6 methods override ConfigStorageTestBase::update() in Drupal 8

CachedStorageTest::update in core/tests/Drupal/KernelTests/Core/Config/Storage/CachedStorageTest.php

DatabaseStorageTest::update in core/tests/Drupal/KernelTests/Core/Config/Storage/DatabaseStorageTest.php

FileStorageTest::update in core/tests/Drupal/KernelTests/Core/Config/Storage/FileStorageTest.php

ManagedStorageTest::update in core/tests/Drupal/KernelTests/Core/Config/Storage/ManagedStorageTest.php

MemoryStorageTest::update in core/tests/Drupal/KernelTests/Core/Config/Storage/MemoryStorageTest.php

StorageReplaceDataWrapperTest::update in core/tests/Drupal/KernelTests/Core/Config/Storage/StorageReplaceDataWrapperTest.php