diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index ae4bd38..63f44b3 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -117,6 +117,7 @@
 LOCAL_PROPRIETARY_MODULE:=
 LOCAL_MODULE_OWNER:=
 LOCAL_CTS_TEST_PACKAGE:=
+LOCAL_CTS_TEST_RUNNER:=
 
 # Trim MAKEFILE_LIST so that $(call my-dir) doesn't need to
 # iterate over thousands of entries every time.