diff -u b/modules/ubercart/src/Plugin/migrate/source/Currency.php b/modules/ubercart/src/Plugin/migrate/source/Currency.php
--- b/modules/ubercart/src/Plugin/migrate/source/Currency.php
+++ b/modules/ubercart/src/Plugin/migrate/source/Currency.php
@@ -16,7 +16,8 @@
  * Gets the ubercart currency data.
  *
  * @MigrateSource(
- *   id = "ubercart_currency"
+ *   id = "ubercart_currency",
+ *   source_provider = "uc_store"
  * )
  */
 class Currency extends Variable {
diff -u b/modules/ubercart/src/Plugin/migrate/source/Store.php b/modules/ubercart/src/Plugin/migrate/source/Store.php
--- b/modules/ubercart/src/Plugin/migrate/source/Store.php
+++ b/modules/ubercart/src/Plugin/migrate/source/Store.php
@@ -9,7 +9,8 @@
  * Gets the ubercart store data.
  *
  * @MigrateSource(
- *   id = "ubercart_store"
+ *   id = "ubercart_store",
+ *   source_provider = "uc_store"
  * )
  */
 class Store extends Variable {
diff -u b/modules/ubercart/src/Plugin/migrate/source/d6/Order.php b/modules/ubercart/src/Plugin/migrate/source/d6/Order.php
--- b/modules/ubercart/src/Plugin/migrate/source/d6/Order.php
+++ b/modules/ubercart/src/Plugin/migrate/source/d6/Order.php
@@ -9,7 +9,8 @@
  * Provides migration source for orders.
  *
  * @MigrateSource(
- *   id = "d6_ubercart_order"
+ *   id = "d6_ubercart_order",
+ *   source_provider = "uc_order"
  * )
  */
 class Order extends SqlBase {
diff -u b/modules/ubercart/src/Plugin/migrate/source/d6/OrderProduct.php b/modules/ubercart/src/Plugin/migrate/source/d6/OrderProduct.php
--- b/modules/ubercart/src/Plugin/migrate/source/d6/OrderProduct.php
+++ b/modules/ubercart/src/Plugin/migrate/source/d6/OrderProduct.php
@@ -6,8 +6,11 @@
 use Drupal\migrate\Row;
 
 /**
+ * Drupal 6 ubercart order product source.
+ *
  * @MigrateSource(
- *   id = "d6_ubercart_order_product"
+ *   id = "d6_ubercart_order_product",
+ *   source_provider = "uc_order"
  * )
  */
 class OrderProduct extends SqlBase {
@@ -17,7 +20,15 @@
    */
   public function query() {
     $query = $this->select('uc_order_products', 'uop')
-      ->fields('uop', ['order_product_id', 'order_id', 'nid', 'title', 'qty', 'price', 'data']);
+      ->fields('uop', [
+        'order_product_id',
+        'order_id',
+        'nid',
+        'title',
+        'qty',
+        'price',
+        'data',
+      ]);
     $query->innerJoin('uc_orders', 'uo', 'uop.order_id = uo.order_id');
     $query->fields('uo', ['created', 'modified', 'currency']);
 
diff -u b/modules/ubercart/src/Plugin/migrate/source/d6/Product.php b/modules/ubercart/src/Plugin/migrate/source/d6/Product.php
--- b/modules/ubercart/src/Plugin/migrate/source/d6/Product.php
+++ b/modules/ubercart/src/Plugin/migrate/source/d6/Product.php
@@ -2,15 +2,15 @@
 
 namespace Drupal\commerce_migrate_ubercart\Plugin\migrate\source\d6;
 
-use Drupal\Core\State\StateInterface;
-use Drupal\migrate\MigrateException;
 use Drupal\migrate\Plugin\migrate\source\SqlBase;
-use Drupal\migrate\Plugin\MigrationInterface;
 use Drupal\migrate\Row;
 
 /**
+ * Drupal 6 ubercart product source.
+ *
  * @MigrateSource(
- *   id = "d6_ubercart_product"
+ *   id = "d6_ubercart_product",
+ *   source_provider = "uc_product"
  * )
  */
 class Product extends SqlBase {
diff -u b/modules/ubercart/src/Plugin/migrate/source/d6/ProductVariation.php b/modules/ubercart/src/Plugin/migrate/source/d6/ProductVariation.php
--- b/modules/ubercart/src/Plugin/migrate/source/d6/ProductVariation.php
+++ b/modules/ubercart/src/Plugin/migrate/source/d6/ProductVariation.php
@@ -6,8 +6,11 @@
 use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;
 
