diff --git a/src/testdir/test_shortpathname.vim b/src/testdir/test_shortpathname.vim
index 5964630..59361ca 100644
--- a/src/testdir/test_shortpathname.vim
+++ b/src/testdir/test_shortpathname.vim
@@ -78,6 +78,7 @@
 endfunc
 
 func Test_ColonEight_MultiByte()
+  let g:test_is_flaky = 1
   let dir = 'Xtest'
 
   let file = dir . '/日本語のファイル.txt'