diff --git a/src/index.test.ts b/src/index.test.ts
index 2d73329..f4406b6 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -38,4 +38,13 @@ describe("GET /:number", () => {
 		const {square_root } = response.body;
 		assert.deepStrictEqual(square_root, expectedResponse);
 	});
+
+	it("should return a custom response if the number is 10", async () => {
+		const number = 10;
+		const expectedResponse = { squareRoot: "Banana" };
+
+		const response = await request(app).get(`/${number}`).expect(200);
+
+		assert.deepStrictEqual(response.body, expectedResponse);
+	});
 });
diff --git a/src/server.ts b/src/server.ts
index cf9518a..eeb8e58 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -10,6 +10,10 @@ app.get("/:number", (req, res) => {
 		return res.status(400).send({ error: "Please provide a valid number" });
 	}
 
+	if (number === 10) {
+		return res.json({squareRoot: 'Banana' });
+	}
+
 	const squareRoot = Math.sqrt(number);
 	res.json({ square_root: squareRoot });
 });