diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 63badb33e..2279097a0 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9, "3.10", 3.11]
+        python-version: [3.7, 3.8, 3.9, "3.10", 3.11, 3.12]
     env:
       MOLER_DEBUG_THREADS: True
     steps:
@@ -47,13 +47,8 @@ jobs:
           which adb
           echo ----------- test adb simulator
           adb devices
-      - name: Test with pytest Python 2.7
-        if: ${{ matrix.python-version == '2.7' }}
-        timeout-minutes: 9
-        run: |
-          python -m pytest -vvvsss test/
       - name: Test with pytest
-        if: ${{ (matrix.python-version != '3.9') && (matrix.python-version != '2.7') }}
+        if: ${{ matrix.python-version != '3.9' }}
         timeout-minutes: 9
         run: |
           python -m pytest -vvvsss test/
diff --git a/README.md b/README.md
index 8cc1f3196..dd5e6917f 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 [![image](https://img.shields.io/badge/pypi-v2.15.0-blue.svg)](https://pypi.org/project/moler/)
-[![image](https://img.shields.io/badge/python-2.7%20%7C%203.6%20%7C%203.7%20%7C%203.8%20%7C%203.9%20%7C%203.10%20%7C%203.11-blue.svg)](https://pypi.org/project/moler/)
+[![image](https://img.shields.io/badge/python-2.7%20%7C%203.6%20%7C%203.7%20%7C%203.8%20%7C%203.9%20%7C%203.10%20%7C%203.11%20%7C%203.12-blue.svg)](https://pypi.org/project/moler/)
 [![Build Status](https://travis-ci.org/nokia/moler.svg?branch=master)](https://travis-ci.org/nokia/moler)
 [![Coverage Status](https://coveralls.io/repos/github/nokia/moler/badge.svg?branch=master)](https://coveralls.io/github/nokia/moler?branch=master)
 [![BCH compliance](https://bettercodehub.com/edge/badge/nokia/moler?branch=master)](https://bettercodehub.com/)
diff --git a/setup.py b/setup.py
index a13491101..acb8deeda 100644
--- a/setup.py
+++ b/setup.py
@@ -43,6 +43,8 @@
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
+        'Programming Language :: Python :: 3.12',
 
         'Topic :: Software Development',
         'Topic :: Software Development :: Testing',
diff --git a/test/test_connection_observer.py b/test/test_connection_observer.py
index 053c3bbc5..1f39f2484 100644
--- a/test/test_connection_observer.py
+++ b/test/test_connection_observer.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 __author__ = 'Grzegorz Latuszek, Marcin Usielski'
-__copyright__ = 'Copyright (C) 2018-2021, Nokia'
+__copyright__ = 'Copyright (C) 2018-2023, Nokia'
 __email__ = 'grzegorz.latuszek@nokia.com, marcin.usielski@nokia.com'
 
 import importlib
@@ -378,8 +378,10 @@ def test_connection_observer_has_data_received_api(connection_observer_major_bas
     # only derived ones can have logic "what to do with incoming data"
     with pytest.raises(TypeError) as error:
         hasattr(connection_observer_class(), "data_received")
-    assert "Can't instantiate abstract class {} with abstract method".format(
-        connection_observer_class.__name__) in str(error.value)
+    assert "Can't instantiate abstract class {} with abstract method".format(  # <3.12
+        connection_observer_class.__name__) in str(error.value) or\
+           "Can't instantiate abstract class {} without an implementation for abstract method".format(
+        connection_observer_class.__name__) in str(error.value)  # 3.12
     assert "data_received" in str(error.value)
 
     # example of derived connection_observer implementing it's "data consumption logic"