Test for #27895

27895.diff

diff --git a/tests/test_client_regress/tests.py b/tests/test_client_regress/tests.py
index c9dffdb..0233786 100644
--- a/tests/test_client_regress/tests.py
+++ b/tests/test_client_regress/tests.py
@@ -1200,6 +1200,21 @@ class RequestMethodStringDataTests(SimpleTestCase):
         response = self.client.get('/json_response/')
         self.assertEqual(response.json(), {'key': 'value'})
 
+    def test_json_non_ascii(self):
+        """Test with both escaped and non-escaped UTF-8 content."""
+        response = self.client.post(
+            '/parse_unicode_json/',
+            '{"dog": "собака"}',
+            content_type="application/json; charset=utf-8",
+        )
+        self.assertEqual(response.json(), {"dog": "собака"})
+        response = self.client.post(
+            '/parse_unicode_json/',
+            '{"dog": "\\u0441\\u043e\\u0431\\u0430\\u043a\\u0430"}',
+            content_type="application/json; charset=utf-8",
+        )
+        self.assertEqual(response.json(), {"dog": "собака"})
+
     def test_json_vendor(self):
         valid_types = (
             'application/vnd.api+json',