==================================================== FAILURES ====================================================
___________________ TestSpecValidatorIterErrors.test_parameter_custom_format_checker_not_found ___________________

self = <test_exceptions.TestSpecValidatorIterErrors object at 0x7f950b421d90>
validator_v30 = <Proxy at 0x7f950b6cf540 wrapping <openapi_spec_validator.validation.validators.SpecValidator object at 0x7f950bbdd190...bHandler object at 0x7f950bae7910>, 'file': <jsonschema_spec.handlers.urllib.UrllibHandler object at 0x7f950bae7890>})>

    def test_parameter_custom_format_checker_not_found(self, validator_v30):
        spec = {
            "openapi": "3.0.0",
            "info": {
                "title": "Test Api",
                "version": "0.0.1",
            },  
            "paths": {
                "/test/": {
                    "get": {
                        "responses": {
                            "default": {
                                "description": "default response",
                            },  
                        },  
                        "parameters": [
                            {
                                "name": "param1",
                                "in": "query",
                                "schema": {
                                    "type": "string",
                                    "format": "custom",
                                    "default": "customvalue",
                                },
                            },
                        ],
                    },
                },
            },
        }

        errors = validator_v30.iter_errors(spec)

        errors_list = list(errors)
>       assert len(errors_list) == 1
E       assert 0 == 1
E        +  where 0 = len([])

errors     = <generator object SpecValidator.iter_errors at 0x7f950b52b040>
errors_list = []
self       = <test_exceptions.TestSpecValidatorIterErrors object at 0x7f950b421d90>
spec       = {'info': {'title': 'Test Api', 'version': '0.0.1'}, 'openapi': '3.0.0', 'paths': {'/test/': {'get': {'parameters': [{'in': 'query', 'name': 'param1', 'schema': {...}}], 'responses': {'default': {'description': 'default response'}}}}}}
validator_v30 = <Proxy at 0x7f950b6cf540 wrapping <openapi_spec_validator.validation.validators.SpecValidator object at 0x7f950bbdd190...bHandler object at 0x7f950bae7910>, 'file': <jsonschema_spec.handlers.urllib.UrllibHandler object at 0x7f950bae7890>})>

tests/integration/validation/test_exceptions.py:457: AssertionError