WIP: fix schema test assumed error message

tests/integration/test_schema.py

@@ -2273,8 +2273,7 @@ async def test_invalid_namespace(registry_async_client: Client) -> None:
     json_res = res.json()
     assert json_res["error_code"] == 42201, json_res
     expected_message = (
-        "Invalid AVRO schema. Error: foo-bar-baz is not a valid Avro name because it does not match the pattern "
-        "(?:^|\\.)[A-Za-z_][A-Za-z0-9_]*$"
+        "foo-bar-baz is not a valid Avro name because it does not match the pattern (?:^|\\.)[A-Za-z_][A-Za-z0-9_]*$"
     )
     assert json_res["message"] == expected_message, json_res
 
@@ -2883,34 +2882,28 @@ async def test_invalid_schema_should_provide_good_error_messages(registry_async_
         f"subjects/{test_subject}/versions",
         json={"schema": schema_str[:-1]},
     )
-    assert res.json()["message"] == "Invalid AVRO schema. Error: Expecting ',' delimiter: line 1 column 18 (char 17)"
+    assert res.json()["message"] == "Expecting ',' delimiter: line 1 column 18 (char 17)"
 
     # Unfortunately the AVRO library doesn't provide a good error message, it just raises an TypeError
     schema_str = json.dumps({"type": "enum", "name": "error"})
     res = await registry_async_client.post(
         f"subjects/{test_subject}/versions",
         json={"schema": schema_str},
     )
-    assert (
-        res.json()["message"]
-        == "Invalid AVRO schema. Error: Enum symbols must be a sequence of strings, but it is <class 'NoneType'>"
-    )
+    assert res.json()["message"] == "Enum symbols must be a sequence of strings, but it is <class 'NoneType'>"
 
     # This is an upstream bug in the python AVRO library, until the bug is fixed we should at least have a nice error message
     schema_str = json.dumps({"type": "enum", "name": "error", "symbols": {}})
     res = await registry_async_client.post(
         f"subjects/{test_subject}/versions",
         json={"schema": schema_str},
     )
-    assert (
-        res.json()["message"]
-        == "Invalid AVRO schema. Error: Enum symbols must be a sequence of strings, but it is <class 'dict'>"
-    )
+    assert res.json()["message"] == "Enum symbols must be a sequence of strings, but it is <class 'dict'>"
 
     # This is an upstream bug in the python AVRO library, until the bug is fixed we should at least have a nice error message
     schema_str = json.dumps({"type": "enum", "name": "error", "symbols": ["A", "B"]})
     res = await registry_async_client.post(
         f"subjects/{test_subject}/versions",
         json={"schema": schema_str},
     )
-    assert res.json()["message"] == "Invalid AVRO schema. Error: error is a reserved type name."
+    assert res.json()["message"] == "error is a reserved type name."