diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
index 460a569..d8f033e 100644
--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -344,7 +344,7 @@
   for var in  ['$TEMPDIR', '$TMP', '$TEMP']
     if exists(var)
       let varvalue = substitute(expand(var), '\\', '/', 'g')
-      call assert_match(varvalue . '.\*', bskvalue)
+      call assert_match(varvalue . '/\=\*', bskvalue)
     endif
   endfor
 endfunc