diff --git a/src/services/NotificationService.ts b/src/services/NotificationService.ts
index ea92c59..8eacaa9 100644
--- a/src/services/NotificationService.ts
+++ b/src/services/NotificationService.ts
@@ -11,7 +11,11 @@ interface ScheduledNotificationData {
 
 export class NotificationService {
   private token: string | undefined = undefined;
-  private lastRefreshedTimeMs: number | undefined = undefined;
+
+  private _lastRefreshedTimeMs: number | undefined = undefined;
+  get lastRefreshedTimeMs() {
+    return this._lastRefreshedTimeMs;
+  }
 
   constructor(private repository: GetterRepository) {}
 
@@ -47,7 +51,7 @@ export class NotificationService {
 
   private lastReloadedTimeForAPNsIsTooRecent() {
     const thirtyMinutesMs = 1800000;
-    return this.lastRefreshedTimeMs && Date.now() - this.lastRefreshedTimeMs < thirtyMinutesMs;
+    return this._lastRefreshedTimeMs && Date.now() - this._lastRefreshedTimeMs < thirtyMinutesMs;
   }
 
   public async scheduleNotification({ deviceId, shuttleId, stopId }: ScheduledNotificationData) {