diff --git a/tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.js b/tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.js
index a96ecb45f66..189dd306ce5 100644
--- a/tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.js
+++ b/tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.js
@@ -31,4 +31,14 @@ Copyright
 ---------------------------------------------------------------------------*/
 ///<reference path="a.ts"/>
 var y = x;
-//# sourceMappingURL=a.js.map
\ No newline at end of file
+//# sourceMappingURL=a.js.map
+
+//// [a.d.ts]
+declare var x: {
+    a: number;
+    b: number;
+};
+declare var y: {
+    a: number;
+    b: number;
+};
diff --git a/tests/cases/compiler/sourceMapWithMultipleFilesWithCopyright.ts b/tests/cases/compiler/sourceMapWithMultipleFilesWithCopyright.ts
index 58730c7d6d7..ac179835a0c 100644
--- a/tests/cases/compiler/sourceMapWithMultipleFilesWithCopyright.ts
+++ b/tests/cases/compiler/sourceMapWithMultipleFilesWithCopyright.ts
@@ -1,5 +1,6 @@
 // @out: a.js
 // @sourcemap: true
+// @declaration: true
 // @Filename: a.ts
 /*--------------------------------------------------------------------------
 Copyright