diff --git a/x-pack/test/functional/apps/grok_debugger/grok_debugger.js b/x-pack/test/functional/apps/grok_debugger/grok_debugger.js
index 0cd00c55ea1bb..77753641916f6 100644
--- a/x-pack/test/functional/apps/grok_debugger/grok_debugger.js
+++ b/x-pack/test/functional/apps/grok_debugger/grok_debugger.js
@@ -11,7 +11,8 @@ export default function ({ getService, getPageObjects }) {
   const esArchiver = getService('esArchiver');
 
   const PageObjects = getPageObjects(['grokDebugger']);
-  describe('grok debugger app', function () {
+  // FLAKY: https://github.com/elastic/kibana/issues/84440
+  describe.skip('grok debugger app', function () {
     this.tags('includeFirefox');
     before(async () => {
       await esArchiver.load('empty_kibana');