diff --git a/__tests__/utils/sluggify-string.test.js b/__tests__/utils/sluggify-string.test.js
new file mode 100644
index 00000000..6c1a7219
--- /dev/null
+++ b/__tests__/utils/sluggify-string.test.js
@@ -0,0 +1,8 @@
+import sluggifyString from "@/utils/sluggify-string"
+import { it, expect } from "vitest"
+
+it("should keep only lowercase and '-'", () => {
+  expect(sluggifyString('hél#lö (d)\'wórld "123"_456.xyz')).toBe(
+    "hello-dworld-xyz"
+  )
+})