14 files declare their use of Session in Zircon Profile 8

BasePhantomJSDriver.php in vendor/jcalderonzumba/mink-phantomjs-driver/src/BasePhantomJSDriver.php

BaseUrlTest.php in vendor/behat/mink-browserkit-driver/tests/Custom/BaseUrlTest.php

BrowserTestBase.php in core/modules/simpletest/src/BrowserTestBase.php

Contains \Drupal\simpletest\BrowserTestBase.

CoreDriver.php in vendor/behat/mink/src/Driver/CoreDriver.php

DriverInterface.php in vendor/behat/mink/src/Driver/DriverInterface.php

Element.php in vendor/behat/mink/src/Element/Element.php

ElementHtmlException.php in vendor/behat/mink/src/Exception/ElementHtmlException.php

ElementInterface.php in vendor/behat/mink/src/Element/ElementInterface.php

ElementNotFoundException.php in vendor/behat/mink/src/Exception/ElementNotFoundException.php

ElementTest.php in vendor/behat/mink/tests/Element/ElementTest.php

ExpectationException.php in vendor/behat/mink/src/Exception/ExpectationException.php

NodeElement.php in vendor/behat/mink/src/Element/NodeElement.php

SessionTest.php in vendor/behat/mink/tests/SessionTest.php

TestCase.php in vendor/behat/mink/driver-testsuite/tests/TestCase.php