diff --git a/test/scripts/generate-ostree-build-config b/test/scripts/generate-ostree-build-config
index 578591db0..e774f6f83 100755
--- a/test/scripts/generate-ostree-build-config
+++ b/test/scripts/generate-ostree-build-config
@@ -280,7 +280,7 @@ def setup_dependencies(manifests, config_map, distro, arch):
     finally:
         if container_ids:
             print("📦 Stopping containers")
-            out, _ = testlib.runcmd(["sudo", "podman", "stop", " ".join(container_ids)])
+            out, _ = testlib.runcmd(["sudo", "podman", "stop", *container_ids])
             print(out.decode())