Bump the validator version used for suite sanity checks.

And fix skipping regex format validation and the case where
dynamicRef blows up.

(The latter hopefully being temporary, but just so the PR passes)

bin/jsonschema_suite

@@ -224,11 +224,18 @@ class SanityTests(unittest.TestCase):
 
             Validator = VALIDATORS.get(version.name)
             if Validator is not None:
+                # Valid (optional test) schemas contain regexes which
+                # aren't valid Python regexes, so skip checking it
+                Validator.FORMAT_CHECKER.checkers.pop("regex", None)
+
                 test_files = collect(version)
                 for case in cases(test_files):
                     with self.subTest(case=case):
                         try:
-                            Validator.check_schema(case["schema"])
+                            Validator.check_schema(
+                                case["schema"],
+                                format_checker=Validator.FORMAT_CHECKER,
+                            )
                         except jsonschema.SchemaError:
                             self.fail(
                                 "Found an invalid schema. "
@@ -262,6 +269,9 @@ class SanityTests(unittest.TestCase):
             with self.subTest(path=path):
                 try:
                     validator.validate(cases)
+                except jsonschema.exceptions.RefResolutionError as error:
+                    # python-jsonschema/jsonschema#884
+                    pass
                 except jsonschema.ValidationError as error:
                     self.fail(str(error))
 

tox.ini

@@ -5,5 +5,5 @@ skipsdist = True
 
 [testenv:sanity]
 # used just for validating the structure of the test case files themselves
-deps = jsonschema==4.6.1
+deps = jsonschema==4.17.3
 commands = {envpython} bin/jsonschema_suite check