diff --git a/pydantic/errors.py b/pydantic/errors.py
index 7e9b837..27a50d4 100644
--- a/pydantic/errors.py
+++ b/pydantic/errors.py
@@ -87,7 +87,7 @@ class UrlRegexError(PydanticValueError):
 
 class EnumError(PydanticTypeError):
     def __str__(self) -> str:
-        permitted = ', '.join(repr(v.value) for v in self.ctx['enum_type'])  # type: ignore
+        permitted = ', '.join(repr(v.value) for v in self.ctx['enum_values'])  # type: ignore
         return f'value is not a valid enumeration member; permitted: {permitted}'
 
 
diff --git a/pydantic/validators.py b/pydantic/validators.py
index a5a5136..378a532 100644
--- a/pydantic/validators.py
+++ b/pydantic/validators.py
@@ -222,7 +222,8 @@ def enum_validator(v: Any, field: 'Field', config: 'BaseConfig') -> Enum:
     try:
         enum_v = field.type_(v)
     except ValueError:
-        raise errors.EnumError(enum_type=field.type_)
+        # field.type_ should be an enum, so will be iterable
+        raise errors.EnumError(enum_values=list(field.type_))  # type: ignore
     return enum_v.value if config.use_enum_values else enum_v
 
 
diff --git a/tests/test_types.py b/tests/test_types.py
index 4a7156e..c330774 100644
--- a/tests/test_types.py
+++ b/tests/test_types.py
@@ -477,9 +477,10 @@ def test_enum_fails():
             'loc': ('tool',),
             'msg': 'value is not a valid enumeration member; permitted: 1, 2',
             'type': 'type_error.enum',
-            'ctx': {'enum_type': ToolEnum},
+            'ctx': {'enum_values': [ToolEnum.spanner, ToolEnum.wrench]},
         }
     ]
+    assert len(exc_info.value.json()) == 217
 
 
 def test_int_enum_successful_for_str_int():