diff --git a/tests/cases/conformance/types/tuple/readonlyArraysAndTuples.ts b/tests/cases/conformance/types/tuple/readonlyArraysAndTuples.ts
index 7a30f6b46c4..6e7e5e3d6e8 100644
--- a/tests/cases/conformance/types/tuple/readonlyArraysAndTuples.ts
+++ b/tests/cases/conformance/types/tuple/readonlyArraysAndTuples.ts
@@ -1,4 +1,5 @@
 // @strict: true
+// @declaration: true
 
 type T10 = string[];
 type T11 = Array<string>;