tox-gh-actions is not yet compatible with tox>=4

Author: mr-c

.github/workflows/ci-tests.yml

@@ -57,7 +57,7 @@ jobs:
       - name: Upgrade setuptools and install tox
         run: |
           pip install -U pip setuptools wheel
-          pip install "tox<4" tox-gh-actions
+          pip install "tox<4" "tox-gh-actions<3"
 
       - name: MyPy cache
         if: ${{ matrix.step == 'mypy' }}
@@ -102,7 +102,7 @@ jobs:
       - name: Upgrade setuptools and install tox
         run: |
           pip install -U pip setuptools wheel
-          pip install tox tox-gh-actions
+          pip install "tox<4" "tox-gh-actions<3"
 
       - if: ${{ matrix.step == 'pydocstyle' && github.event_name == 'pull_request'}}
         name: Create local branch for diff-quality for PRs
@@ -224,7 +224,7 @@ jobs:
       - name: Upgrade setuptools and install tox
         run: |
           pip install -U pip setuptools wheel
-          pip install tox tox-gh-actions
+          pip install "tox<4" "tox-gh-actions<3"
       # # docker for mac install is not currently stable
       # - name: 'SETUP MacOS: load Homebrew cache'
       #   uses: actions/cache@v3

README.rst

@@ -716,7 +716,7 @@ To run the basic tests after installing `cwltool` execute the following:
 To run various tests in all supported Python environments, we use `tox <https://github.com/common-workflow-language/cwltool/tree/main/tox.ini>`_. To run the test suite in all supported Python environments
 first clone the complete code repository (see the ``git clone`` instructions above) and then run
 the following in the terminal:
-``pip install tox; tox -p``
+``pip install "tox<4"; tox -p``
 
 List of all environment can be seen using:
 ``tox --listenvs``