17 files declare their use of CronRunTrait

AggregatorCronTest.php in core/modules/aggregator/tests/src/Functional/AggregatorCronTest.php
BrowserTestBaseTest.php in core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
CronRunTest.php in core/modules/system/tests/src/Functional/System/CronRunTest.php
FeedLanguageTest.php in core/modules/aggregator/tests/src/Functional/FeedLanguageTest.php
FieldUpdateTest.php in core/modules/field/tests/src/Functional/Update/FieldUpdateTest.php
HelpTopicSearchTest.php in core/modules/help_topics/tests/src/Functional/HelpTopicSearchTest.php
LocaleUpdateCronTest.php in core/modules/locale/tests/src/Functional/LocaleUpdateCronTest.php
ReEnableModuleFieldTest.php in core/modules/field/tests/src/Functional/ReEnableModuleFieldTest.php
SearchCommentTest.php in core/modules/search/tests/src/Functional/SearchCommentTest.php
SearchIntegrationTest.php in core/modules/views/tests/src/Functional/SearchIntegrationTest.php
SearchMultilingualTest.php in core/modules/views/tests/src/Functional/SearchMultilingualTest.php
SearchNumberMatchingTest.php in core/modules/search/tests/src/Functional/SearchNumberMatchingTest.php
SearchNumbersTest.php in core/modules/search/tests/src/Functional/SearchNumbersTest.php
SearchRankingTest.php in core/modules/search/tests/src/Functional/SearchRankingTest.php
StatisticsAdminTest.php in core/modules/statistics/tests/src/Functional/StatisticsAdminTest.php
UpdateCoreTest.php in core/modules/update/tests/src/Functional/UpdateCoreTest.php
WebTestBase.php in core/modules/simpletest/src/WebTestBase.php

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