 /**
+ * Drupal 6 ubercart product variation sourcee.
+ *
  * @MigrateSource(
- *   id = "d6_ubercart_product_variation"
+ *   id = "d6_ubercart_product_variation",
+ *   source_provider = "uc_product"
  * )
  */
 class ProductVariation extends DrupalSqlBase {
diff -u b/modules/ubercart/tests/src/Kernel/Migrate/d6/CurrencyTest.php b/modules/ubercart/tests/src/Kernel/Migrate/d6/CurrencyTest.php
--- b/modules/ubercart/tests/src/Kernel/Migrate/d6/CurrencyTest.php
+++ b/modules/ubercart/tests/src/Kernel/Migrate/d6/CurrencyTest.php
@@ -8,6 +8,7 @@
  * Tests currency migration.
  *
  * @group commerce_migrate
+ * @group commerce_migrate_ubercart6
  */
 class CurrencyTest extends Ubercart6TestBase {
 
diff -u b/modules/ubercart/tests/src/Kernel/Migrate/d6/MigrateProfileBillingTest.php b/modules/ubercart/tests/src/Kernel/Migrate/d6/MigrateProfileBillingTest.php
--- b/modules/ubercart/tests/src/Kernel/Migrate/d6/MigrateProfileBillingTest.php
+++ b/modules/ubercart/tests/src/Kernel/Migrate/d6/MigrateProfileBillingTest.php
@@ -8,7 +8,8 @@
 /**
  * Tests billing profile migration.
  *
- * @group commerce_migrate_ubercart
+ * @group commerce_migrate
+ * @group commerce_migrate_ubercart6
  */
 class MigrateProfileBillingTest extends Ubercart6TestBase {
 
diff -u b/modules/ubercart/tests/src/Kernel/Migrate/d6/OrderItemTest.php b/modules/ubercart/tests/src/Kernel/Migrate/d6/OrderItemTest.php
--- b/modules/ubercart/tests/src/Kernel/Migrate/d6/OrderItemTest.php
+++ b/modules/ubercart/tests/src/Kernel/Migrate/d6/OrderItemTest.php
@@ -9,6 +9,7 @@
  * Tests order item migration.
  *
  * @group commerce_migrate
+ * @group commerce_migrate_ubercart6
  */
 class OrderItemTest extends Ubercart6TestBase {
 
diff -u b/modules/ubercart/tests/src/Kernel/Migrate/d6/OrderTest.php b/modules/ubercart/tests/src/Kernel/Migrate/d6/OrderTest.php
--- b/modules/ubercart/tests/src/Kernel/Migrate/d6/OrderTest.php
+++ b/modules/ubercart/tests/src/Kernel/Migrate/d6/OrderTest.php
@@ -1,14 +1,15 @@
 <?php
 
-namespace Drupal\Tests\commerce_migrate\Kernel\d6\Ubercart;
+namespace Drupal\Tests\commerce_migrate_ubercart\Kernel\Migrate\d6;
 
 use Drupal\commerce_order\Entity\Order;
 use Drupal\Tests\commerce_migrate\Kernel\CommerceMigrateTestTrait;
 
 /**
- * Tests billing profile migration.
+ * Tests order migration.
  *
  * @group commerce_migrate
+ * @group commerce_migrate_ubercart6
  */
 class OrderTest extends Ubercart6TestBase {
 
diff -u b/modules/ubercart/tests/src/Kernel/Migrate/d6/ProductTest.php b/modules/ubercart/tests/src/Kernel/Migrate/d6/ProductTest.php
--- b/modules/ubercart/tests/src/Kernel/Migrate/d6/ProductTest.php
+++ b/modules/ubercart/tests/src/Kernel/Migrate/d6/ProductTest.php
@@ -8,6 +8,7 @@
  * Tests Product migration.
  *
  * @group commerce_migrate
+ * @group commerce_migrate_ubercart6
  */
 class ProductTest extends Ubercart6TestBase {
 
@@ -58 +58,0 @@
-
diff -u b/modules/ubercart/tests/src/Kernel/Migrate/d6/ProductVariationTest.php b/modules/ubercart/tests/src/Kernel/Migrate/d6/ProductVariationTest.php
--- b/modules/ubercart/tests/src/Kernel/Migrate/d6/ProductVariationTest.php
+++ b/modules/ubercart/tests/src/Kernel/Migrate/d6/ProductVariationTest.php
@@ -8,6 +8,7 @@
  * Tests Product migration.
  *
  * @group commerce_migrate
+ * @group commerce_migrate_ubercart6
  */
 class ProductVariationTest extends Ubercart6TestBase {
 
