diff --git a/core/modules/action/src/Tests/Migrate/d6/MigrateActionConfigsTest.php b/core/modules/action/src/Tests/Migrate/d6/MigrateActionConfigsTest.php
index b4b2540657e633ca4439cde488bed66e462e8fb8..779db2f8bfc615ddd75802636b188b6bcaf22e4f 100644
--- a/core/modules/action/src/Tests/Migrate/d6/MigrateActionConfigsTest.php
+++ b/core/modules/action/src/Tests/Migrate/d6/MigrateActionConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateActionConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_action_settings');
   }
 
diff --git a/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorConfigsTest.php b/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorConfigsTest.php
index 33d08934049d5bc2f55fbc04a9f0bed34fd7b0e5..7cef21066633090b64d2a680423af1b715be891c 100644
--- a/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorConfigsTest.php
+++ b/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateAggregatorConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_aggregator_settings');
   }
 
diff --git a/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorFeedTest.php b/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorFeedTest.php
index 2264e285b8d478c552f88e547d73fb97c617ad63..77f612724c96beb5f4100487d4cc3cf53eacc774 100644
--- a/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorFeedTest.php
+++ b/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorFeedTest.php
@@ -25,7 +25,6 @@ class MigrateAggregatorFeedTest extends MigrateDrupal6TestBase {
   protected function setUp() {
     parent::setUp();
     $this->installEntitySchema('aggregator_feed');
-    $this->loadDumps(['AggregatorFeed.php']);
     $this->executeMigration('d6_aggregator_feed');
   }
 
diff --git a/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorItemTest.php b/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorItemTest.php
index 20e4ad784d901085d3c35afd04e46a7048228a5d..3d5716c136308364f00e14acbe95242f29d8cdd7 100644
--- a/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorItemTest.php
+++ b/core/modules/aggregator/src/Tests/Migrate/d6/MigrateAggregatorItemTest.php
@@ -45,7 +45,6 @@ protected function setUp() {
     ));
     $entity->enforceIsNew();
     $entity->save();
-    $this->loadDumps(['AggregatorItem.php']);
     $this->executeMigration('d6_aggregator_item');
   }
 
diff --git a/core/modules/aggregator/src/Tests/Migrate/d7/MigrateAggregatorSettingsTest.php b/core/modules/aggregator/src/Tests/Migrate/d7/MigrateAggregatorSettingsTest.php
index b95835f39b0ad32b2e1df354f7d877dc4f446ad4..37c77dccb2d7a807a5674848a49f3c551ea7dbcb 100644
--- a/core/modules/aggregator/src/Tests/Migrate/d7/MigrateAggregatorSettingsTest.php
+++ b/core/modules/aggregator/src/Tests/Migrate/d7/MigrateAggregatorSettingsTest.php
@@ -24,7 +24,6 @@ class MigrateAggregatorSettingsTest extends MigrateDrupal7TestBase {
   protected function setUp() {
     parent::setUp();
     $this->installConfig(static::$modules);
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d7_aggregator_settings');
   }
 
diff --git a/core/modules/ban/src/Tests/Migrate/d7/MigrateBlockedIPsTest.php b/core/modules/ban/src/Tests/Migrate/d7/MigrateBlockedIPsTest.php
index 3efa4a9541d5874ba2f9aa3f8165139cc1f672d9..6a635fbcce576957ec53f11a22a06fac2529ec00 100644
--- a/core/modules/ban/src/Tests/Migrate/d7/MigrateBlockedIPsTest.php
+++ b/core/modules/ban/src/Tests/Migrate/d7/MigrateBlockedIPsTest.php
@@ -32,7 +32,6 @@ class MigrateBlockedIPsTest extends MigrateDrupal7TestBase {
   protected function setUp() {
     parent::setUp();
     $this->installSchema('ban', ['ban_ip']);
-    $this->loadDumps(['BlockedIps.php']);
     $this->executeMigration('d7_blocked_ips');
   }
 
diff --git a/core/modules/block/src/Tests/Migrate/d6/MigrateBlockTest.php b/core/modules/block/src/Tests/Migrate/d6/MigrateBlockTest.php
index 232fa4a321c5abc289b18564a29d999833c6ba8c..d1d3696ae5a1ec68f6bb4650a7f8f19101ec4b7c 100644
--- a/core/modules/block/src/Tests/Migrate/d6/MigrateBlockTest.php
+++ b/core/modules/block/src/Tests/Migrate/d6/MigrateBlockTest.php
@@ -71,7 +71,6 @@ protected function setUp() {
     // Install one of D8's test themes.
     \Drupal::service('theme_handler')->install(array('test_theme'));
 
