diff --git a/test/loaders/ApiBasedRepositoryLoaderTests.test.ts b/test/loaders/ApiBasedRepositoryLoaderTests.test.ts
index 90cb41f..ea34042 100644
--- a/test/loaders/ApiBasedRepositoryLoaderTests.test.ts
+++ b/test/loaders/ApiBasedRepositoryLoaderTests.test.ts
@@ -9,6 +9,9 @@ import {
 } from "../jsonSnapshots/fetchStopAndPolylineData/fetchStopAndPolylineDataSuccessfulResponse";
 import { generateMockStops, generateMockSystems } from "../generators";
 import { IStop } from "../../src/entities/entities";
+import {
+  fetchShuttleDataSuccessfulResponse
+} from "../jsonSnapshots/fetchShuttleData/fetchShuttleDataSuccessfulResponse";
 
 /**
  * Function to update behavior of the global `fetch` function.
@@ -197,7 +200,14 @@ describe("ApiBasedRepositoryLoader", () => {
 
   describe("fetchAndUpdateShuttleDataForSystemId", () => {
     it("updates shuttle data in repository if response received", async () => {
+      updateGlobalFetchMockJson(fetchShuttleDataSuccessfulResponse);
+      const busesInResponse = Object.values(fetchShuttleDataSuccessfulResponse.buses);
 
+      await loader.fetchAndUpdateShuttleDataForSystemId("263");
+
+      const shuttles = await loader.repository.getShuttlesBySystemId("263");
+
+      expect(shuttles.length).toEqual(busesInResponse.length);
     });
 
     it("throws the correct error if the API response contains no data", async () => {