diff --git a/src/testdir/test_vimscript.vim b/src/testdir/test_vimscript.vim
index 0c4aedb..c135304 100644
--- a/src/testdir/test_vimscript.vim
+++ b/src/testdir/test_vimscript.vim
@@ -7509,6 +7509,13 @@
     let res ..= c .. '-'
   endfor
   call assert_equal('', res)
+
+  " Test for ignoring loop var assignment
+  let c = 0
+  for _ in 'abc'
+    let c += 1
+  endfor
+  call assert_equal(3, c)
 endfunc
 
 " Test for deeply nested :source command  {{{1