diff --git a/backend/tests/test_booking.py b/backend/tests/test_booking.py
index d06c921..e77b62a 100644
--- a/backend/tests/test_booking.py
+++ b/backend/tests/test_booking.py
@@ -299,7 +299,7 @@ class TestCreateBooking:
             )
         
         assert response.status_code == 400
-        assert "not within available" in response.json()["detail"]
+        assert "not within any available time ranges" in response.json()["detail"]
 
 
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