11 files declare their use of TMGMTTestBase in Translation Management Tool 8

ConfigSourceListTest.php in sources/tmgmt_config/tests/src/Functional/ConfigSourceListTest.php

ConfigSourceUiTest.php in sources/tmgmt_config/tests/src/Functional/ConfigSourceUiTest.php

ContentEntitySourceContentModerationTest.php in sources/content/tests/src/Functional/ContentEntitySourceContentModerationTest.php

ContentEntitySourceTranslatableEntityTest.php in sources/content/tests/src/Functional/ContentEntitySourceTranslatableEntityTest.php

ContentTmgmtEntitySourceListTest.php in sources/content/tests/src/Functional/ContentTmgmtEntitySourceListTest.php

ContentTmgmtEntitySourceNoCanonicalLinkTest.php in sources/content/tests/src/Functional/ContentTmgmtEntitySourceNoCanonicalLinkTest.php

ContentTmgmtEntitySourceUiTest.php in sources/content/tests/src/Functional/ContentTmgmtEntitySourceUiTest.php

FileTranslatorTest.php in translators/tmgmt_file/tests/src/Functional/FileTranslatorTest.php

LocaleSourceUiTest.php in sources/locale/tests/src/Functional/LocaleSourceUiTest.php

LocalTranslatorTestBase.php in translators/tmgmt_local/tests/src/Functional/LocalTranslatorTestBase.php

TMGMTDemoTest.php in modules/demo/tests/src/Functional/TMGMTDemoTest.php