Add tox dependency for gh actions checks and pytest

.github/workflows/tox_checks.yml

@@ -45,7 +45,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install -U pip
-          python -m pip install -U -e .[build,docs,test]
+          python -m pip install -U -e .[build,docs,test,tox]
 
       - name: Run ${{ matrix.toxenv }}
         run: python -m tox -e ${{ matrix.toxenv }}

.github/workflows/tox_pytests.yml

@@ -27,7 +27,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install -e .[test]
+        pip install -e .[test,tox]
         pip install tox-gh-actions
     - name: Test with tox
       run: tox