diff -u b/modules/ubercart/tests/src/Kernel/Migrate/d6/StoreTest.php b/modules/ubercart/tests/src/Kernel/Migrate/d6/StoreTest.php
--- b/modules/ubercart/tests/src/Kernel/Migrate/d6/StoreTest.php
+++ b/modules/ubercart/tests/src/Kernel/Migrate/d6/StoreTest.php
@@ -9,6 +9,7 @@
  * Tests store migration.
  *
  * @group commerce_migrate
+ * @group commerce_migrate_ubercart6
  */
 class StoreTest extends Ubercart6TestBase {
 
diff -u b/modules/ubercart/tests/src/Kernel/Migrate/d6/Ubercart6TestBase.php b/modules/ubercart/tests/src/Kernel/Migrate/d6/Ubercart6TestBase.php
--- b/modules/ubercart/tests/src/Kernel/Migrate/d6/Ubercart6TestBase.php
+++ b/modules/ubercart/tests/src/Kernel/Migrate/d6/Ubercart6TestBase.php
@@ -33,7 +33,7 @@
   ];
 
   /**
-   * @inheritDoc
+   * {@inheritdoc}
    */
   protected function setUp() {
     parent::setUp();
diff -u b/modules/ubercart/tests/src/Kernel/Migrate/d7/CurrencyTest.php /dev/null
--- b/modules/ubercart/tests/src/Kernel/Migrate/d7/CurrencyTest.php
+++ /dev/null
@@ -1,51 +0,0 @@
-<?php
-
-namespace Drupal\Tests\commerce_migrate_ubercart\Kernel\Migrate\d7;
-
-use Drupal\commerce_price\Entity\Currency;
-use Drupal\commerce_price\Entity\CurrencyInterface;
-
-/**
- * Tests currency migration.
- *
- * @group commerce_migrate
- */
-class CurrencyTest extends Ubercart7TestBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  protected function setUp() {
-    parent::setUp();
-    $this->executeMigration('ubercart_currency');
-  }
-
-  /**
-   * Test currency migration from Drupal 7 to 8.
-   */
-  public function testCurrency() {
-    /** @var \Drupal\commerce_price\Entity\CurrencyInterface $currency */
-    $this->assertCurrencyEntity('USD', 'USD', 'US Dollar', '840', 2, '$');
-  }
-
-  /**
-   * @param string $id
-   *   The currency id.
-   * @param $expected_currency_code
-   * @param $expected_name
-   * @param $expected_numeric_code
-   * @param $expected_fraction_digits
-   * @param $expected_symbol
-   */
-  public function assertCurrencyEntity($id, $expected_currency_code, $expected_name, $expected_numeric_code, $expected_fraction_digits, $expected_symbol) {
-    /** @var \Drupal\commerce_price\Entity\CurrencyInterface $currency */
-    $currency = Currency::load($id);
-    $this->assertInstanceOf(CurrencyInterface::class, $currency);
-    $this->assertSame($expected_currency_code, $currency->getCurrencyCode());
-    $this->assertSame($expected_name, $currency->getName());
-    $this->assertSame($expected_fraction_digits, $currency->getFractionDigits());
-    $this->assertSame($expected_numeric_code, $currency->getNumericCode());
-    $this->assertSame($expected_symbol, $currency->getSymbol());
-  }
-
-}
diff -u b/modules/ubercart/tests/src/Kernel/Migrate/d7/StoreTest.php b/modules/ubercart/tests/src/Kernel/Migrate/d7/StoreTest.php
--- b/modules/ubercart/tests/src/Kernel/Migrate/d7/StoreTest.php
+++ b/modules/ubercart/tests/src/Kernel/Migrate/d7/StoreTest.php
@@ -9,6 +9,7 @@
  * Tests store migration.
  *
  * @group commerce_migrate
+ * @group commerce_migrate_ubercart7
  */
 class StoreTest extends Ubercart7TestBase {
 
@@ -23,7 +24,7 @@
       'd7_user_role',
       'd7_user',
       'ubercart_currency',
-      'd7_ubercart_store'
+      'd7_ubercart_store',
     ]);
   }
 
only in patch2:
unchanged:
--- a/modules/ubercart/src/Plugin/migrate/source/d6/BillingProfile.php
+++ b/modules/ubercart/src/Plugin/migrate/source/d6/BillingProfile.php
@@ -9,7 +9,8 @@ use Drupal\migrate\Row;
  * Drupal 6 ubercart billing profile source.
  *
  * @MigrateSource(
- *   id = "d6_ubercart_billing_profile"
+ *   id = "d6_ubercart_billing_profile",
+ *   source_provider = "uc_order"
  * )
  */
 class BillingProfile extends SqlBase {