This allows defining custom types

2 files changed, 6 insertions, 1 deletions

diff --git a/jsonschema/_validators.py b/jsonschema/_validators.py
index bfcd1c1..c8cf05c 100644
--- a/jsonschema/_validators.py
+++ b/jsonschema/_validators.py
@@ -215,7 +215,7 @@ def type_draft3(validator, types, instance, schema):
             if not errors:
                 return
             all_errors.extend(errors)
-        elif validator.is_type(type, "string"):
+        else:
             if validator.is_type(instance, type):
                 return
     else:
diff --git a/jsonschema/tests/test_validators.py b/jsonschema/tests/test_validators.py
index 357e388..1081ec1 100644
--- a/jsonschema/tests/test_validators.py
+++ b/jsonschema/tests/test_validators.py
@@ -655,6 +655,11 @@ class TestDraft3Validator(ValidatorTestMixin, unittest.TestCase):
         self.assertTrue(self.validator.is_type(True, "boolean"))
         self.assertTrue(self.validator.is_valid(True, {"type": "any"}))
 
+    def test_non_string_custom_types(self):
+        schema = {'type': [None]}
+        cls = self.validator_class(schema, types={None: type(None)})
+        cls.validate(None, schema)
+
 
 class TestDraft4Validator(ValidatorTestMixin, unittest.TestCase):
     validator_class = Draft4Validator