diff --git a/openvidu-testapp/src/app/components/openvidu-instance/openvidu-instance.component.ts b/openvidu-testapp/src/app/components/openvidu-instance/openvidu-instance.component.ts
index e0580996..f3e6c923 100644
--- a/openvidu-testapp/src/app/components/openvidu-instance/openvidu-instance.component.ts
+++ b/openvidu-testapp/src/app/components/openvidu-instance/openvidu-instance.component.ts
@@ -261,7 +261,7 @@ export class OpenviduInstanceComponent {
       this.room?.removeAllListeners(RoomEvent.Disconnected);
       if (this.roomEvents.get(RoomEvent.Disconnected)) {
         this.room!.on(RoomEvent.Disconnected, (reason?: DisconnectReason) => {
-          this.updateEventList(RoomEvent.Disconnected, {}, `Reason: ${reason}`);
+          this.updateEventList(RoomEvent.Disconnected, {}, `Reason: ${reason ? DisconnectReason[reason] : reason}`);
         });
       }
     }
@@ -422,7 +422,7 @@ export class OpenviduInstanceComponent {
             this.updateEventList(
               RoomEvent.TrackSubscriptionFailed,
               { trackSid, participant },
-              `${participant.identity} (${trackSid}). Reason: ${reason}`
+              `${participant.identity} (${trackSid}). Reason: ${reason ? SubscriptionError[reason] : reason}`
             );
           }
         );
diff --git a/openvidu-testapp/src/app/components/participant/participant.component.ts b/openvidu-testapp/src/app/components/participant/participant.component.ts
index caa22360..d87e1980 100644
--- a/openvidu-testapp/src/app/components/participant/participant.component.ts
+++ b/openvidu-testapp/src/app/components/participant/participant.component.ts
@@ -229,7 +229,9 @@ export class ParticipantComponent {
             ParticipantEvent.TrackSubscriptionFailed,
             'ParticipantEvent',
             { trackSid, reason },
-            trackSid + ' . Reason: ' + reason
+            trackSid +
+              ' . Reason: ' +
+              (reason ? SubscriptionError[reason] : reason)
           );
         }
       )