diff --git a/tools/distrib/check_nanopb_output.sh b/tools/distrib/check_nanopb_output.sh
index 9cb7581d87fc44e23d5fe2d77d4418ae1cf7e0b3..99fd6806c4996b7bb1065d26f7c45397b940b34d 100755
--- a/tools/distrib/check_nanopb_output.sh
+++ b/tools/distrib/check_nanopb_output.sh
@@ -67,3 +67,5 @@ if [ $? != 0 ]; then
   echo "Outputs differ: $NANOPB_TMP_OUTPUT vs src/core/proto/grpc/lb/v0"
   exit 1
 fi
+
+rm -Rf $NANOPB_TMP_OUTPUT