1 files changed, 8 insertions, 0 deletions
diff --git a/test/functional/api/highlight_spec.lua b/test/functional/api/highlight_spec.lua
index 2730f7e23d..541ac0ab63 100644
--- a/test/functional/api/highlight_spec.lua
+++ b/test/functional/api/highlight_spec.lua
@@ -11,6 +11,9 @@ local ok = helpers.ok
 local assert_alive = helpers.assert_alive
 
 describe('API: highlight',function()
+  clear()
+  Screen.new() -- initialize Screen.colors
+
   local expected_rgb = {
     background = Screen.colors.Yellow,
     foreground = Screen.colors.Red,
@@ -354,4 +357,9 @@ describe("API: set highlight", function()
     meths.set_hl(0, 'Normal', {fg='#000083', bg='#0000F3'})
     eq({foreground = 131, background = 243}, nvim("get_hl_by_name", 'Normal', true))
   end)
+
+  it('does not segfault on invalid group name #20009', function()
+    eq('Invalid highlight name: foo bar', pcall_err(meths.set_hl, 0, 'foo bar', {bold = true}))
+    assert_alive()
+  end)
 end)