1 files changed, 11 insertions, 0 deletions
diff --git a/test/functional/legacy/fnamemodify_spec.lua b/test/functional/legacy/fnamemodify_spec.lua
index a439e91b6f..2a32aea127 100644
--- a/test/functional/legacy/fnamemodify_spec.lua
+++ b/test/functional/legacy/fnamemodify_spec.lua
@@ -54,6 +54,12 @@ describe('filename modifiers', function()
         set shell=tcsh
         call assert_equal("'abc\\\ndef'", fnamemodify("abc\ndef", ':S'))
       endfunc
+
+      func Test_expand()
+        new
+        call assert_equal("", expand('%:S'))
+        quit
+      endfunc
     ]=])
   end)
 
@@ -61,4 +67,9 @@ describe('filename modifiers', function()
     call('Test_fnamemodify')
     expected_empty()
   end)
+
+  it('works for :S in an unnamed buffer', function()
+    call('Test_expand')
+    expected_empty()
+  end)
 end)