diff --git a/test/old/testdir/test_zip_plugin.vim b/test/old/testdir/test_zip_plugin.vim
index 741e4ed91f..b214516e05 100644
--- a/test/old/testdir/test_zip_plugin.vim
+++ b/test/old/testdir/test_zip_plugin.vim
@@ -10,8 +10,6 @@ endif
 runtime plugin/zipPlugin.vim
 
 func Test_zip_basic()
-  let _sl = &shellslash
-  set noshellslash
 
   "## get our zip file
   if !filecopy("samples/test.zip", "X.zip")
@@ -134,6 +132,4 @@ func Test_zip_basic()
 
   bw
 
-  let &shellslash = _sl
-
 endfunc