diff --git a/types/ember-testing-helpers/tsconfig.json b/types/ember-testing-helpers/tsconfig.json
index cd7634bd25..aaf474ecba 100644
--- a/types/ember-testing-helpers/tsconfig.json
+++ b/types/ember-testing-helpers/tsconfig.json
@@ -14,8 +14,7 @@
         ],
         "types": [],
         "noEmit": true,
-        "forceConsistentCasingInFileNames": true,
-        "allowSyntheticDefaultImports": true
+        "forceConsistentCasingInFileNames": true
     },
     "files": [
         "index.d.ts",