8 files declare their use of EntityTestMulRevPub in Drupal 9

ContentModerationSyncingTest.php in core/modules/content_moderation/tests/src/Kernel/ContentModerationSyncingTest.php

ContentTranslationWorkflowsTest.php in core/modules/content_translation/tests/src/Functional/ContentTranslationWorkflowsTest.php

DeleteActionTest.php in core/tests/Drupal/KernelTests/Core/Action/DeleteActionTest.php

DeleteMultipleFormTest.php in core/tests/Drupal/FunctionalTests/Entity/DeleteMultipleFormTest.php

EntityReferenceSupportedNewEntitiesConstraintValidatorTest.php in core/modules/workspaces/tests/src/Kernel/EntityReferenceSupportedNewEntitiesConstraintValidatorTest.php

ModerationInformationTest.php in core/modules/content_moderation/tests/src/Kernel/ModerationInformationTest.php

PublishActionTest.php in core/tests/Drupal/KernelTests/Core/Action/PublishActionTest.php

WorkspaceIntegrationTest.php in core/modules/workspaces/tests/src/Kernel/WorkspaceIntegrationTest.php