diff --git a/tests/common/plugins/conditional_mark/tests_mark_conditions.yaml b/tests/common/plugins/conditional_mark/tests_mark_conditions.yaml
index e076ed80c28..1dd424ff003 100644
--- a/tests/common/plugins/conditional_mark/tests_mark_conditions.yaml
+++ b/tests/common/plugins/conditional_mark/tests_mark_conditions.yaml
@@ -2537,6 +2537,7 @@ generic_config_updater/test_bgp_prefix.py::test_bgp_prefix_tc1_suite:
     conditions:
       - "platform in ['x86_64-8122_64eh_o-r0', 'x86_64-8122_64ehf_o-r0']"
       - "asic_type in ['vs'] and https://github.com/sonic-net/sonic-mgmt/issues/18445"
+      - "'isolated' in topo_name"
 
 generic_config_updater/test_bgp_speaker.py::test_bgp_speaker_tc1_test_config:
   xfail: