diff --git a/src/testdir/test_mapping.vim b/src/testdir/test_mapping.vim
index 7fdbdf6..e0008d6 100644
--- a/src/testdir/test_mapping.vim
+++ b/src/testdir/test_mapping.vim
@@ -1627,4 +1627,15 @@
   set mouse&
 endfunc
 
+func Test_unmap_simplfied()
+  map <C-I> foo
+  map <Tab> bar
+  call assert_equal('foo', maparg('<C-I>'))
+  call assert_equal('bar', maparg('<Tab>'))
+  unmap <C-I>
+  call assert_equal('', maparg('<C-I>'))
+  call assert_equal('bar', maparg('<Tab>'))
+  unmap <Tab>
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab