diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..8ac6b8c
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index b75050d..75b3a9c 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -35,11 +35,11 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
+      uses: github/codeql-action/init@v2
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -50,7 +50,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v1
+      uses: github/codeql-action/autobuild@v2
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -64,4 +64,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1
+      uses: github/codeql-action/analyze@v2
diff --git a/.github/workflows/python-build-test.yml b/.github/workflows/python-build-test.yml
new file mode 100644
index 0000000..8f36aa8
--- /dev/null
+++ b/.github/workflows/python-build-test.yml
@@ -0,0 +1,76 @@
+name: Build and test
+
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+    
+jobs:
+  build-py3:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install flake8 pytest
+          python setup.py install
+      - name: Lint with flake8
+        run: |
+          # stop the build if there are Python syntax errors or undefined names
+          flake8 . --count --show-source --statistics
+      - name: Test with pytest
+        run: |
+          pytest --capture=no
+
+  build-py_legacy:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        python-version: ["3.6"]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install flake8 pytest mock
+          python setup.py install
+      - name: Lint with flake8
+        run: |
+          # stop the build if there are Python syntax errors or undefined names
+          flake8 . --count --show-source --statistics
+      - name: Test with pytest
+        run: |
+          pytest --capture=no
+
+  build-docs:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10"]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install sphinx
+      - name: Build docs with Sphinx
+        run: |
+          cd doc
+          sphinx-build -W -b html -d ./doctrees . ./html
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index 80adb8b..07885aa 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -5,7 +5,7 @@ name: Upload Python Package
 
 on:
   release:
-    types: [created]
+    types: [published]
 
 jobs:
   deploy:
@@ -13,9 +13,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: '3.x'
     - name: Install dependencies
diff --git a/.gitignore b/.gitignore
index 89552e2..c11b868 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 .tox/
 doc/_build
+doc/doctrees
+doc/html
 build/
 dist/
 .vscode/
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 3aac176..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,24 +0,0 @@
-language: python
-cache: pip
-
-matrix:
-    include:
-        - python: 2.7
-          env: TOXENV=py27
-        - python: 3.4
-          env: TOXENV=py34
-        - python: 3.5
-          env: TOXENV=py35
-        - python: 3.6
-          env: TOXENV=py36
-        - python: 3.7
-          env: TOXENV=py37
-        - python: 3.8
-          env: TOXENV=py38
-        - python: 3.9
-          env: TOXENV=py39
-        - python: 3.5
-          env: TOXENV=qa,doc
-
-install: pip install --upgrade setuptools pip tox
-script: tox -v
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5b175dc..18799a6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,21 @@
 Notable changes to the smbus2 project are recorded here.
 
 ## [Unreleased]
-No unreleased updates.
+No changes since last release.
+
+## [0.4.3] - 2023-08-25
+- Build pipeline and test updates only:
+  - Upgrade build pipelines
+    - Added Python 3.11
+    - Python 2.7, 3.4, and 3.5 no longer tested.
+- Update deprecated Sphinx config format.
+- Corrected deprecated `assertEquals` in the unit tests.
+
+## [0.4.2] - 2022-06-05
+### General
+- Explicitly export from top level of package [#69](https://github.com/kplindegaard/smbus2/pull/69).
+- Transitioned pipelines from Travis-CI to GitHub Actions.
+  - Python 3.10 added.
 
 ## [0.4.1] - 2021-01-17
 ### General
@@ -86,7 +100,9 @@ with SMBus(1) as bus:
 First published version.
 
 
-[Unreleased]: https://github.com/kplindegaard/smbus2/compare/0.4.1...HEAD
+[Unreleased]: https://github.com/kplindegaard/smbus2/compare/0.4.3...HEAD
+[0.4.3]: https://github.com/kplindegaard/smbus2/compare/0.4.2...0.4.3
+[0.4.2]: https://github.com/kplindegaard/smbus2/compare/0.4.1...0.4.2
 [0.4.1]: https://github.com/kplindegaard/smbus2/compare/0.4.0...0.4.1
 [0.4.0]: https://github.com/kplindegaard/smbus2/compare/0.3.0...0.4.0
 [0.3.0]: https://github.com/kplindegaard/smbus2/compare/0.2.3...0.3.0
diff --git a/README.md b/README.md
index 0c8e921..b14ff8a 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,9 @@
 # smbus2
 A drop-in replacement for smbus-cffi/smbus-python in pure Python
 
