diff --git a/test/repositories/UnoptimizedInMemoryRepositoryTests.test.ts b/test/repositories/UnoptimizedInMemoryRepositoryTests.test.ts
index 4a70771..a997b7c 100644
--- a/test/repositories/UnoptimizedInMemoryRepositoryTests.test.ts
+++ b/test/repositories/UnoptimizedInMemoryRepositoryTests.test.ts
@@ -444,26 +444,101 @@ describe("UnoptimizedInMemoryRepository", () => {
   });
 
   describe("clearSystemData", () => {
+    test("clears all systems from the repository", async () => {
+      const system1 = { id: "sys1", name: "System A" };
+      const system2 = { id: "sys2", name: "System B" };
 
+      await repository.addOrUpdateSystem(system1);
+      await repository.addOrUpdateSystem(system2);
+
+      await repository.clearSystemData();
+
+      const result = await repository.getSystems();
+      expect(result).toEqual([]);
+    });
+
+    test("clears system data when the repository has data", async () => {
+      const system = { id: "sys1", name: "System A" };
+      await repository.addOrUpdateSystem(system);
+
+      await repository.clearSystemData();
+
+      const result = await repository.getSystems();
+      expect(result).toEqual([]);
+    });
   });
 
   describe("clearShuttleData", () => {
+    test("clears all shuttles from the repository", async () => {
+      const shuttle1 = { id: "shuttle1", name: "Shuttle A", systemId: "sys1", routeId: "route1", coordinates: { latitude: 10, longitude: 20 } };
+      const shuttle2 = { id: "shuttle2", name: "Shuttle B", systemId: "sys2", routeId: "route2", coordinates: { latitude: 15, longitude: 25 } };
+      await repository.addOrUpdateShuttle(shuttle1);
+      await repository.addOrUpdateShuttle(shuttle2);
 
+      await repository.clearShuttleData();
+
+      const result = await repository.getShuttlesBySystemId("sys1");
+      expect(result).toEqual([]);
+    });
   });
 
   describe("clearEtaData", () => {
+    test("clears all ETAs from the repository", async () => {
+      const eta1 = { shuttleId: "shuttle1", stopId: "stop1", secondsRemaining: 120 };
+      const eta2 = { shuttleId: "shuttle2", stopId: "stop2", secondsRemaining: 150 };
 
+      await repository.addOrUpdateEta(eta1);
+      await repository.addOrUpdateEta(eta2);
+
+      await repository.clearEtaData();
+
+      const result = await repository.getEtasForShuttleId("shuttle1");
+      expect(result).toEqual([]);
+    });
   });
 
   describe("clearOrderedStopData", () => {
+    test("clears all ordered stops from the repository", async () => {
+      const orderedStop1 = { routeId: "route1", stopId: "stop1", position: 1 };
+      const orderedStop2 = { routeId: "route2", stopId: "stop2", position: 2 };
 
+      await repository.addOrUpdateOrderedStop(orderedStop1);
+      await repository.addOrUpdateOrderedStop(orderedStop2);
+
+      await repository.clearOrderedStopData();
+
+      const result = await repository.getOrderedStopsByRouteId("route1");
+      expect(result).toEqual([]);
+    });
   });
 
   describe("clearRouteData", () => {
+    test("clears all routes from the repository", async () => {
+      const route1 = { id: "route1", name: "Route 1", systemId: "sys1", color: "#ffffff", polylineCoordinates: [] };
+      const route2 = { id: "route2", name: "Route 2", systemId: "sys2", color: "#ffffff", polylineCoordinates: [] };
 
+      await repository.addOrUpdateRoute(route1);
+      await repository.addOrUpdateRoute(route2);
+
+      await repository.clearRouteData();
+
+      const result = await repository.getRoutesBySystemId("sys1");
+      expect(result).toEqual([]);
+    });
   });
 
   describe("clearStopData", () => {
+    test("clears all stops from the repository", async () => {
+      const stop1 = { id: "stop1", name: "Stop A", systemId: "sys1", coordinates: { latitude: 10, longitude: 20 } };
+      const stop2 = { id: "stop2", name: "Stop B", systemId: "sys2", coordinates: { latitude: 10, longitude: 20 } };
 
+      await repository.addOrUpdateStop(stop1);
+      await repository.addOrUpdateStop(stop2);
+
+      await repository.clearStopData();
+
+      const result = await repository.getStopsBySystemId("sys1");
+      expect(result).toEqual([]);
+    });
   });
 });
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