diff --git a/x-pack/test/security_api_integration/tests/session_idle/cleanup.ts b/x-pack/test/security_api_integration/tests/session_idle/cleanup.ts
index 02e2926e8a906..1668d9bc1b811 100644
--- a/x-pack/test/security_api_integration/tests/session_idle/cleanup.ts
+++ b/x-pack/test/security_api_integration/tests/session_idle/cleanup.ts
@@ -76,7 +76,8 @@ export default function ({ getService }: FtrProviderContext) {
     return cookie;
   }
 
-  describe('Session Idle cleanup', () => {
+  // FLAKY: https://github.com/elastic/kibana/issues/121482
+  describe.skip('Session Idle cleanup', () => {
     beforeEach(async () => {
       await es.cluster.health({ index: '.kibana_security_session*', wait_for_status: 'green' });
       await esDeleteAllIndices('.kibana_security_session*');