diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eef293fe8..06ec5bd4a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -84,16 +84,21 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11.0", "pypy-3.7", "pypy-3.8"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12-dev", "pypy-3.9", "pypy-3.10"]
         exclude:
           - os: "macos-latest"
-            python-version: "pypy-3.7"
+            python-version: "pypy-3.9"
           - os: "ubuntu-latest"
-            python-version: "pypy-3.7"
+            python-version: "pypy-3.9"
           - os: "macos-latest"
-            python-version: "pypy-3.8"
+            python-version: "pypy-3.10"
           - os: "windows-latest"
-            python-version: "pypy-3.8"
+            python-version: "pypy-3.10"
+          # FIXME remove these exclusions after 3.12 release; 3.12-dev setlocale(...) is broken on Windows & Mac
+          - os: "macos-latest"
+            python-version: "3.12-dev"
+          - os: "windows-latest"
+            python-version: "3.12-dev"
     steps:
       - uses: actions/checkout@v3
         with:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8761f3a6a..f2288240f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+* Declare official support of Python 3.12
+
 ### Deprecated
 * Deprecate `file_infos` argument. Use `file_info` instead. Old argument name won't be supported in v3.
 
@@ -17,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Fix crash on upload retry with unbound data source
 
 ### Infrastructure
+* Remove unsupported PyPy versions (3.7, 3.8) from tests matrix and add PyPy 3.9 & 3.10 instead
 * Replaced `pyflakes` with `ruff` for linting
 * Refactored logic for resuming large file uploads to unify code paths, correct inconsistencies, and enhance configurability (#381)
 * Automatically set copyright date when generating the docs
diff --git a/noxfile.py b/noxfile.py
index 0c3af5811..ddd44dd5a 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -22,6 +22,7 @@
     '3.9',
     '3.10',
     '3.11',
+    '3.12',
 ] if NOX_PYTHONS is None else NOX_PYTHONS.split(',')
 
 PYTHON_DEFAULT_VERSION = PYTHON_VERSIONS[-1]
@@ -35,7 +36,6 @@
     "pytest-cov==3.0.0",
     "pytest-mock==3.6.1",
     'pytest-lazy-fixture==0.6.3',
-    'pyfakefs==4.5.6',
     'pytest-xdist==2.5.0',
     'pytest-timeout==2.1.0',
 ]
@@ -103,7 +103,7 @@ def unit(session):
     """Run unit tests."""
     install_myself(session)
     session.run('pip', 'install', *REQUIREMENTS_TEST)
-    args = ['--doctest-modules', '-p', 'pyfakefs', '-n', 'auto']
+    args = ['--doctest-modules', '-n', 'auto']
     if not SKIP_COVERAGE:
         args += ['--cov=b2sdk', '--cov-branch', '--cov-report=xml']
     # TODO: Use session.parametrize for apiver
diff --git a/setup.py b/setup.py
index 16db078e2..350c1c9a9 100644
--- a/setup.py
+++ b/setup.py
@@ -85,6 +85,8 @@ def read_requirements(extra=None):
         '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',
     ],
 
     # What does your project relate to?
diff --git a/test/unit/account_info/test_sqlite_account_info.py b/test/unit/account_info/test_sqlite_account_info.py
index b3f34697a..4e0ff91fe 100644
--- a/test/unit/account_info/test_sqlite_account_info.py
+++ b/test/unit/account_info/test_sqlite_account_info.py
@@ -67,7 +67,11 @@ def test_migrate_to_4(self):
 
 class TestSqliteAccountProfileFileLocation:
     @pytest.fixture(autouse=True)
-    def setup(self, monkeypatch, fs):
+    def setup(self, monkeypatch, tmpdir):
+        monkeypatch.setenv(
+            'HOME', str(tmpdir)
+        )  # this affects .expanduser() and protects the real HOME folder
+        monkeypatch.setenv("USERPROFILE", str(tmpdir))  # same as HOME, but for Windows
         monkeypatch.delenv(B2_ACCOUNT_INFO_ENV_VAR, raising=False)
         monkeypatch.delenv(XDG_CONFIG_HOME_ENV_VAR, raising=False)