diff --git a/test/services/NotificationServiceTests.test.ts b/test/services/NotificationServiceTests.test.ts
index 53d7423..3cd2978 100644
--- a/test/services/NotificationServiceTests.test.ts
+++ b/test/services/NotificationServiceTests.test.ts
@@ -76,19 +76,26 @@ describe("NotificationService", () => {
       updateGlobalFetchMockJson({});
 
       // Act
-      const notificationData = {
+      const notificationData1 = {
         deviceId: "1",
         shuttleId: eta.shuttleId,
         stopId: eta.stopId,
       }
-      await notificationService.scheduleNotification(notificationData);
+      const notificationData2 = {
+        ...notificationData1,
+        deviceId: "2",
+      }
+      await notificationService.scheduleNotification(notificationData1);
+      await notificationService.scheduleNotification(notificationData2);
       await repository.addOrUpdateEta(eta);
 
       // Assert
       expect(fetch as jest.Mock).toHaveBeenCalledTimes(1);
-      const isNotificationScheduled = notificationService.isNotificationScheduled(notificationData);
+      const isFirstNotificationScheduled = notificationService.isNotificationScheduled(notificationData1);
+      const isSecondNotificationScheduled = notificationService.isNotificationScheduled(notificationData2);
       // No longer scheduled after being sent
-      expect(isNotificationScheduled).toBe(false);
+      expect(isFirstNotificationScheduled).toBe(false);
+      expect(isSecondNotificationScheduled).toBe(false);
     });
 
     it("leaves notification in array if delivery unsuccessful", async () => {