-    $this->loadDumps(['Blocks.php', 'BlocksRoles.php', 'AggregatorFeed.php']);
     $this->executeMigration('d6_block');
   }
 
diff --git a/core/modules/block_content/src/Tests/Migrate/d6/MigrateBlockContentTest.php b/core/modules/block_content/src/Tests/Migrate/d6/MigrateBlockContentTest.php
index 3a6816105ba2e3df825a26f7d426094127f906a3..a4c5a571205e1dbe4fb448802df2303bb75ec59a 100644
--- a/core/modules/block_content/src/Tests/Migrate/d6/MigrateBlockContentTest.php
+++ b/core/modules/block_content/src/Tests/Migrate/d6/MigrateBlockContentTest.php
@@ -35,7 +35,6 @@ protected function setUp() {
         array(array(2), array('full_html'))
       )
     ));
-    $this->loadDumps(['Boxes.php']);
     $this->executeMigration('d6_custom_block');
   }
 
diff --git a/core/modules/book/src/Tests/Migrate/d6/MigrateBookConfigsTest.php b/core/modules/book/src/Tests/Migrate/d6/MigrateBookConfigsTest.php
index 9ae10305748dc1bde149d49786622d3a41b61099..9d7a229f81a358ce42f05699a590f80c72a9155c 100644
--- a/core/modules/book/src/Tests/Migrate/d6/MigrateBookConfigsTest.php
+++ b/core/modules/book/src/Tests/Migrate/d6/MigrateBookConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateBookConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_book_settings');
   }
 
diff --git a/core/modules/book/src/Tests/Migrate/d6/MigrateBookTest.php b/core/modules/book/src/Tests/Migrate/d6/MigrateBookTest.php
index ea7846e1b0a4ecf890d9ca50ee5f4d2c3268ca5a..b0ebebbc206ce95d6e5c7dc8a59971b52793a7aa 100644
--- a/core/modules/book/src/Tests/Migrate/d6/MigrateBookTest.php
+++ b/core/modules/book/src/Tests/Migrate/d6/MigrateBookTest.php
@@ -42,8 +42,6 @@ protected function setUp() {
       $id_mappings['d6_node'][] = array(array($i), array($i));
     }
     $this->prepareMigrations($id_mappings);
-    // Load database dumps to provide source data.
-    $this->loadDumps(['Book.php', 'MenuLinks.php']);
     $this->executeMigration('d6_book');
   }
 
diff --git a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTest.php b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTest.php
index 19e74fe8b3e09c5ee5727110a53e9ba723813b99..cd23f6ac2e4503da4abdd8d556364ff39f285bea 100644
--- a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTest.php
+++ b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTest.php
@@ -56,16 +56,6 @@ protected function setUp() {
       'd6_comment_entity_form_display' => array(array(array('story'), array('node', 'story', 'default', 'comment'))),
     );
     $this->prepareMigrations($id_mappings);
-
-    $this->loadDumps([
-      'Node.php',
-      'NodeRevisions.php',
-      'ContentTypeStory.php',
-      'ContentTypeTestPlanet.php',
-      'Variable.php',
-      'NodeType.php',
-      'Comments.php',
-    ]);
     $this->executeMigration('d6_comment');
   }
 
diff --git a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTypeTest.php b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTypeTest.php
index fd0b3f19dbb94df3e894fc2bb7bb14c92f2b507f..8d25d1cdec2930eab4c2ebe51c8c57b6df997bbe 100644
--- a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTypeTest.php
+++ b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTypeTest.php
@@ -24,12 +24,9 @@ class MigrateCommentTypeTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-
     $this->installEntitySchema('node');
     $this->installEntitySchema('comment');
     $this->installConfig(['node', 'comment']);
-
-    $this->loadDumps(['Variable.php', 'NodeType.php']);
     $this->executeMigration('d6_comment_type');
   }
 
diff --git a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableDisplayBase.php b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableDisplayBase.php
index d36dd0367f06c96589aef0ffa6d40cedef2747ca..0995df06a66239e25923a376556e513068b9ead2 100644
--- a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableDisplayBase.php
+++ b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableDisplayBase.php
@@ -64,7 +64,6 @@ protected function setUp() {
       ),
     );
     $this->prepareMigrations($id_mappings);
-    $this->loadDumps(['Variable.php', 'NodeType.php']);
     $this->executeMigration(static::MIGRATION);
 
