diff --git a/src/testdir/test_vimscript.vim b/src/testdir/test_vimscript.vim
index a23bac3..5599754 100644
--- a/src/testdir/test_vimscript.vim
+++ b/src/testdir/test_vimscript.vim
@@ -5977,6 +5977,9 @@
 
 " interrupt right before a catch is invoked in a script
 func Test_ignore_catch_after_intr_1()
+  " for unknown reasons this test sometimes fails on MS-Windows.
+  let g:test_is_flaky = 1
+
   XpathINIT
   let lines =<< trim [CODE]
     try