old_contents: # Copyright 2018 Google LLC. All Rights Reserved.
  #
  # 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
  #
  #      http://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.
  
  """Nox config for running lint and unit tests."""
  
  import nox
  
  LINT_UNIT_DIR = ['compatibility_server',]
  
  
  @nox.session
  def lint(session):
      """Run flake8.
  
      Returns a failure if flake8 finds linting errors or sufficiently
      serious code quality issues.
      """
      session.interpreter = 'python3.6'
      session.install('flake8')
      session.run('flake8',
                  ','.join(LINT_UNIT_DIR),
                  '--exclude=test_*')
  
  
  @nox.session
  def unit(session, py):
      """Run the unit test suite.
      
      Unit test files should be named like test_*.py and in the same directory
      as the file being tested.
      """
      session.interpreter = 'python3.6'
  
      # Run py.test against the unit tests.
      session.run(
          'py.test',
          '--quiet',
          ','.join(LINT_UNIT_DIR),
          *session.posargs
      )
  
new_contents: # Copyright 2018 Google LLC. All Rights Reserved.
  #
  # 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
  #
  #      http://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.
  
  """Nox config for running lint and unit tests."""
  
  import nox
  
  LINT_UNIT_DIR = ['compatibility_server',]
  
  
  @nox.session
  def lint(session):
      """Run flake8.
  
      Returns a failure if flake8 finds linting errors or sufficiently
      serious code quality issues.
      """
      session.interpreter = 'python3.6'
      session.install('flake8')
      session.run('flake8',
                  ','.join(LINT_UNIT_DIR),
                  '--exclude=test_*')
  
  
  @nox.session
  def unit(session):
      """Run the unit test suite.
      
      Unit test files should be named like test_*.py and in the same directory
      as the file being tested.
      """
      session.interpreter = 'python3.6'
  
      # Run py.test against the unit tests.
      session.run(
          'py.test',
          '--quiet',
          ','.join(LINT_UNIT_DIR),
          *session.posargs
      )
  
subject: Remove missing "py" argument