diff --git a/test/cookie-consent.test.js b/test/cookie-consent.test.js
new file mode 100644
index 0000000..b6a5d1e
--- /dev/null
+++ b/test/cookie-consent.test.js
@@ -0,0 +1,24 @@
+import CookieConsent from "../src/cookie-consent";
+
+describe("CookieConsent", () => {
+  const FOO = { id: "foo", accepted: true };
+  const BAR = { id: "bar", accepted: false };
+  const COOKIES = [FOO, BAR];
+
+  window.customElements.define("cookie-consent", CookieConsent);
+
+  const cookieConsent = document.createElement("cookie-consent");
+
+  cookieConsent.cookies = COOKIES;
+
+  test("updatePreference", () => {
+    const input = [
+      { id: "foo", accepted: false },
+      { id: "bar", accepted: true },
+    ];
+
+    cookieConsent.updatePreference(input);
+
+    expect(cookieConsent.preferences.getAll("foo")).toEqual(input);
+  });
+});