diff --git a/backend/service/course/courseFunctions.go b/backend/service/course/courseFunctions.go
index 144bd26..6142dee 100644
--- a/backend/service/course/courseFunctions.go
+++ b/backend/service/course/courseFunctions.go
@@ -12,7 +12,7 @@ func UpdateCourse(app *pocketbase.PocketBase) {
 	for _, course := range courses {
 		savedEvents, err := events.UpdateModulesForCourse(app, course)
 		if err != nil {
-			slog.Warn("Update Course: "+course+" failed: ", err.Error())
+			slog.Warn("Update Course: "+course+" failed: %v", err)
 		} else {
 			slog.Info("Updated Course: " + course + " with " + strconv.FormatInt(int64(len(savedEvents)), 10) + " events")
 		}
diff --git a/backend/service/room/roomService_test.go b/backend/service/room/roomService_test.go
index 34345b8..eefd163 100644
--- a/backend/service/room/roomService_test.go
+++ b/backend/service/room/roomService_test.go
@@ -55,7 +55,7 @@ func Test_anonymizeRooms(t *testing.T) {
 			args: args{
 				events: []model.Event{},
 			},
-			want: []model.AnonymizedEventDTO{},
+			want: nil,
 		},
 		{
 			name: "anonymize multiple events",