   }
diff --git a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableEntityFormDisplaySubjectTest.php b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableEntityFormDisplaySubjectTest.php
index 6a7f27f3dad3b50a9a1cd564546c2c2747f955fe..9212f729255842853f68608b013a8f6eac8ae6bf 100644
--- a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableEntityFormDisplaySubjectTest.php
+++ b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableEntityFormDisplaySubjectTest.php
@@ -42,7 +42,6 @@ protected function setUp() {
       ),
     );
     $this->prepareMigrations($id_mappings);
-    $this->loadDumps(['Variable.php', 'NodeType.php']);
     $this->executeMigration('d6_comment_entity_form_display_subject');
   }
 
diff --git a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableFieldTest.php b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableFieldTest.php
index 3d55fb54af3c03d487b3b055273b8fb140267ea0..468c18db25ee1f258237583ee6c0483233587002 100644
--- a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableFieldTest.php
+++ b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableFieldTest.php
@@ -41,7 +41,6 @@ protected function setUp() {
       ),
     );
     $this->prepareMigrations($id_mappings);
-    $this->loadDumps(['Variable.php', 'NodeType.php']);
     $this->executeMigration('d6_comment_field');
   }
 
diff --git a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableInstanceTest.php b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableInstanceTest.php
index 45b09501b487673feb0d2207350531eb312c0058..1daf99f400610a98b0a6183b17dc1f32619a7743 100644
--- a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableInstanceTest.php
+++ b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentVariableInstanceTest.php
@@ -49,7 +49,6 @@ protected function setUp() {
       'type' => 'comment',
       'translatable' => '0',
     ))->save();
-    $this->loadDumps(['Variable.php', 'NodeType.php']);
     $this->executeMigration('d6_comment_field_instance');
   }
 
diff --git a/core/modules/contact/src/Tests/Migrate/d6/MigrateContactCategoryTest.php b/core/modules/contact/src/Tests/Migrate/d6/MigrateContactCategoryTest.php
index 459b515c13910f72d36eed2151792f899efe4d70..669ea7c07734d73f627325244a6cfc441a2dca30 100644
--- a/core/modules/contact/src/Tests/Migrate/d6/MigrateContactCategoryTest.php
+++ b/core/modules/contact/src/Tests/Migrate/d6/MigrateContactCategoryTest.php
@@ -29,7 +29,6 @@ class MigrateContactCategoryTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Contact.php']);
     $this->executeMigration('d6_contact_category');
   }
 
diff --git a/core/modules/contact/src/Tests/Migrate/d6/MigrateContactConfigsTest.php b/core/modules/contact/src/Tests/Migrate/d6/MigrateContactConfigsTest.php
index 99eb40560723fdf2294bfcc85937319db47a337a..9f9e673257934b931504f7d0ab941ac59c6a34fa 100644
--- a/core/modules/contact/src/Tests/Migrate/d6/MigrateContactConfigsTest.php
+++ b/core/modules/contact/src/Tests/Migrate/d6/MigrateContactConfigsTest.php
@@ -39,7 +39,6 @@ protected function setUp() {
       ),
     );
     $this->prepareMigrations($id_mappings);
-    $this->loadDumps(['Variable.php', 'Contact.php']);
     $this->executeMigration('d6_contact_settings');
   }
 
diff --git a/core/modules/dblog/src/Tests/Migrate/d6/MigrateDblogConfigsTest.php b/core/modules/dblog/src/Tests/Migrate/d6/MigrateDblogConfigsTest.php
index f3dcfa163661e81cc1f4a0c571a0954c2d090a5c..4fb4a763e534fb7a90eafb972f3db0d274750620 100644
--- a/core/modules/dblog/src/Tests/Migrate/d6/MigrateDblogConfigsTest.php
+++ b/core/modules/dblog/src/Tests/Migrate/d6/MigrateDblogConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateDblogConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_dblog_settings');
   }
 
diff --git a/core/modules/dblog/src/Tests/Migrate/d7/MigrateDblogConfigsTest.php b/core/modules/dblog/src/Tests/Migrate/d7/MigrateDblogConfigsTest.php
index 7d1f28a150041aa0630a018d444e5d6e94d1124e..6e088f25d614660b5b09665253575d9d006db251 100644
--- a/core/modules/dblog/src/Tests/Migrate/d7/MigrateDblogConfigsTest.php
+++ b/core/modules/dblog/src/Tests/Migrate/d7/MigrateDblogConfigsTest.php
@@ -29,7 +29,6 @@ class MigrateDblogConfigsTest extends MigrateDrupal7TestBase {
   protected function setUp() {
     parent::setUp();
     $this->installConfig(static::$modules);
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d7_dblog_settings');
   }
 