-[![Build Status](https://travis-ci.org/kplindegaard/smbus2.svg?branch=master)](https://travis-ci.org/kplindegaard/smbus2) 
+[![Build Status](https://github.com/kplindegaard/smbus2/actions/workflows/python-build-test.yml/badge.svg?branch=master)](https://github.com/kplindegaard/smbus2/actions/workflows/python-build-test.yml)
 [![Documentation Status](https://readthedocs.org/projects/smbus2/badge/?version=latest)](http://smbus2.readthedocs.io/en/latest/?badge=latest)
+![CodeQL](https://github.com/kplindegaard/smbus2/actions/workflows/codeql-analysis.yml/badge.svg?branch=master)
 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=kplindegaard_smbus2&metric=alert_status)](https://sonarcloud.io/dashboard?id=kplindegaard_smbus2)
 
 ![Python Verions](https://img.shields.io/pypi/pyversions/smbus2.svg)
@@ -11,7 +12,7 @@ A drop-in replacement for smbus-cffi/smbus-python in pure Python
 
 # Introduction
 
-smbus2 is (yet another) pure Python implementation of of the [python-smbus](http://www.lm-sensors.org/browser/i2c-tools/trunk/py-smbus/) package.
+smbus2 is (yet another) pure Python implementation of the [python-smbus](http://www.lm-sensors.org/browser/i2c-tools/trunk/py-smbus/) package.
 
 It was designed from the ground up with two goals in mind:
 
@@ -47,66 +48,78 @@ smbus2 installs next to smbus as the package, so it's not really a 100% replacem
 
 ## Example 1a: Read a byte
 
-    from smbus2 import SMBus
+```python
+from smbus2 import SMBus
+
+# Open i2c bus 1 and read one byte from address 80, offset 0
+bus = SMBus(1)
+b = bus.read_byte_data(80, 0)
+print(b)
+bus.close()
+```
 
-    # Open i2c bus 1 and read one byte from address 80, offset 0
-    bus = SMBus(1)
-    b = bus.read_byte_data(80, 0)
-    print(b)
-    bus.close()
-    
 ## Example 1b: Read a byte using 'with'
 
 This is the very same example but safer to use since the smbus will be closed automatically when exiting the with block.
 
-    from smbus2 import SMBus
-    
-    with SMBus(1) as bus:
-        b = bus.read_byte_data(80, 0)
-        print(b)
+```python
+from smbus2 import SMBus
+
+with SMBus(1) as bus:
+    b = bus.read_byte_data(80, 0)
+    print(b)
+```
 
 ## Example 1c: Read a byte with PEC enabled
 
 Same example with Packet Error Checking enabled.
 
-    from smbus2 import SMBus
+```python
+from smbus2 import SMBus
 
-    with SMBus(1) as bus:
-        bus.pec = 1  # Enable PEC
-        b = bus.read_byte_data(80, 0)
-        print(b)
+with SMBus(1) as bus:
+    bus.pec = 1  # Enable PEC
+    b = bus.read_byte_data(80, 0)
+    print(b)
+```
 
 ## Example 2: Read a block of data
 
 You can read up to 32 bytes at once.
 
-    from smbus2 import SMBus
-    
-    with SMBus(1) as bus:
-        # Read a block of 16 bytes from address 80, offset 0
-        block = bus.read_i2c_block_data(80, 0, 16)
-        # Returned value is a list of 16 bytes
-        print(block)
+```python
+from smbus2 import SMBus
+
+with SMBus(1) as bus:
+    # Read a block of 16 bytes from address 80, offset 0
+    block = bus.read_i2c_block_data(80, 0, 16)
+    # Returned value is a list of 16 bytes
+    print(block)
+```
 
 ## Example 3: Write a byte
 
-    from smbus2 import SMBus
-    
-    with SMBus(1) as bus:
-        # Write a byte to address 80, offset 0
-        data = 45
-        bus.write_byte_data(80, 0, data)
+```python
+from smbus2 import SMBus
+
+with SMBus(1) as bus:
+    # Write a byte to address 80, offset 0
+    data = 45
+    bus.write_byte_data(80, 0, data)
+```
 
 ## Example 4: Write a block of data
 
 It is possible to write 32 bytes at the time, but I have found that error-prone. Write less and add a delay in between if you run into trouble.
 
-    from smbus2 import SMBus
-    
-    with SMBus(1) as bus:
-        # Write a block of 8 bytes to address 80 from offset 0
-        data = [1, 2, 3, 4, 5, 6, 7, 8]
-        bus.write_i2c_block_data(80, 0, data)
+```python
+from smbus2 import SMBus
+
+with SMBus(1) as bus:
+    # Write a block of 8 bytes to address 80 from offset 0
+    data = [1, 2, 3, 4, 5, 6, 7, 8]
+    bus.write_i2c_block_data(80, 0, data)
+```
 
 # I2C
 
@@ -120,61 +133,72 @@ Each operation is represented by a *i2c_msg* message object.
 
