24 files declare their use of GraphQLTestBase in GraphQL 8.4

BufferedFieldTest.php in tests/src/Kernel/Framework/BufferedFieldTest.php

DisabledResultCacheTest.php in tests/src/Kernel/Framework/DisabledResultCacheTest.php

EntityDefinitionTest.php in tests/src/Kernel/DataProducer/EntityDefinitionTest.php

EntityMultipleTest.php in tests/src/Kernel/DataProducer/EntityMultipleTest.php

EntityReferenceTest.php in tests/src/Kernel/DataProducer/EntityReferenceTest.php

EntityTest.php in tests/src/Kernel/DataProducer/EntityTest.php

ImageDerivativeTest.php in tests/src/Kernel/DataProducer/Entity/Fields/Image/ImageDerivativeTest.php

ImageResourceUrlTest.php in tests/src/Kernel/DataProducer/Images/ImageResourceUrlTest.php

ImageUrlTest.php in tests/src/Kernel/DataProducer/Entity/Fields/Image/ImageUrlTest.php

InvalidPayloadTest.php in tests/src/Kernel/Framework/InvalidPayloadTest.php

MenuTest.php in tests/src/Kernel/DataProducer/MenuTest.php

PermissionsTest.php in tests/src/Kernel/Framework/PermissionsTest.php

PersistedQueriesTest.php in tests/src/Kernel/Framework/PersistedQueriesTest.php

ResultCacheTest.php in tests/src/Kernel/Framework/ResultCacheTest.php

ResultTest.php in tests/src/Kernel/Framework/ResultTest.php

RouteEntityTest.php in tests/src/Kernel/DataProducer/Routing/RouteEntityTest.php

RoutingTest.php in tests/src/Kernel/DataProducer/RoutingTest.php

SeekTest.php in tests/src/Kernel/DataProducer/SeekTest.php

StringTest.php in tests/src/Kernel/DataProducer/StringTest.php

TestFrameworkTest.php in tests/src/Kernel/Framework/TestFrameworkTest.php

UploadFileServiceTest.php in tests/src/Kernel/Framework/UploadFileServiceTest.php

UploadMutationTest.php in tests/src/Kernel/Framework/UploadMutationTest.php

UserPermissionsContextTest.php in tests/src/Kernel/Framework/UserPermissionsContextTest.php

XMLTestBase.php in tests/src/Kernel/DataProducer/XML/XMLTestBase.php