diff --git a/tests/hwsim/run-tests.py b/tests/hwsim/run-tests.py
index 2b8d4d25e..9161576dc 100755
--- a/tests/hwsim/run-tests.py
+++ b/tests/hwsim/run-tests.py
@@ -282,7 +282,7 @@ def main():
                 line = line.strip()
                 if not line or line.startswith('#'):
                     continue
-                    args.testmodules.append(line)
+                args.testmodules.append(line)
 
     tests_to_run = []
     if args.tests: