diff --git a/src/testdir/test_gui.vim b/src/testdir/test_gui.vim
index d53750f..eefebff 100644
--- a/src/testdir/test_gui.vim
+++ b/src/testdir/test_gui.vim
@@ -1706,6 +1706,7 @@
 func Test_gui_lowlevel_keyevent()
   CheckMSWindows
   new
+  let g:test_is_flaky = 1
 
   " Test for <Ctrl-A> to <Ctrl-Z> keys
   for kc in range(65, 90)