6 files declare their use of DynamicPageCacheSubscriber

AnnouncementsCacheTest.php in core/modules/announcements_feed/tests/src/Functional/AnnouncementsCacheTest.php
DynamicPageCacheIntegrationTest.php in core/modules/dynamic_page_cache/tests/src/Functional/DynamicPageCacheIntegrationTest.php
StandardTestTrait.php in core/profiles/standard/tests/src/Traits/StandardTestTrait.php
StyleTableTest.php in core/modules/views/tests/src/Functional/Plugin/StyleTableTest.php
UserBlocksTest.php in core/modules/user/tests/src/Functional/UserBlocksTest.php
WorkspaceSwitcherTest.php in core/modules/workspaces/tests/src/Functional/WorkspaceSwitcherTest.php

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