diff --git a/test/functional/lua/vim_spec.lua b/test/functional/lua/vim_spec.lua
index 5ba5e88584..73e4d7ca79 100644
--- a/test/functional/lua/vim_spec.lua
+++ b/test/functional/lua/vim_spec.lua
@@ -494,6 +494,8 @@ describe('lua stdlib', function()
     eq(true, exec_lua("return vim.tbl_get({ test = { nested_test = true }}, 'test', 'nested_test')"))
     eq(NIL, exec_lua("return vim.tbl_get({ unindexable = true }, 'unindexable', 'missing_key')"))
     eq(NIL, exec_lua("return vim.tbl_get({ unindexable = 1 }, 'unindexable', 'missing_key')"))
+    eq(NIL, exec_lua("return vim.tbl_get({ unindexable = coroutine.create(function () end) }, 'unindexable', 'missing_key')"))
+    eq(NIL, exec_lua("return vim.tbl_get({ unindexable = function () end }, 'unindexable', 'missing_key')"))
     eq(NIL, exec_lua("return vim.tbl_get({}, 'missing_key')"))
     eq(NIL, exec_lua("return vim.tbl_get({})"))
   end)