13 files declare their use of ViewResultAssertionTrait in Drupal 9

CommentFieldNameTest.php in core/modules/comment/tests/src/Kernel/Views/CommentFieldNameTest.php

FilterAndArgumentUserUidTest.php in core/modules/comment/tests/src/Kernel/Views/FilterAndArgumentUserUidTest.php

FilterUidRevisionTest.php in core/modules/node/tests/src/Kernel/Views/FilterUidRevisionTest.php

RelationshipRepresentativeNodeTest.php in core/modules/user/tests/src/Kernel/Views/RelationshipRepresentativeNodeTest.php

RelationshipUserFileDataTest.php in core/modules/file/tests/src/Kernel/Views/RelationshipUserFileDataTest.php

RevisionRelationshipsTest.php in core/modules/block_content/tests/src/Kernel/Views/RevisionRelationshipsTest.php

RevisionUidTest.php in core/modules/node/tests/src/Kernel/Views/RevisionUidTest.php

RevisionUserTest.php in core/modules/media/tests/src/Kernel/Views/RevisionUserTest.php

RevisionUserTest.php in core/modules/block_content/tests/src/Kernel/Views/RevisionUserTest.php

TrackerUserUidTest.php in core/modules/tracker/tests/src/Kernel/Views/TrackerUserUidTest.php

ViewsKernelTestBase.php in core/modules/views/tests/src/Kernel/ViewsKernelTestBase.php

ViewTestBase.php in core/modules/views/tests/src/Functional/ViewTestBase.php

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