diff --git a/applications/chatops/slack-bot/src/shared/slack-client.ts b/applications/chatops/slack-bot/src/shared/slack-client.ts
index e44c565..84ff40b 100644
--- a/applications/chatops/slack-bot/src/shared/slack-client.ts
+++ b/applications/chatops/slack-bot/src/shared/slack-client.ts
@@ -13,7 +13,8 @@ export async function sendSlackResponse(
 
     // Skip Slack API call for performance test mock URL
     // Performance tests use special URL to avoid 404 errors
-    if (responseUrl.includes('/test/perf-test-mock')) {
+    // Use startsWith to prevent matching legitimate Slack URLs that might contain this substring
+    if (responseUrl.startsWith('https://hooks.slack.com/test/perf-test-mock')) {
       logger.info('Slack response skipped (performance test mode)', {
         responseType: response.response_type
       });