11 files declare their use of Flag in Flag 8.4

AccessTest.php in tests/src/Kernel/AccessTest.php

AnonymousFlagTest.php in tests/src/Functional/AnonymousFlagTest.php

FlagActionTest.php in tests/src/Kernel/FlagActionTest.php

FlagBookmarkInstallUninstallTest.php in modules/flag_bookmark/tests/src/Kernel/FlagBookmarkInstallUninstallTest.php

FlagContextualLinksTest.php in tests/src/FunctionalJavascript/FlagContextualLinksTest.php

FlagCountsTest.php in tests/src/Kernel/FlagCountsTest.php

FlagCreateTrait.php in tests/src/Traits/FlagCreateTrait.php

FlagFollowerInstallUninstallTest.php in modules/flag_follower/tests/src/Kernel/FlagFollowerInstallUninstallTest.php

FlagServiceTest.php in tests/src/Kernel/FlagServiceTest.php

FlagTestBase.php in tests/src/Functional/FlagTestBase.php

OutputLocationEntityFormAccessTest.php in tests/src/Functional/OutputLocationEntityFormAccessTest.php