 ## Example 5: Single i2c_rdwr
 
-    from smbus2 import SMBus, i2c_msg
+```python
+from smbus2 import SMBus, i2c_msg
+
+with SMBus(1) as bus:
+    # Read 64 bytes from address 80
+    msg = i2c_msg.read(80, 64)
+    bus.i2c_rdwr(msg)
+    
+    # Write a single byte to address 80
+    msg = i2c_msg.write(80, [65])
+    bus.i2c_rdwr(msg)
     
-    with SMBus(1) as bus:
-        # Read 64 bytes from address 80
-        msg = i2c_msg.read(80, 64)
-        bus.i2c_rdwr(msg)
-        
-        # Write a single byte to address 80
-        msg = i2c_msg.write(80, [65])
-        bus.i2c_rdwr(msg)
-        
-        # Write some bytes to address 80
-        msg = i2c_msg.write(80, [65, 66, 67, 68])
-        bus.i2c_rdwr(msg)
+    # Write some bytes to address 80
+    msg = i2c_msg.write(80, [65, 66, 67, 68])
+    bus.i2c_rdwr(msg)
+```
 
 ## Example 6: Dual i2c_rdwr
 
 To perform dual operations just add more i2c_msg instances to the bus call:
 
-    from smbus2 import SMBus, i2c_msg
-    
-    # Single transaction writing two bytes then read two at address 80
-    write = i2c_msg.write(80, [40, 50])
-    read = i2c_msg.read(80, 2)
-    with SMBus(1) as bus:
-        bus.i2c_rdwr(write, read)
+```python
+from smbus2 import SMBus, i2c_msg
+
+# Single transaction writing two bytes then read two at address 80
+write = i2c_msg.write(80, [40, 50])
+read = i2c_msg.read(80, 2)
+with SMBus(1) as bus:
+    bus.i2c_rdwr(write, read)
+```
 
 ## Example 7: Access i2c_msg data
 
 All data is contained in the i2c_msg instances. Here are some data access alternatives.
 
-        # 1: Convert message content to list
-        msg = i2c_msg.write(60, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
-        data = list(msg)  # data = [1, 2, 3, ...]
-        print(len(data))  # => 10
-        
-        # 2: i2c_msg is iterable
-        for value in msg:
-            print(value)
-        
-        # 3: Through i2c_msg properties
-        for k in range(msg.len):
-            print(msg.buf[k])
+```python
+# 1: Convert message content to list
+msg = i2c_msg.write(60, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
+data = list(msg)  # data = [1, 2, 3, ...]
+print(len(data))  # => 10
+
+# 2: i2c_msg is iterable
+for value in msg:
+    print(value)
 
+# 3: Through i2c_msg properties
+for k in range(msg.len):
+    print(msg.buf[k])
+```
 
 # Installation instructions
 
-From PyPi with `pip`:
+From [PyPi](https://pypi.org/) with `pip`:
 
-    pip install smbus2
+```
+pip install smbus2
+```
 
-From conda-forge using `conda`:
+From [conda-forge](https://anaconda.org/conda-forge) using `conda`:
 
-    conda install -c conda-forge smbus2
+```
+conda install -c conda-forge smbus2
+```
 
 Installation from source code is straight forward:
 
-    python setup.py install
+```
+python setup.py install
+```
diff --git a/doc/conf.py b/doc/conf.py
index 3194589..036b3e4 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -22,7 +22,7 @@
 import sys
 sys.path.insert(0, os.path.abspath('..'))
 
-from smbus2 import __version__
+from smbus2 import __version__  # noqa: E402
 
 
 # -- General configuration ------------------------------------------------
@@ -34,8 +34,10 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['sphinx.ext.autodoc',
-    'sphinx.ext.intersphinx']
+extensions = [
+    'sphinx.ext.autodoc',
+    'sphinx.ext.intersphinx'
+]
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -68,7 +70,7 @@
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = 'en'
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
@@ -171,4 +173,4 @@
 
 
 # Configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {'https://docs.python.org/2/': None}
+intersphinx_mapping = {'python': ('https://docs.python.org/3/', None)}
diff --git a/doc/index.rst b/doc/index.rst
index c9314ae..801a63c 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -1,7 +1,7 @@
 smbus2
 ======
-.. image:: https://travis-ci.org/kplindegaard/smbus2.svg?branch=master
-   :target: https://travis-ci.org/kplindegaard/smbus2
+.. image:: https://github.com/kplindegaard/smbus2/actions/workflows/python-build-test.yml/badge.svg?branch=master
+   :target: https://github.com/kplindegaard/smbus2/actions/workflows/python-build-test.yml
 
