From 67378bfb5ac41c77ee115745c1badf2e896ecbc6 Mon Sep 17 00:00:00 2001
From: altermo <107814000+altermo@users.noreply.github.com>
Date: Sat, 13 Jun 2026 18:49:18 +0200
Subject: [PATCH] test(undotree): flaky tests #40218

Problem:
After 400f24739728 the undotree test became flaky.

It seems to be caused by some kind of race condition where an entry in the undotree is not added when a change in the buffer happens (adding a bunch of sleep around buffer-change operations seems to fix the issue).

Solution:
Disable autoread plugin in undotree test.
---
 test/functional/plugin/undotree_spec.lua | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/test/functional/plugin/undotree_spec.lua b/test/functional/plugin/undotree_spec.lua
index b3d1336d16..c21932e58c 100644
--- a/test/functional/plugin/undotree_spec.lua
+++ b/test/functional/plugin/undotree_spec.lua
@@ -40,7 +40,14 @@ end
 
 describe(':Undotree', function()
   before_each(function()
-    clear({ args = { '--clean' } })
+    clear({
+      args = {
+        '--clean',
+        -- autoread plugin causes flaky tests
+        '--cmd',
+        'let g:loaded_autoread=1',
+      },
+    })
     exec 'packadd nvim.undotree'
   end)