@@ -12,38 +12,61 @@ jobs:
       SHELLOPTS: igncr
       TMP: "/tmp"
       TEMP: "/tmp"
+    defaults:
+      run:
+        shell: bash.exe -eo pipefail -o igncr "{0}"
 
     steps:
     - name: Force LF line endings
       run: git config --global core.autocrlf input
+
     - uses: actions/checkout@v4
       with:
         fetch-depth: 9999
+
     - uses: cygwin/cygwin-install-action@v4
       with:
         packages: python39 python39-pip python39-virtualenv git
+
+    - name: Show python and git versions
+      run: |
+        set -x
+        /usr/bin/python --version
+        /usr/bin/git version
+
     - name: Tell git to trust this repo
-      shell: bash.exe -eo pipefail -o igncr "{0}"
       run: |
           /usr/bin/git config --global --add safe.directory "$(pwd)"
-    - name: Install dependencies and prepare tests
-      shell: bash.exe -eo pipefail -o igncr "{0}"
+
+    - name: Prepare this repo for tests
       run: |
         set -x
-        /usr/bin/python -m pip install --upgrade pip setuptools wheel
-        /usr/bin/python --version; /usr/bin/git --version
+
         /usr/bin/git submodule update --init --recursive
         /usr/bin/git fetch --tags
-        /usr/bin/python -m pip install -r requirements.txt
-        /usr/bin/python -m pip install -r test-requirements.txt
         TRAVIS=yes ./init-tests-after-clone.sh
+
+    - name: Further prepare git configuration for tests
+      run: |
+        set -x
+
         /usr/bin/git config --global user.email "travis@ci.com"
         /usr/bin/git config --global user.name "Travis Runner"
         # If we rewrite the user's config by accident, we will mess it up
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
+
+    - name: Update PyPA packages
+      run: |
+        set -x
+        /usr/bin/python -m pip install --upgrade pip setuptools wheel
+
+    - name: Install project and test dependencies
+      run: |
+        set -x
+        /usr/bin/python -m pip install ".[test]"
+
     - name: Test with pytest
-      shell: bash.exe -eo pipefail -o igncr "{0}"
       run: |
+        set -x
         /usr/bin/python -m pytest
-      continue-on-error: false
 
@@ -15,42 +15,70 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        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"]
+        include:
+          - experimental: false
+          - python-version: "3.12"
+            experimental: true
 
     steps:
     - uses: actions/checkout@v4
       with:
         fetch-depth: 9999
+
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
-    - name: Install dependencies and prepare tests
+        allow-prereleases: ${{ matrix.experimental }}
+
+    - name: Show python and git versions
+      run: |
+        set -x
+        python --version
+        git version
+
+    - name: Prepare this repo for tests
       run: |
         set -x
 
-        python -m pip install --upgrade pip setuptools wheel
-        python --version; git --version
         git submodule update --init --recursive
         git fetch --tags --force
-
-        pip install -r requirements.txt
-        pip install -r test-requirements.txt
         TRAVIS=yes ./init-tests-after-clone.sh
 
+    - name: Prepare git configuration for tests
+      run: |
+        set -x
+
         git config --global user.email "travis@ci.com"
         git config --global user.name "Travis Runner"
         # If we rewrite the user's config by accident, we will mess it up
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
+    - name: Update PyPA packages
+      run: |
+        set -x
+
+        python -m pip install --upgrade pip
+        if pip freeze --all | grep --quiet '^setuptools=='; then
+            # Python prior to 3.12 ships setuptools. Upgrade it if present.
+            python -m pip install --upgrade setuptools
+        fi
+        python -m pip install --upgrade wheel
+
+    - name: Install project and test dependencies
+      run: |
+        set -x
+        pip install ".[test]"
+
     - name: Check types with mypy
-      # With new versions of pypi new issues might arise. This is a problem if there is nobody able to fix them,
-      # so we have to ignore errors until that changes.
-      continue-on-error: true
       run: |
         set -x
         mypy -p git
+      # With new versions of mypy new issues might arise. This is a problem if there is nobody able to fix them,
+      # so we have to ignore errors until that changes.
+      continue-on-error: true
 
     - name: Test with pytest
       run: |