diff --git a/src/testdir/test_filechanged.vim b/src/testdir/test_filechanged.vim
index 43f752d..ce78609 100644
--- a/src/testdir/test_filechanged.vim
+++ b/src/testdir/test_filechanged.vim
@@ -86,6 +86,7 @@
 
   au! testreload
   bwipe!
+  call delete(undofile('Xchanged_r'))
   call delete('Xchanged_r')
 endfunc