old_contents: # Copyright 2018 Google LLC
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     https://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from __future__ import absolute_import
  import os
  
  import nox
  
  
  @nox.session
  def default(session):
      return unit(session, 'default')
  
  
  @nox.session
  @nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
  def unit(session, py):
      """Run the unit test suite."""
  
      # Run unit tests against all supported versions of Python.
      if py != 'default':
          session.interpreter = 'python{}'.format(py)
  
      # Set the virtualenv directory name.
      session.virtualenv_dirname = 'unit-' + py
  
      # Install all test dependencies, then install this package in-place.
      session.install('pytest')
      session.install('-e', '.')
  
      # Run py.test against the unit tests.
      session.run('py.test', '--quiet', os.path.join('tests', 'unit'))
  
  
  @nox.session
  def lint_setup_py(session):
      """Verify that setup.py is valid (including RST check)."""
      session.interpreter = 'python3.6'
      session.install('docutils', 'pygments')
      session.run('python', 'setup.py', 'check', '--restructuredtext',
                  '--strict')
  
new_contents: # Copyright 2018 Google LLC
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     https://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from __future__ import absolute_import
  import os
  
  import nox
  
  
  @nox.session
  def default(session):
      return unit(session, 'default')
  
  
  @nox.session
  @nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
  def unit(session, py):
      """Run the unit test suite."""
  
      # Run unit tests against all supported versions of Python.
      if py != 'default':
          session.interpreter = 'python{}'.format(py)
  
      # Set the virtualenv directory name.
      session.virtualenv_dirname = 'unit-' + py
  
      # Install all test dependencies, then install this package in-place.
      session.install('pytest')
      session.install('-e', '.')
  
      # Run py.test against the unit tests.
      session.run('py.test', '--quiet', os.path.join('tests', 'unit'))
  
  
  @nox.session
  def lint_setup_py(session):
      """Verify that setup.py is valid (including RST check)."""
      session.interpreter = 'python3.6'
      session.install('docutils', 'pygments')
      session.run('python', 'setup.py', 'check', '--restructuredtext',
                  '--strict')
  
subject: Add Test runs for Python 3.7 and remove 3.4 (#5295)