diff --git a/test/ros_tests/config.json b/test/ros_tests/config.json
index 071bceff20..5231860d9a 100644
--- a/test/ros_tests/config.json
+++ b/test/ros_tests/config.json
@@ -1,6 +1,7 @@
 {
     "mode": "sitl",
     "simulator": "gazebo",
+    "model_prefix": "gazebo-classic_",
     "tests":
     [
         {