diff --git a/tests/system/action/test_migration_route.py b/tests/system/action/test_migration_route.py
index aa13c3df9..cbc373bec 100644
--- a/tests/system/action/test_migration_route.py
+++ b/tests/system/action/test_migration_route.py
@@ -114,8 +114,10 @@ def test_longer_migration(self, execute_command: Mock) -> None:
         execute_command.side_effect = self.wait_for_lock(wait_lock, indicator_lock)
         response = self.migration_request("migrate")
         self.assert_status_code(response, 200)
+        indicator_lock.acquire()
         assert response.json["status"] == MigrationState.MIGRATION_RUNNING
         assert response.json["output"] == "start\n"
+        indicator_lock.release()
 
         indicator_lock.acquire()
         response = self.migration_request("progress")