diff --git a/tools/run_tests/run_sanity.sh b/tools/run_tests/run_sanity.sh
index dd096ce2c27..32e25661fa9 100755
--- a/tools/run_tests/run_sanity.sh
+++ b/tools/run_tests/run_sanity.sh
@@ -50,6 +50,8 @@ EOF
 
 diff -u $submodules $want_submodules
 
+rm $submodules $want_submodules
+
 if git ls-files cache.mk --error-unmatch &> /dev/null ; then
   echo "Please don't commit cache.mk"
   exit 1