10 files declare their use of CommerceMigrateCoreTestTrait in Commerce Migrate 3.0.x

ImageTest.php in modules/magento/tests/src/Kernel/Migrate/magento2/ImageTest.php

NodeTest.php in modules/commerce/tests/src/Kernel/Migrate/commerce1/NodeTest.php

TaxonomyCategoriesTermTest.php in modules/woocommerce/tests/src/Kernel/Migrate/woo3/TaxonomyCategoriesTermTest.php

TaxonomyTagTermTest.php in modules/woocommerce/tests/src/Kernel/Migrate/woo3/TaxonomyTagTermTest.php

TaxonomyTermTest.php in modules/shopify/tests/src/Kernel/Migrate/TaxonomyTermTest.php

TaxonomyTermTest.php in modules/magento/tests/src/Kernel/Migrate/magento2/TaxonomyTermTest.php

TaxonomyVocabularyTest.php in modules/shopify/tests/src/Kernel/Migrate/TaxonomyVocabularyTest.php

TaxonomyVocabularyTest.php in modules/magento/tests/src/Kernel/Migrate/magento2/TaxonomyVocabularyTest.php

TaxonomyVocabularyTest.php in modules/woocommerce/tests/src/Kernel/Migrate/woo3/TaxonomyVocabularyTest.php

UserTest.php in modules/magento/tests/src/Kernel/Migrate/magento2/UserTest.php