diff --git a/src/testdir/test_system.vim b/src/testdir/test_system.vim
index f238139..879eaed 100644
--- a/src/testdir/test_system.vim
+++ b/src/testdir/test_system.vim
@@ -55,7 +55,7 @@
     let cmd = ' -es -c "source Xscript" +q; echo "result=$?"'
     " Need to put this in a script, "catch" isn't found after an unknown
     " function.
-    call writefile(['try', 'call doesnotexist()', 'catch', 'endtry'], 'Xscript')
+    call writefile(['try', 'call doesnotexist()', 'catch', 'endtry'], 'Xscript', 'D')
     let a = system(GetVimCommand() . cmd)
     call assert_match('result=0', a)
     call assert_equal(0, v:shell_error)
@@ -71,7 +71,6 @@
   let cmd = ' -es -c "source Xscript" +q'
   let a = system(GetVimCommand() . cmd)
   call assert_notequal(0, v:shell_error)
-  call delete('Xscript')
 
   if has('unix') " echo $? only works on Unix
     let cmd = ' -es -c "call doesnotexist()" +q; echo $?'