15 files declare their use of FileSystemModuleDiscoveryDataProviderTrait

AutoconfigurationTest.php in core/tests/Drupal/KernelTests/Core/DependencyInjection/AutoconfigurationTest.php
AutowireTest.php in core/tests/Drupal/KernelTests/Core/DependencyInjection/AutowireTest.php
DefaultConfigTest.php in core/tests/Drupal/KernelTests/Config/DefaultConfigTest.php
DestinationCategoryTest.php in core/modules/migrate_drupal/tests/src/Kernel/Plugin/migrate/DestinationCategoryTest.php
GenericTestExistsTest.php in core/tests/Drupal/Tests/Core/Extension/GenericTestExistsTest.php
MigrateDrupal6AuditIdsTest.php in core/modules/migrate_drupal/tests/src/Kernel/d6/MigrateDrupal6AuditIdsTest.php
MigrateDrupal7AuditIdsTest.php in core/modules/migrate_drupal/tests/src/Kernel/d7/MigrateDrupal7AuditIdsTest.php
MigrationLabelExistTest.php in core/modules/migrate_drupal_ui/tests/src/Kernel/MigrationLabelExistTest.php
MigrationProcessTest.php in core/modules/migrate_drupal/tests/src/Kernel/d6/MigrationProcessTest.php
MigrationProcessTest.php in core/modules/migrate_drupal/tests/src/Kernel/d7/MigrationProcessTest.php
MigrationProvidersExistTest.php in core/modules/migrate/tests/src/Kernel/Plugin/MigrationProvidersExistTest.php
ModuleConfigureRouteTest.php in core/tests/Drupal/KernelTests/Core/Extension/ModuleConfigureRouteTest.php
ModuleInfoTest.php in core/tests/Drupal/Tests/Core/Extension/ModuleInfoTest.php
StateFileExistsTest.php in core/modules/migrate_drupal/tests/src/Kernel/StateFileExistsTest.php
ValidateMigrationStateTestTrait.php in core/modules/migrate_drupal/tests/src/Traits/ValidateMigrationStateTestTrait.php

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