7 files declare their use of Item in Zircon Profile 8

AggregatorItemViewsFieldAccessTest.php in core/modules/aggregator/src/Tests/Views/AggregatorItemViewsFieldAccessTest.php

Contains \Drupal\aggregator\Tests\Views\AggregatorItemViewsFieldAccessTest.

AggregatorTitleTest.php in core/modules/aggregator/src/Tests/AggregatorTitleTest.php

Contains \Drupal\aggregator\Tests\AggregatorTitleTest.

FeedProcessorPluginTest.php in core/modules/aggregator/src/Tests/FeedProcessorPluginTest.php

Contains \Drupal\aggregator\Tests\FeedProcessorPluginTest.

ItemCacheTagsTest.php in core/modules/aggregator/src/Tests/ItemCacheTagsTest.php

Contains \Drupal\aggregator\Tests\ItemCacheTagsTest.

ItemWithoutFeedTest.php in core/modules/aggregator/src/Tests/ItemWithoutFeedTest.php

Contains \Drupal\aggregator\Tests\ItemWithoutFeedTest.

MigrateAggregatorItemTest.php in core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorItemTest.php

Contains \Drupal\aggregator\Tests\Migrate\d6\MigrateAggregatorItemTest.

MigrateAggregatorItemTest.php in core/modules/aggregator/src/Tests/Migrate/d7/MigrateAggregatorItemTest.php

Contains \Drupal\aggregator\Tests\Migrate\d7\MigrateAggregatorItemTest.