Issue #2791163 by alexpott, dawehner: Random automatic testing failures on SQLite with PHP 5.5

core/includes/bootstrap.inc

core/lib/Drupal/Core/Command/DbDumpCommand.php

core/lib/Drupal/Core/DrupalKernel.php

core/lib/Drupal/Core/Test/TestDatabase.php

core/modules/simpletest/simpletest.module

core/modules/simpletest/src/TestBase.php

core/modules/simpletest/src/Tests/SimpleTestBrowserTest.php

core/modules/simpletest/src/Tests/SimpleTestTest.php

core/modules/simpletest/src/WebTestBase.php

core/scripts/run-tests.sh

core/tests/Drupal/KernelTests/KernelTestBase.php

core/tests/Drupal/KernelTests/KernelTestBaseTest.php

core/tests/Drupal/Tests/BrowserTestBase.php

core/tests/Drupal/Tests/Core/Test/TestDatabaseTest.php