic invocation of 'split'.": 1
-  },
   "sdk/lib/_internal/js_dev_runtime/private/debugger.dart": {
     "Dynamic invocation of 'toJsonML'.": 1,
     "Dynamic update to 'style'.": 3,
diff --git a/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/debugger.dart b/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/debugger.dart
index af7bb12c55a..9f5e90919f4 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/debugger.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/debugger.dart
@@ -514,7 +514,7 @@ bool _isDartClassObject(@notNull Object object) =>
 
 @notNull
 String _dartClassName(@notNull Object cls) {
-  var recipe = _get(cls, rti.interfaceTypeRecipePropertyName);
+  String recipe = _get(cls, rti.interfaceTypeRecipePropertyName);
   return recipe.split('|').last;
 }