diff --git a/tests/Android.mk b/tests/Android.mk
index 978209f..0c41241 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -69,3 +69,5 @@
 LOCAL_INSTRUMENTATION_FOR := Launcher3
 
 include $(BUILD_PACKAGE)
+
+include $(call all-makefiles-under,$(LOCAL_PATH))