Set TOXENV to pypy3 on macOS @ GH Actions CI/CD

.github/workflows/python-tests.yml

@@ -78,12 +78,16 @@ jobs:
     - name: 'Initialize tox envs: ${{ matrix.env.TOXENV }}'
       run: |
         ${{ startsWith(matrix.os, 'windows-') && 'setx TOXENV ' || 'export TOXENV=' }}${{ ('2.7' == matrix.python-version && 'py27') || ('pypy2' == matrix.python-version && 'pypy2') || '$TOXENV' }}
+        ${{ startsWith(matrix.os, 'macOS-') && 'pypy3' == matrix.python-version  && 'export TOXENV=pypy3' || '' }}
+        echo TOXENV="$TOXENV"
         python -m tox --parallel auto --notest --skip-missing-interpreters false
       env: ${{ matrix.env }}
     - name: Test with tox
       run: |
         ${{ startsWith(matrix.os, 'windows-') && 'setx NETWORK_REQUIRED ' || 'export NETWORK_REQUIRED=' }}1
         ${{ startsWith(matrix.os, 'windows-') && 'setx TOXENV ' || 'export TOXENV=' }}${{ ('2.7' == matrix.python-version && 'py27') || ('pypy2' == matrix.python-version && 'pypy2') || '$TOXENV' }}
+        ${{ startsWith(matrix.os, 'macOS-') && 'pypy3' == matrix.python-version  && 'export TOXENV=pypy3' || '' }}
+        echo TOXENV="$TOXENV"
         python -m tox \
         --parallel 0 \
         -- \