after merge fixes

tests/integration/test_json_references.py

@@ -202,7 +202,10 @@ async def test_json_references_compatibility(registry_async_client: Client) -> N
         },
     )
     assert res.status_code == 200
-    assert res.json() == {"is_compatible": False}
+    assert res.json() == {
+        "is_compatible": False,
+        "messages": ["type Instance.STRING is not compatible with type Instance.INTEGER"],
+    }
 
 
 async def test_json_incompatible_name_references(registry_async_client: Client) -> None:
@@ -218,9 +221,9 @@ async def test_json_incompatible_name_references(registry_async_client: Client)
     )
     assert res.status_code == 409
     msg = (
-        "Incompatible schema, compatibility_mode=BACKWARD Restricting acceptable values of properties is an "
-        "incompatible change. The following properties street2 accepted any value because of the lack of "
-        "validation (the object schema had neither patternProperties nor additionalProperties), now these values "
-        "are restricted."
+        "Incompatible schema, compatibility_mode=BACKWARD. Incompatibilities: Restricting acceptable values of "
+        "properties is an incompatible change. The following properties street2 accepted any value because of the "
+        "lack of validation (the object schema had neither patternProperties nor additionalProperties), "
+        "now these values are restricted."
     )
     assert res.json()["message"] == msg