 .. image:: https://img.shields.io/pypi/pyversions/smbus2.svg
     :target: https://pypi.python.org/pypi/smbus2
@@ -12,4 +12,3 @@ smbus2
 .. automodule:: smbus2
     :members: SMBus, i2c_msg
     :undoc-members:
-
diff --git a/setup.cfg b/setup.cfg
index f1d8a6f..9b3beb5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -14,3 +14,6 @@ exclude =
     doc,
     build,
     dist
+
+[pycodestyle]
+max-line-length = 100
diff --git a/setup.py b/setup.py
index 962ec4b..faa3117 100644
--- a/setup.py
+++ b/setup.py
@@ -65,6 +65,8 @@ def find_version(*file_paths):
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9"
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11"
     ],
 )
diff --git a/smbus2/__init__.py b/smbus2/__init__.py
index 38a5f03..f52948f 100644
--- a/smbus2/__init__.py
+++ b/smbus2/__init__.py
@@ -22,5 +22,5 @@
 
 from .smbus2 import SMBus, i2c_msg, I2cFunc  # noqa: F401
 
-__version__ = "0.4.1"
+__version__ = "0.4.3"
 __all__ = ["SMBus", "i2c_msg", "I2cFunc"]
diff --git a/tests/test_smbus2.py b/tests/test_smbus2.py
index 286fbcf..378664b 100644
--- a/tests/test_smbus2.py
+++ b/tests/test_smbus2.py
@@ -106,17 +106,26 @@ def mock_ioctl(fd, command, msg):
 open_mock = mock.patch('smbus2.smbus2.os.open', mock_open)
 close_mock = mock.patch('smbus2.smbus2.os.close', mock_close)
 ioctl_mock = mock.patch('smbus2.smbus2.ioctl', mock_ioctl)
-open_mock.start()
-close_mock.start()
-ioctl_mock.start()
 ##########################################################################
 
 # Common error messages
 INCORRECT_LENGTH_MSG = "Result array of incorrect length."
 
 
+class SMBusTestCase(unittest.TestCase):
+    def setUp(self):
+        open_mock.start()
+        close_mock.start()
+        ioctl_mock.start()
+
+    def tearDown(self):
+        open_mock.stop()
+        close_mock.stop()
+        ioctl_mock.stop()
+
+
 # Test cases
-class TestSMBus(unittest.TestCase):
+class TestSMBus(SMBusTestCase):
     def test_func(self):
         bus = SMBus(1)
         print("\nSupported I2C functionality: %x" % bus.funcs)
@@ -184,16 +193,16 @@ def set_pec(bus, enable=True):
         bus = SMBus(1)
         self.assertRaises(IOError, set_pec, bus, True)
         self.assertRaises(IOError, set_pec, bus, 1)
-        self.assertEquals(bus.pec, 0)
+        self.assertEqual(bus.pec, 0)
 
         # Ensure PEC status is reset by close()
         bus._pec = 1
-        self.assertEquals(bus.pec, 1)
+        self.assertEqual(bus.pec, 1)
         bus.close()
-        self.assertEquals(bus.pec, 0)
+        self.assertEqual(bus.pec, 0)
 
 
-class TestSMBusWrapper(unittest.TestCase):
+class TestSMBusWrapper(SMBusTestCase):
     """Similar test as TestSMBus except it encapsulates it all access within "with" blocks."""
 
     def test_func(self):
@@ -231,7 +240,7 @@ def test_read(self):
         self.assertListEqual(res, res3, msg="Byte and block reads differ")
 
 
-class TestI2CMsg(unittest.TestCase):
+class TestI2CMsg(SMBusTestCase):
     def test_i2c_msg(self):
         # 1: Convert message content to list
         msg = i2c_msg.write(60, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 5154409..0000000
--- a/tox.ini
+++ /dev/null
@@ -1,20 +0,0 @@
-[tox]
-envlist = py{27,34,35,36,37,38,39},qa,doc
-skip_missing_interpreters = True
-
-[testenv]
-commands =
-    python setup.py install
-    nosetests -v
-deps = .[test]
-
-[testenv:qa]
-commands =
-    flake8
-deps = .[qa]
-
-[testenv:doc]
-commands =
-    sphinx-build -W -b html -d {envtmpdir}/doctrees . {envtmpdir}/html
-changedir = doc
-deps = .[docs]