I guess there's not really a saner thing to do here.

2 files changed, 19 insertions, 3 deletions

diff --git a/jsonschema/tests/test_validators.py b/jsonschema/tests/test_validators.py
index 6512677..2eeada4 100644
--- a/jsonschema/tests/test_validators.py
+++ b/jsonschema/tests/test_validators.py
@@ -964,6 +964,18 @@ class TestValidatorFor(TestCase):
             validators.Draft6Validator,
         )
 
+    def test_True(self):
+        self.assertIs(
+            validators.validator_for(True),
+            validators._LATEST_VERSION,
+        )
+
+    def test_False(self):
+        self.assertIs(
+            validators.validator_for(False),
+            validators._LATEST_VERSION,
+        )
+
     def test_custom_validator(self):
         Validator = validators.create(
             meta_schema={"id": "meta schema id"},
@@ -976,7 +988,7 @@ class TestValidatorFor(TestCase):
         )
 
     def test_validator_for_jsonschema_default(self):
-        self.assertIs(validators.validator_for({}), validators.Draft6Validator)
+        self.assertIs(validators.validator_for({}), validators._LATEST_VERSION)
 
     def test_validator_for_custom_default(self):
         self.assertIs(validators.validator_for({}, default=None), None)
diff --git a/jsonschema/validators.py b/jsonschema/validators.py
index 4ff551d..d975a76 100644
--- a/jsonschema/validators.py
+++ b/jsonschema/validators.py
@@ -494,6 +494,8 @@ Draft6Validator = create(
     version="draft6",
 )
 
+_LATEST_VERSION = Draft6Validator
+
 
 class RefResolver(object):
     """
@@ -820,7 +822,7 @@ def validate(instance, schema, cls=None, *args, **kwargs):
     cls(schema, *args, **kwargs).validate(instance)
 
 
-def validator_for(schema, default=Draft6Validator):
+def validator_for(schema, default=_LATEST_VERSION):
     """
     Retrieve the validator class appropriate for validating the given schema.
 
@@ -839,6 +841,8 @@ def validator_for(schema, default=Draft6Validator):
             determined.
 
             If unprovided, the default is to return
-            `jsonschema.Draft6Validator`.
+            the latest supported draft.
     """
+    if schema is True or schema is False:
+        return default
     return meta_schemas.get(schema.get(u"$schema", u""), default)