diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index 027700b..1352eaa 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -705,6 +705,15 @@
   set complete&
 endfunc
 
+func Test_append()
+  enew!
+  split
+  call append(0, ["foo"])
+  split
+  only
+  undo
+endfunc
+
 func Test_getbufvar()
   let bnr = bufnr('%')
   let b:var_num = '1234'