6 files declare their use of ConfigFactoryOverrideInterface in Zircon Profile 8

CacheabilityMetadataConfigOverride.php in core/modules/config/tests/config_override_integration_test/src/CacheabilityMetadataConfigOverride.php

Contains \Drupal\config_override_integration_test\CacheabilityMetadataConfigOverride.

ConfigOverrider.php in core/modules/config/tests/config_entity_static_cache_test/src/ConfigOverrider.php

Contains \Drupal\config_entity_static_cache_test\ConfigOverrider.

ConfigOverrider.php in core/modules/config/tests/config_override_test/src/ConfigOverrider.php

Contains \Drupal\config_override_test\ConfigOverrider.

ConfigOverriderLowPriority.php in core/modules/config/tests/config_override_test/src/ConfigOverriderLowPriority.php

Contains \Drupal\config_override_test\ConfigOverriderLowPriority.

LanguageConfigFactoryOverrideInterface.php in core/modules/language/src/Config/LanguageConfigFactoryOverrideInterface.php

Contains \Drupal\language\Config\LanguageConfigFactoryOverrideInterface.

PirateDayCacheabilityMetadataConfigOverride.php in core/modules/config/tests/config_override_test/src/PirateDayCacheabilityMetadataConfigOverride.php

Contains \Drupal\config_override_test\PirateDayCacheabilityMetadataConfigOverride.