diff --git a/core/modules/field/src/Tests/Migrate/d6/MigrateFieldFormatterSettingsTest.php b/core/modules/field/src/Tests/Migrate/d6/MigrateFieldFormatterSettingsTest.php
index b556dcfb0ad10194e0f1c4ed1e451da463e93dbd..9198d06b1a2169375e666b617726087b6f2f4aa8 100644
--- a/core/modules/field/src/Tests/Migrate/d6/MigrateFieldFormatterSettingsTest.php
+++ b/core/modules/field/src/Tests/Migrate/d6/MigrateFieldFormatterSettingsTest.php
@@ -64,14 +64,6 @@ protected function setUp() {
       ),
     );
     $this->prepareMigrations($id_mappings);
-
-    $this->loadDumps([
-      'ContentNodeFieldInstance.php',
-      'ContentNodeField.php',
-      'ContentFieldTest.php',
-      'ContentFieldTestTwo.php',
-      'ContentFieldMultivalue.php',
-    ]);
     $this->executeMigration('d6_field_formatter_settings');
   }
 
diff --git a/core/modules/field/src/Tests/Migrate/d6/MigrateFieldInstanceTest.php b/core/modules/field/src/Tests/Migrate/d6/MigrateFieldInstanceTest.php
index ca21557c21deb18c81a787282fc61fa9a817045e..61bf944a6d750f62d3c282d4c9b9cf3be27a9ffd 100644
--- a/core/modules/field/src/Tests/Migrate/d6/MigrateFieldInstanceTest.php
+++ b/core/modules/field/src/Tests/Migrate/d6/MigrateFieldInstanceTest.php
@@ -66,13 +66,6 @@ protected function setUp() {
     entity_create('node_type', array('type' => 'story'))->save();
     entity_create('node_type', array('type' => 'test_page'))->save();
 
-    $this->loadDumps([
-      'ContentNodeFieldInstance.php',
-      'ContentNodeField.php',
-      'ContentFieldTest.php',
-      'ContentFieldTestTwo.php',
-      'ContentFieldMultivalue.php',
-    ]);
     $this->createFields();
     $this->executeMigration('d6_field_instance');
   }
diff --git a/core/modules/field/src/Tests/Migrate/d6/MigrateFieldTest.php b/core/modules/field/src/Tests/Migrate/d6/MigrateFieldTest.php
index 907bba56e7440597d7f5bb5802489c443c879d7f..30ce60a592840898bbd808c1b175a943adbf17c4 100644
--- a/core/modules/field/src/Tests/Migrate/d6/MigrateFieldTest.php
+++ b/core/modules/field/src/Tests/Migrate/d6/MigrateFieldTest.php
@@ -29,13 +29,6 @@ class MigrateFieldTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps([
-      'ContentNodeFieldInstance.php',
-      'ContentNodeField.php',
-      'ContentFieldTest.php',
-      'ContentFieldTestTwo.php',
-      'ContentFieldMultivalue.php',
-    ]);
     $this->executeMigration('d6_field');
   }
 
diff --git a/core/modules/field/src/Tests/Migrate/d6/MigrateFieldWidgetSettingsTest.php b/core/modules/field/src/Tests/Migrate/d6/MigrateFieldWidgetSettingsTest.php
index a3232c4e1f0657ea8409ea68ddd32fdfa296f619..37586a2dd0f8459486622913418d9343f9d2f319 100644
--- a/core/modules/field/src/Tests/Migrate/d6/MigrateFieldWidgetSettingsTest.php
+++ b/core/modules/field/src/Tests/Migrate/d6/MigrateFieldWidgetSettingsTest.php
@@ -61,13 +61,6 @@ protected function setUp() {
       ),
     );
     $this->prepareMigrations($id_mappings);
-    $this->loadDumps([
-      'ContentNodeFieldInstance.php',
-      'ContentNodeField.php',
-      'ContentFieldTest.php',
-      'ContentFieldTestTwo.php',
-      'ContentFieldMultivalue.php',
-    ]);
     $this->executeMigration('d6_field_instance_widget_settings');
   }
 
