diff --git a/tests/cases/compiler/numericEnumMappedType.ts b/tests/cases/compiler/numericEnumMappedType.ts
index be29167bb3d..7c03991e6a2 100644
--- a/tests/cases/compiler/numericEnumMappedType.ts
+++ b/tests/cases/compiler/numericEnumMappedType.ts
@@ -1,4 +1,5 @@
 // @strict: true
+// @declaration: true
 
 // Repro from #31771