diff --git a/bin/regression-wally b/bin/regression-wally
index 9a2d29201..6f609ffa0 100755
--- a/bin/regression-wally
+++ b/bin/regression-wally
@@ -519,7 +519,7 @@ def main():
             pass
     if args.ccov:
         TIMEOUT_DUR = 20*60 # seconds
-        os.system('rm -f questa/cov/*.ucdb')
+        os.system('rm -f questa/ucdb/* questa/cov/*')
     elif args.fcov:
         TIMEOUT_DUR = 8*60
         os.system('rm -f questa/fcov_ucdb/* questa/fcov_logs/* questa/fcov/*')