diff --git a/changelog.d/11455.misc b/changelog.d/11455.misc
new file mode 100644
index 000000000000..7c83f62e3fa5
--- /dev/null
+++ b/changelog.d/11455.misc
@@ -0,0 +1 @@
+Convert status codes to `HTTPStatus` in `synapse.rest.admin`.
\ No newline at end of file
diff --git a/tests/rest/admin/test_media.py b/tests/rest/admin/test_media.py
index 165b21d9c744..71158ac5ee18 100644
--- a/tests/rest/admin/test_media.py
+++ b/tests/rest/admin/test_media.py
@@ -15,6 +15,7 @@
 
 import json
 import os
+from http import HTTPStatus
 
 from parameterized import parameterized
 
diff --git a/tests/rest/admin/test_registration_tokens.py b/tests/rest/admin/test_registration_tokens.py
index d7ba5938cd9a..63087955f2a7 100644
--- a/tests/rest/admin/test_registration_tokens.py
+++ b/tests/rest/admin/test_registration_tokens.py
@@ -205,9 +205,7 @@ def test_create_token_already_exists(self):
             data,
             access_token=self.admin_user_tok,
         )
-        self.assertEqual(
-            HTTPStatus.BAD_REQUEST, channel2.code, msg=channel2.json_body
-        )
+        self.assertEqual(HTTPStatus.BAD_REQUEST, channel2.code, msg=channel2.json_body)
         self.assertEqual(channel2.json_body["errcode"], Codes.INVALID_PARAM)
 
     def test_create_unable_to_generate_token(self):
diff --git a/tests/rest/admin/test_server_notice.py b/tests/rest/admin/test_server_notice.py
index c36f634f4f5d..0b9da4c732ea 100644
--- a/tests/rest/admin/test_server_notice.py
+++ b/tests/rest/admin/test_server_notice.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from http import HTTPStatus
 from typing import List
 
 import synapse.rest.admin
diff --git a/tests/rest/admin/test_username_available.py b/tests/rest/admin/test_username_available.py
index 70067b7fb529..7978626e7197 100644
--- a/tests/rest/admin/test_username_available.py
+++ b/tests/rest/admin/test_username_available.py
@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from http import HTTPStatus
+
 import synapse.rest.admin
 from synapse.api.errors import Codes, SynapseError
 from synapse.rest.client import login