From b38a010563b2203cd9ec1d2217b31f17205d01df Mon Sep 17 00:00:00 2001
From: Julian Berman <Julian@GrayVines.com>
Date: Sat, 16 Feb 2019 11:36:46 -0500
Subject: At least a failing test.

---
 jsonschema/tests/test_validators.py | 33 ++++++++++++++++++++++++++++++++-
 jsonschema/validators.py            |  6 ++++--
 2 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/jsonschema/tests/test_validators.py b/jsonschema/tests/test_validators.py
index f8f982c..8af568d 100644
--- a/jsonschema/tests/test_validators.py
+++ b/jsonschema/tests/test_validators.py
@@ -179,7 +179,38 @@ class TestLegacyTypeChecking(SynchronousTestCase):
                 u"integer",
                 u"null",
                 u"number",
-                u"object", u"string",
+                u"object",
+                u"string",
+            },
+        )
+        self.flushWarnings()
+
+    def test_default_types_with_provided_custom_type_checker(self):
+        type_checker = TypeChecker(
+            {
+                u"Here": lambda foo: False,
+                u"we": lambda foo: False,
+                u"go": lambda foo: False,
+                u"mistaking": lambda foo: False,
+                u"clouds": lambda foo: False,
+                u"for": lambda foo: False,
+                u"mountains": lambda foo: False,
+            },
+        )
+        Validator = validators.create(
+            meta_schema={},
+            validators=(),
+            type_checker=type_checker,
+        )
+        self.assertEqual(
+            set(Validator.DEFAULT_TYPES), {
+                u"Here",
+                u"we",
+                u"go",
+                u"mistaking",
+                u"clouds",
+                u"for",
+                u"mountains",
             },
         )
         self.flushWarnings()
diff --git a/jsonschema/validators.py b/jsonschema/validators.py
index 650b5d1..4ad8992 100644
--- a/jsonschema/validators.py
+++ b/jsonschema/validators.py
@@ -213,12 +213,14 @@ def create(
             type_checkers=_generate_legacy_type_checks(default_types),
         )
     else:
-        default_types = _DEPRECATED_DEFAULT_TYPES
         _created_with_default_types = False
         if type_checker is None:
             type_checker = _types.TypeChecker(
-                type_checkers=_generate_legacy_type_checks(default_types),
+                type_checkers=_generate_legacy_type_checks(
+                    _DEPRECATED_DEFAULT_TYPES,
+                ),
             )
+        default_types = type_checker._type_checkers
 
     @add_metaclass(_DefaultTypesDeprecatingMetaClass)
     class Validator(object):
-- 
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