diff --git a/tests/cases/fourslash/findAllRefsForMappedType.ts b/tests/cases/fourslash/findAllRefsForMappedType.ts
index 620eae0815c..38fb3a226c6 100644
--- a/tests/cases/fourslash/findAllRefsForMappedType.ts
+++ b/tests/cases/fourslash/findAllRefsForMappedType.ts
@@ -1,7 +1,7 @@
 /// <reference path='fourslash.ts'/>
 
 ////interface T { [|a|]: number };
-////type U { [K in keyof T]: string };
+////type U = { [K in keyof T]: string };
 ////type V = { [K in keyof U]: boolean };
 ////const u: U = { [|a|]: "" }
 ////const v: V = { [|a|]: true }