old_contents: # Licensed to the Software Freedom Conservancy (SFC) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The SFC licenses this file
  # to you 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.
  
  import pytest
  
  from selenium.common.exceptions import WebDriverException
  from selenium.webdriver.firefox.firefox_binary import FirefoxBinary
  
  
  @pytest.fixture(params=['foo', FirefoxBinary(firefox_path='foo')],
                  ids=['string', 'binary'])
  def driver_kwargs(request, driver_kwargs):
      driver_kwargs['firefox_binary'] = request.param
      return driver_kwargs
  
  
  def test_invalid_binary(driver_class, driver_kwargs):
      with pytest.raises(WebDriverException) as excinfo:
          driver_class(**driver_kwargs)
      assert 'Unable to find a matching set of capabilities' in str(excinfo.value)
  
new_contents: # Licensed to the Software Freedom Conservancy (SFC) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The SFC licenses this file
  # to you 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.
  
  import pytest
  
  from selenium.common.exceptions import WebDriverException
  from selenium.webdriver.firefox.firefox_binary import FirefoxBinary
  
  
  @pytest.fixture(params=['foo', FirefoxBinary(firefox_path='foo')],
                  ids=['string', 'binary'])
  def driver_kwargs(request, driver_kwargs):
      driver_kwargs['firefox_binary'] = request.param
      return driver_kwargs
  
  
  @pytest.mark.xfail(reason='https://github.com/mozilla/geckodriver/issues/832')
  def test_invalid_binary(driver_class, driver_kwargs):
      with pytest.raises(WebDriverException) as excinfo:
          driver_class(**driver_kwargs)
      assert 'no such file or directory' in str(excinfo.value)
  
subject: revert fix for ff mn binary test, xfail with bug linked as reason