12 methods override FileTestBase::setUp() in Drupal 9

DownloadTest::setUp in core/modules/migrate/tests/src/Kernel/process/DownloadTest.php

FileCopyTest::setUp in core/modules/migrate/tests/src/Kernel/process/FileCopyTest.php

FileUrlGeneratorTest::setUp in core/tests/Drupal/KernelTests/Core/File/FileUrlGeneratorTest.php

NameMungingTest::setUp in core/tests/Drupal/KernelTests/Core/File/NameMungingTest.php

RemoteFileDeleteRecursiveTest::setUp in core/tests/Drupal/KernelTests/Core/File/RemoteFileDeleteRecursiveTest.php

RemoteFileDeleteTest::setUp in core/tests/Drupal/KernelTests/Core/File/RemoteFileDeleteTest.php

RemoteFileDirectoryTest::setUp in core/tests/Drupal/KernelTests/Core/File/RemoteFileDirectoryTest.php

RemoteFileMoveTest::setUp in core/tests/Drupal/KernelTests/Core/File/RemoteFileMoveTest.php

RemoteFileSaveDataTest::setUp in core/tests/Drupal/KernelTests/Core/File/RemoteFileSaveDataTest.php

RemoteFileUnmanagedCopyTest::setUp in core/tests/Drupal/KernelTests/Core/File/RemoteFileUnmanagedCopyTest.php

ScanDirectoryTest::setUp in core/tests/Drupal/KernelTests/Core/File/ScanDirectoryTest.php

StreamWrapperTest::setUp in core/tests/Drupal/KernelTests/Core/File/StreamWrapperTest.php