6 files declare their use of Condition in Search API 8

AllTermsArgumentTest.php in tests/src/Unit/Views/AllTermsArgumentTest.php

FieldsProcessorPluginBaseTest.php in tests/src/Unit/Processor/FieldsProcessorPluginBaseTest.php

HtmlFilterTest.php in tests/src/Unit/Processor/HtmlFilterTest.php

IgnoreCaseTest.php in tests/src/Unit/Processor/IgnoreCaseTest.php

IgnoreCharacterTest.php in tests/src/Unit/Processor/IgnoreCharacterTest.php

StemmerTest.php in tests/src/Unit/Processor/StemmerTest.php