old_contents: """
  Copyright 2019 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
  
  BLACK_PATHS = ["google", "tests"]
  
  if os.path.exists("samples"):
      BLACK_PATHS.append("samples")
  
  
  @nox.session
  def lint(session):
      """Run linters.
      Returns a failure if the linters find linting errors or sufficiently
      serious code quality issues.
      """
      session.install("-r", "requirements-test.txt")
      session.install("-r", "requirements.txt")
      session.run("black", "--check", *BLACK_PATHS)
      session.run("flake8", "google", "tests")
      session.run("mypy", "google", "tests")
      session.run("python", "setup.py", "sdist")
      session.run("twine", "check", "dist/*")
  
  
  def default(session, path):
      # Install all test dependencies, then install this package in-place.
      session.install("-r", "requirements-test.txt")
      session.install("-e", ".")
      session.install("-r", "requirements.txt")
      # Run py.test against the unit tests.
      session.run(
          "py.test",
          "--cov=google/cloud/sql/connector",
          "-v",
          "--cov-config=.coveragerc",
          "--cov-report=",
          "--cov-fail-under=0",
          "--junitxml=sponge_log.xml",
          path,
          *session.posargs,
      )
  
  
  @nox.session(python=["3.7", "3.8", "3.9", "3.10"])
  def unit(session):
      default(session, os.path.join("tests", "unit"))
  
  
  @nox.session(python=["3.7", "3.8", "3.9", "3.10"])
  def system(session):
      default(session, os.path.join("tests", "system"))
  
  
  @nox.session(python=["3.7", "3.8", "3.9", "3.10"])
  def test(session):
      default(session, os.path.join("tests", "unit"))
      default(session, os.path.join("tests", "system"))
  
new_contents: """
  Copyright 2019 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
  
  BLACK_PATHS = ["google", "tests"]
  
  if os.path.exists("samples"):
      BLACK_PATHS.append("samples")
  
  
  @nox.session
  def lint(session):
      """Run linters.
      Returns a failure if the linters find linting errors or sufficiently
      serious code quality issues.
      """
      session.install("-r", "requirements-test.txt")
      session.install("-r", "requirements.txt")
      session.run("black", "--check", *BLACK_PATHS)
      session.run("flake8", "google", "tests")
      session.run("mypy", "google", "tests")
      session.run("python", "setup.py", "sdist")
      session.run("twine", "check", "dist/*")
  
  
  def default(session, path):
      # Install all test dependencies, then install this package in-place.
      session.install("-r", "requirements-test.txt")
      session.install("-e", ".")
      session.install("-r", "requirements.txt")
      # Run py.test against the unit tests.
      session.run(
          "pytest",
          "--cov=google/cloud/sql/connector",
          "-v",
          "--cov-config=.coveragerc",
          "--cov-report=",
          "--cov-fail-under=0",
          "--junitxml=sponge_log.xml",
          path,
          *session.posargs,
      )
  
  
  @nox.session(python=["3.7", "3.8", "3.9", "3.10"])
  def unit(session):
      default(session, os.path.join("tests", "unit"))
  
  
  @nox.session(python=["3.7", "3.8", "3.9", "3.10"])
  def system(session):
      default(session, os.path.join("tests", "system"))
  
  
  @nox.session(python=["3.7", "3.8", "3.9", "3.10"])
  def test(session):
      default(session, os.path.join("tests", "unit"))
      default(session, os.path.join("tests", "system"))
  
subject: update py.test to pytest (#467)