23 files declare their use of TestCase in Zircon Profile 8

BasicAuthTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/BasicAuthTest.php

BestPracticesTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/BestPracticesTest.php

ChangeEventTest.php in vendor/behat/mink/driver-testsuite/tests/Js/ChangeEventTest.php

CheckboxTest.php in vendor/behat/mink/driver-testsuite/tests/Form/CheckboxTest.php

ContentTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/ContentTest.php

CookieTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/CookieTest.php

ErrorHandlingTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/ErrorHandlingTest.php

EventsTest.php in vendor/behat/mink/driver-testsuite/tests/Js/EventsTest.php

GeneralTest.php in vendor/behat/mink/driver-testsuite/tests/Form/GeneralTest.php

HeaderTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/HeaderTest.php

HoverTest.php in vendor/behat/mink/driver-testsuite/tests/Css/HoverTest.php

Html5Test.php in vendor/behat/mink/driver-testsuite/tests/Form/Html5Test.php

IFrameTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/IFrameTest.php

JavascriptEvaluationTest.php in vendor/behat/mink/driver-testsuite/tests/Js/JavascriptEvaluationTest.php

JavascriptTest.php in vendor/behat/mink/driver-testsuite/tests/Js/JavascriptTest.php

NavigationTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/NavigationTest.php

RadioTest.php in vendor/behat/mink/driver-testsuite/tests/Form/RadioTest.php

ScreenshotTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/ScreenshotTest.php

SelectTest.php in vendor/behat/mink/driver-testsuite/tests/Form/SelectTest.php

StatusCodeTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/StatusCodeTest.php

TraversingTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/TraversingTest.php

VisibilityTest.php in vendor/behat/mink/driver-testsuite/tests/Basic/VisibilityTest.php

WindowTest.php in vendor/behat/mink/driver-testsuite/tests/Js/WindowTest.php