diff --git a/pandas/tests/extension/json/array.py b/pandas/tests/extension/json/array.py
index 9e741bb7f267c..1ba1b872fa5e2 100644
--- a/pandas/tests/extension/json/array.py
+++ b/pandas/tests/extension/json/array.py
@@ -16,7 +16,7 @@
 import random
 import string
 import sys
-from typing import Type
+from typing import Any, Mapping, Type
 
 import numpy as np
 
@@ -27,7 +27,7 @@
 class JSONDtype(ExtensionDtype):
     type = abc.Mapping
     name = "json"
-    na_value = UserDict()
+    na_value: Mapping[str, Any] = UserDict()
 
     @classmethod
     def construct_array_type(cls) -> Type["JSONArray"]:
diff --git a/setup.cfg b/setup.cfg
index cf931f52489a8..c298aa652824c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -138,9 +138,6 @@ ignore_errors=True
 [mypy-pandas.tests.extension.decimal.test_decimal]
 ignore_errors=True
 
-[mypy-pandas.tests.extension.json.array]
-ignore_errors=True
-
 [mypy-pandas.tests.extension.json.test_json]
 ignore_errors=True