diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index ef49b4e58..df0e4e489 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -68,9 +68,6 @@ jobs:
           - "3.12"
           - "pypy3.9"
         experimental: [ false ]
-        include:
-          - python-version: "~3.13.0-0"
-            experimental: true
     steps:
       - name: Checkout the source code
         uses: actions/checkout@v4
@@ -110,7 +107,7 @@ jobs:
           KAFKA_VERSION: ${{ env.KAFKA_LATEST }}
 
   test-kafka:
-    name: Tests for Kafka ${{ matrix.kafka-version }}
+    name: Tests for Kafka ${{ matrix.kafka-version }} (Python ${{ matrix.python-version }})
     needs:
       - build-sdist
     runs-on: ubuntu-latest
@@ -127,10 +124,17 @@ jobs:
           - "2.4.0"
           - "2.5.0"
           - "2.6.0"
+        python-version: ['3.12']
         experimental: [false]
         include:
           - kafka-version: '0.8.2.2'
             experimental: true
+            python-version: "3.12"
+          - kafka-version: '0.8.2.2'
+            experimental: false
+            python-version: "3.10"
+    env:
+      PYTHON_LATEST: ${{ matrix.python-version }}
     continue-on-error: ${{ matrix.experimental }}
     steps:
       - name: Checkout the source code
@@ -145,7 +149,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: ${{ env.PYTHON_LATEST }}
+          python-version: ${{ matrix.python-version }}
           cache: pip
           cache-dependency-path: |
             requirements-dev.txt
diff --git a/kafka/client_async.py b/kafka/client_async.py
index 58f22d4ec..530a1f441 100644
--- a/kafka/client_async.py
+++ b/kafka/client_async.py
@@ -637,6 +637,9 @@ def _poll(self, timeout):
             self._sensors.select_time.record((end_select - start_select) * 1000000000)
 
         for key, events in ready:
+            if key.fileobj.fileno() < 0:
+                self._selector.unregister(key.fileobj)
+
             if key.fileobj is self._wake_r:
                 self._clear_wake_fd()
                 continue
diff --git a/kafka/protocol/admin.py b/kafka/protocol/admin.py
index f9d61e5cd..0bb1a7acc 100644
--- a/kafka/protocol/admin.py
+++ b/kafka/protocol/admin.py
@@ -719,7 +719,7 @@ class DescribeConfigsResponse_v1(Response):
                 ('config_names', String('utf-8')),
                 ('config_value', String('utf-8')),
                 ('read_only', Boolean),
-                ('is_default', Boolean),
+                ('config_source', Int8),
                 ('is_sensitive', Boolean),
                 ('config_synonyms', Array(
                     ('config_name', String('utf-8')),
@@ -925,7 +925,7 @@ class DeleteGroupsRequest_v1(Request):
 ]
 
 
-class DescribeClientQuotasResponse_v0(Request):
+class DescribeClientQuotasResponse_v0(Response):
     API_KEY = 48
     API_VERSION = 0
     SCHEMA = Schema(
diff --git a/setup.cfg b/setup.cfg
index 5c6311daf..76daa0897 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,4 +2,4 @@
 universal=1
 
 [metadata]
-license_file = LICENSE
+license_files = LICENSE
diff --git a/setup.py b/setup.py
index 75d2b8bcb..dd4e5de90 100644
--- a/setup.py
+++ b/setup.py
@@ -32,6 +32,7 @@ def run(cls):
 
 setup(
     name="kafka-python-ng",
+    python_requires=">=3.8",
     use_scm_version=True,
     setup_requires=["setuptools_scm"],
     tests_require=test_require,
@@ -60,13 +61,6 @@ def run(cls):
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",