diff --git a/tsconfig_test.json b/tsconfig_test.json
index 8dee5fa2a4a1..2d2123fac960 100644
--- a/tsconfig_test.json
+++ b/tsconfig_test.json
@@ -1,5 +1,6 @@
 {
   "compilerOptions": {
-    "isolatedModules": true
+    "isolatedModules": true,
+    "importsNotUsedAsValues": "error"
   }
 }