diff --git a/tests/cases/conformance/decorators/1.0lib-noErrors.ts b/tests/cases/conformance/decorators/1.0lib-noErrors.ts
index 5404c6369ca..c070dd6966c 100644
--- a/tests/cases/conformance/decorators/1.0lib-noErrors.ts
+++ b/tests/cases/conformance/decorators/1.0lib-noErrors.ts
@@ -15,6 +15,8 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
+/// <reference no-default-lib="true"/>
+
 /////////////////////////////
 /// ECMAScript APIs
 /////////////////////////////