diff --git a/test-app/app/app.js b/test-app/app/app.ts
similarity index 100%
rename from test-app/app/app.js
rename to test-app/app/app.ts
diff --git a/test-app/config/environment.d.ts b/test-app/app/config/environment.d.ts
similarity index 100%
rename from test-app/config/environment.d.ts
rename to test-app/app/config/environment.d.ts
diff --git a/test-app/app/router.js b/test-app/app/router.ts
similarity index 100%
rename from test-app/app/router.js
rename to test-app/app/router.ts
diff --git a/test-app/types/index.d.ts b/test-app/types/index.d.ts
deleted file mode 100644
index 2109bac6..00000000
--- a/test-app/types/index.d.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-import 'ember-source/types';
-import 'ember-source/types/preview';
diff --git a/test-app/types/test-app/index.d.ts b/test-app/types/test-app/index.d.ts
index 37d090ab..2109bac6 100644
--- a/test-app/types/test-app/index.d.ts
+++ b/test-app/types/test-app/index.d.ts
@@ -1,2 +1,2 @@
-declare module 'test-app/config/environment';
-declare module 'test-app/app';
+import 'ember-source/types';
+import 'ember-source/types/preview';