diff -u b/core/modules/config_translation/src/Plugin/migrate/source/d6/I18nProfileField.php b/core/modules/config_translation/src/Plugin/migrate/source/d6/I18nProfileField.php
--- b/core/modules/config_translation/src/Plugin/migrate/source/d6/I18nProfileField.php
+++ b/core/modules/config_translation/src/Plugin/migrate/source/d6/I18nProfileField.php
@@ -12,7 +12,7 @@
  *   source_provider = "profile"
  * )
  */
-class i18nProfileField extends DrupalSqlBase {
+class I18nProfileField extends DrupalSqlBase {
 
   /**
    * {@inheritdoc}
reverted:
--- b/core/modules/config_translation/tests/src/Unit/Plugin/migrate/source/d6/I18nProfileFieldTest.php
+++ /dev/null
@@ -1,83 +0,0 @@
-<?php
-
-namespace Drupal\Tests\config_translation\Unit\Plugin\migrate\source\d6;
-
-use Drupal\Tests\migrate\Unit\MigrateSqlSourceTestCase;
-
-/**
- * Tests the i18nProfileField source plugin.
- *
- * @group migrate_drupal
- */
-class I18nProfileFieldTest extends MigrateSqlSourceTestCase {
-
-  const PLUGIN_CLASS = 'Drupal\config_translation\Plugin\migrate\source\d6\I18nProfileField';
-
-  protected $migrationConfiguration = [
-    'id' => 'test',
-    'source' => [
-      'plugin' => 'd6_i18n_profile_field',
-    ],
-  ];
-
-  protected $databaseContents = [
-    'profile_fields' => [
-      [
-        'fid' => 42,
-        'title' => 'I love migrations',
-        'name' => 'profile_love_migrations',
-      ],
-    ],
-    'i18n_strings' => [
-      [
-        'lid' => 10,
-        'objectid' => 'profile_love_migrations',
-        'type' => 'field',
-        'property' => 'title',
-      ],
-      [
-        'lid' => 11,
-        'objectid' => 'profile_love_migrations',
-        'type' => 'field',
-        'property' => 'explanation'
-      ]
-    ],
-    'locales_target' => [
-      [
-        'lid' => 10,
-        'translation' => "J'aime les migrations.",
-        'language' => 'fr',
-      ],
-      [
-        'lid' => 11,
-        'translation' => 'Si vous cochez cette case, vous aimez les migrations.',
-        'language' => 'fr',
-      ],
-    ],
-  ];
-
-  protected $expectedResults = [
-    [
-      'property' => 'title',
-      'translation' => "J'aime les migrations.",
-      'language' => 'fr',
-      'fid' => '42',
-      'name' => 'profile_love_migrations',
-    ],
-    [
-      'property' => 'explanation',
-      'translation' => 'Si vous cochez cette case, vous aimez les migrations.',
-      'language' => 'fr',
-      'fid' => '42',
-      'name' => 'profile_love_migrations',
-    ],
-  ];
-
-  /**
-  * {@inheritdoc}
-  */
-  protected function setUp() {
-    parent::setUp();
-  }
-
-}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/config_translation/tests/src/Plugin/migrate/source/d6/I18nProfileFieldTest.php
@@ -0,0 +1,82 @@
+<?php
+
+namespace Drupal\Tests\config_translation\Kernal\Plugin\migrate\source\d6;
+
+use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
+
+/**
+ * Tests the i18nProfileField source plugin.
+ *
+ * @covers \Drupal\config_translation\Plugin\migrate\source\d6\I18nProfileField
+ * @group migrate_drupal
+ */
+class I18nProfileFieldTest extends MigrateSqlSourceTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['config_translation', 'migrate_drupal', 'user'];
+
+  protected $databaseContents = [
+    'profile_fields' => [
+      [
+        'fid' => 42,
+        'title' => 'I love migrations',
+        'name' => 'profile_love_migrations',
+      ],
+    ],
+    'i18n_strings' => [
+      [
+        'lid' => 10,
+        'objectid' => 'profile_love_migrations',
+        'type' => 'field',
+        'property' => 'title',
+      ],
+      [
+        'lid' => 11,
+        'objectid' => 'profile_love_migrations',
+        'type' => 'field',
+        'property' => 'explanation'
+      ]
+    ],
+    'locales_target' => [
+      [
+        'lid' => 10,
+        'translation' => "J'aime les migrations.",
+        'language' => 'fr',
+      ],
+      [
+        'lid' => 11,
+        'translation' => 'Si vous cochez cette case, vous aimez les migrations.',
+        'language' => 'fr',
+      ],
+    ],
+  ];
+
+  protected $expectedResults = [
+    [
+      'property' => 'title',
+      'translation' => "J'aime les migrations.",
+      'language' => 'fr',
+      'fid' => '42',
+      'name' => 'profile_love_migrations',
+    ],
+    [
+      'property' => 'explanation',
+      'translation' => 'Si vous cochez cette case, vous aimez les migrations.',
+      'language' => 'fr',
+      'fid' => '42',
+      'name' => 'profile_love_migrations',
+    ],
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function providerSource() {
+    $test[0][0] = $this->databaseContents;
+    $test[0][1] = $this->expectedResults;
+    return $test;
+  }
+
+}