diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 7d3fa75..0f700da 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -435,6 +435,13 @@
 LOCAL_WHOLE_STATIC_LIBRARIES_32:=
 LOCAL_WHOLE_STATIC_LIBRARIES_64:=
 
+# Robolectric variables
+LOCAL_INSTRUMENT_SOURCE_DIRS :=
+LOCAL_ROBOTEST_FAILURE_FATAL :=
+LOCAL_ROBOTEST_FILES :=
+LOCAL_ROBOTEST_TIMEOUT :=
+LOCAL_TEST_PACKAGE :=
+
 # Aux specific variables
 LOCAL_AUX_ARCH :=
 LOCAL_AUX_CPU :=