10 invocations of hook_runtime_requirements()

FileSystemRequirementsTest::checkSystemRequirements in core/tests/Drupal/KernelTests/Core/File/FileSystemRequirementsTest.php
Checks system runtime requirements.
NodeRequirementsStatusFilterWarningTest::getRequirements in core/modules/node/tests/src/Kernel/NodeRequirementsStatusFilterWarningTest.php
Get requirements by the Node module.
RequirementsTest::testUploadRequirements in core/modules/file/tests/src/Kernel/RequirementsTest.php
Tests the file upload requirements.
SitesDirectoryHardeningTest::checkSystemRequirements in core/modules/system/tests/src/Functional/System/SitesDirectoryHardeningTest.php
Checks system runtime requirements.
SystemManager::listRequirements in core/modules/system/src/SystemManager.php
Displays the site status report. Can also be used as a pure check.
UpdateHooks::pageTop in core/modules/update/src/Hook/UpdateHooks.php
Implements hook_page_top().
UserRequirementsTest::testBlankUserEmails in core/modules/user/tests/src/Kernel/UserRequirementsTest.php
Tests that the requirements check does not incorrectly flag blank emails.
UserRequirementsTest::testConflictingUserEmails in core/modules/user/tests/src/Kernel/UserRequirementsTest.php
Tests that the requirements check can detect conflicting user emails.
UserRequirementsTest::testTranslatedUserEmail in core/modules/user/tests/src/Kernel/UserRequirementsTest.php
Tests that the requirements check does not flag user translations.
_update_cron_notify in core/modules/update/update.fetch.inc
Performs any notifications that should be done once cron fetches new data.

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