diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 642128af2..b95429b29 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -370,6 +370,7 @@ pre_parse_command_line () {
 
 pre_check_git () {
     if [ $FORCE -eq 1 ]; then
+        rm -rf "$OUT_OF_SOURCE_DIR"
         git checkout-index -f -q $CONFIG_H
         cleanup
     else