7 files declare their use of EntityBrowserTrait in Lightning Media 8.3

CKEditorMediaBrowserTest.php in tests/src/FunctionalJavascript/CKEditorMediaBrowserTest.php

EmbeddedMediaTest.php in tests/src/FunctionalJavascript/EmbeddedMediaTest.php

ImageBrowserCardinalityTest.php in modules/lightning_media_image/tests/src/FunctionalJavascript/ImageBrowserCardinalityTest.php

ImageBrowserTest.php in tests/src/FunctionalJavascript/ImageBrowserTest.php

ImageMediaTest.php in tests/src/Functional/ImageMediaTest.php

MediaBrowserWidgetDisambiguationTest.php in tests/src/FunctionalJavascript/MediaBrowserWidgetDisambiguationTest.php

SlideshowTest.php in modules/lightning_media_slideshow/tests/src/FunctionalJavascript/SlideshowTest.php