diff --git a/api/tests/helpers/series-helper.ts b/api/tests/helpers/series-helper.ts
index 8ff3580d..bbdd6171 100644
--- a/api/tests/helpers/series-helper.ts
+++ b/api/tests/helpers/series-helper.ts
@@ -73,3 +73,38 @@ export const getEntries = async (
 	const body = await resp.json();
 	return [resp, body] as const;
 };
+
+export const getExtras = async (
+	serie: string,
+	opts: {
+		filter?: string;
+		limit?: number;
+		after?: string;
+		sort?: string | string[];
+		query?: string;
+	},
+) => {
+	const resp = await app.handle(
+		new Request(buildUrl(`series/${serie}/extras`, opts), {
+			method: "GET",
+		}),
+	);
+	const body = await resp.json();
+	return [resp, body] as const;
+};
+
+export const getUnknowns = async (opts: {
+	filter?: string;
+	limit?: number;
+	after?: string;
+	sort?: string | string[];
+	query?: string;
+}) => {
+	const resp = await app.handle(
+		new Request(buildUrl(`unknowns`, opts), {
+			method: "GET",
+		}),
+	);
+	const body = await resp.json();
+	return [resp, body] as const;
+};
diff --git a/api/tests/series/get-entries.test.ts b/api/tests/series/get-entries.test.ts
index ae70e1f8..5384cde4 100644
--- a/api/tests/series/get-entries.test.ts
+++ b/api/tests/series/get-entries.test.ts
@@ -1,5 +1,5 @@
 import { beforeAll, describe, expect, it } from "bun:test";
-import { getEntries } from "tests/helpers";
+import { getEntries, getExtras } from "tests/helpers";
 import { expectStatus } from "tests/utils";
 import { seedSerie } from "~/controllers/seed/series";
 import { madeInAbyss } from "~/models/examples";
@@ -28,3 +28,21 @@ describe("Get entries", () => {
 		expect(body.items).toBeArrayOfSize(madeInAbyss.entries.length);
 	});
 });
+
+describe("Get extra", () => {
+	it("Invalid slug", async () => {
+		const [resp, body] = await getExtras("sotneuhn", {});
+
+		expectStatus(resp, body).toBe(404);
+		expect(body).toMatchObject({
+			status: 404,
+			message: expect.any(String),
+		});
+	});
+	it("Default sort order", async () => {
+		const [resp, body] = await getExtras(madeInAbyss.slug, {});
+
+		expectStatus(resp, body).toBe(200);
+		expect(body.items).toBeArrayOfSize(madeInAbyss.extras.length);
+	});
+});