6 files declare their use of EntityTestComputedField

ComputedFieldTest.php in core/modules/views/tests/src/Kernel/Handler/ComputedFieldTest.php
EntityComputedFieldTest.php in core/modules/system/tests/src/Functional/Entity/EntityComputedFieldTest.php
EntityFieldTest.php in core/tests/Drupal/KernelTests/Core/Entity/EntityFieldTest.php
EntitySerializationTest.php in core/modules/serialization/tests/src/Kernel/EntitySerializationTest.php
EntityTestComputedFieldTest.php in core/modules/jsonapi/tests/src/Functional/EntityTestComputedFieldTest.php
ResourceObjectNormalizerCacherTest.php in core/modules/jsonapi/tests/src/Kernel/EventSubscriber/ResourceObjectNormalizerCacherTest.php

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