diff --git a/tests/docker/docker.py b/tests/docker/docker.py
index 3112892fdf..31d8adf836 100755
--- a/tests/docker/docker.py
+++ b/tests/docker/docker.py
@@ -332,7 +332,7 @@ class Docker(object):
             cmd = [ "-u", str(uid) ] + cmd
             # podman requires a bit more fiddling
             if self._command[0] == "podman":
-                argv.insert(0, '--userns=keep-id')
+                cmd.insert(0, '--userns=keep-id')
 
         ret = self._do_check(["run", "--label",
                              "com.qemu.instance.uuid=" + label] + cmd,