diff --git a/core/main.mk b/core/main.mk
index a061844..b412fe9 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -1247,6 +1247,7 @@
     $(CUSTOM_MODULES) \
   )
 
+ifdef FULL_BUILD
 #
 # Used by the cleanup logic in soong_ui to remove files that should no longer
 # be installed.
@@ -1267,6 +1268,7 @@
     $(test_files)))))
 
 test_files :=
+endif
 
 
 # Don't include any GNU General Public License shared objects or static