diff --git a/test/lsp-graphql-test.el b/test/lsp-graphql-test.el
new file mode 100644
index 00000000000..f597fbf9a6d
--- /dev/null
+++ b/test/lsp-graphql-test.el
@@ -0,0 +1,45 @@
+;;; lsp-graphql-test.el --- unit tests for lsp-graphql.el -*- lexical-binding: t -*-
+
+;; Copyright (C) 2024 ncaq <ncaq@ncaq.net>
+
+;; Author: ncaq <ncaq@ncaq.net>
+;; Keywords:
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;
+
+;;; Code:
+
+(require 'ert)
+(require 'lsp-graphql)
+
+(ert-deftest lsp-graphql-activate-p-based-on-file-extension ()
+  (should (lsp-graphql-activate-p "abc.ts"))
+  (should (lsp-graphql-activate-p "abc.js"))
+  (should (lsp-graphql-activate-p "abc.jsx"))
+  (should (lsp-graphql-activate-p "abc.tsx"))
+  (should (lsp-graphql-activate-p "abc.vue"))
+  (should (lsp-graphql-activate-p "abc.graphql"))
+  (should (lsp-graphql-activate-p "abc.graphqls"))
+  (should (lsp-graphql-activate-p "abc.gql"))
+  (should-not (lsp-graphql-activate-p "abc.tsxx"))
+  (should-not (lsp-graphql-activate-p "abc.jss"))
+  (should-not (lsp-graphql-activate-p "abc.tsp"))
+  (should-not (lsp-graphql-activate-p "js.hs"))
+  (should-not (lsp-graphql-activate-p "/path/to/graphql/test.go")))
+
+;;; lsp-graphql-test.el ends here