diff --git a/core/modules/file/src/Tests/Migrate/d6/MigrateFileConfigsTest.php b/core/modules/file/src/Tests/Migrate/d6/MigrateFileConfigsTest.php
index c7964e4f698aa14f1560ac265ee7284ffb23a7a7..c78c8b7d85b2d2cc6145017c4e91c3fba2c79040 100644
--- a/core/modules/file/src/Tests/Migrate/d6/MigrateFileConfigsTest.php
+++ b/core/modules/file/src/Tests/Migrate/d6/MigrateFileConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateFileConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_file_settings');
   }
 
diff --git a/core/modules/file/src/Tests/Migrate/d6/MigrateFileTest.php b/core/modules/file/src/Tests/Migrate/d6/MigrateFileTest.php
index c5b68fc315fda375cd58310d42e8f9f26461067c..2f68b2da0d2d3bee7c0c57d2b12e1345112b0fab 100644
--- a/core/modules/file/src/Tests/Migrate/d6/MigrateFileTest.php
+++ b/core/modules/file/src/Tests/Migrate/d6/MigrateFileTest.php
@@ -44,7 +44,6 @@ protected function setUp() {
     $this->installEntitySchema('file');
     $this->installConfig(['file']);
 
-    $this->loadDumps(['Files.php']);
     /** @var \Drupal\migrate\Entity\MigrationInterface $migration */
     $migration = entity_load('migration', 'd6_file');
     $source = $migration->get('source');
@@ -74,8 +73,6 @@ public function testFiles() {
     // Test that we can re-import and also test with file_directory_path set.
     db_truncate(entity_load('migration', 'd6_file')->getIdMap()->mapTableName())->execute();
 
-    $this->loadDumps(['Variable.php']);
-
     // Update the file_directory_path.
     Database::getConnection('default', 'migrate')
       ->update('variable')
diff --git a/core/modules/file/src/Tests/Migrate/d6/MigrateUploadBase.php b/core/modules/file/src/Tests/Migrate/d6/MigrateUploadBase.php
index 17ea473107392ec3c9a670e0fed2e03eb7585227..5cff822212efb14a5fbbd9b23655878c6a92b65e 100644
--- a/core/modules/file/src/Tests/Migrate/d6/MigrateUploadBase.php
+++ b/core/modules/file/src/Tests/Migrate/d6/MigrateUploadBase.php
@@ -94,13 +94,6 @@ protected function setUp() {
         $node->save();
       }
     }
-    $this->loadDumps([
-      'Node.php',
-      'NodeRevisions.php',
-      'ContentTypeStory.php',
-      'ContentTypeTestPlanet.php',
-      'Upload.php',
-    ]);
   }
 
 }
diff --git a/core/modules/file/src/Tests/Migrate/d6/MigrateUploadEntityDisplayTest.php b/core/modules/file/src/Tests/Migrate/d6/MigrateUploadEntityDisplayTest.php
index ff170a31562d87413e7a90265f971e6cc4f6e267..83eb0af04fd0b795d768bb67e8c840e64e8bbb6b 100644
--- a/core/modules/file/src/Tests/Migrate/d6/MigrateUploadEntityDisplayTest.php
+++ b/core/modules/file/src/Tests/Migrate/d6/MigrateUploadEntityDisplayTest.php
@@ -39,8 +39,6 @@ protected function setUp() {
       ),
     );
     $this->prepareMigrations($id_mappings);
-
-    $this->loadDumps(['NodeType.php', 'Variable.php']);
     $this->executeMigration('d6_upload_entity_display');
   }
 
diff --git a/core/modules/file/src/Tests/Migrate/d6/MigrateUploadEntityFormDisplayTest.php b/core/modules/file/src/Tests/Migrate/d6/MigrateUploadEntityFormDisplayTest.php
index b72f6456378d97465bad1e613d97de297ad780ba..6023f511e4de4c66717e8f057533f2d1fe818055 100644
--- a/core/modules/file/src/Tests/Migrate/d6/MigrateUploadEntityFormDisplayTest.php
+++ b/core/modules/file/src/Tests/Migrate/d6/MigrateUploadEntityFormDisplayTest.php
@@ -39,8 +39,6 @@ protected function setUp() {
       ),
     );
     $this->prepareMigrations($id_mappings);
-
-    $this->loadDumps(['NodeType.php', 'Variable.php']);
     $this->executeMigration('d6_upload_entity_form_display');
   }
 
diff --git a/core/modules/file/src/Tests/Migrate/d6/MigrateUploadInstanceTest.php b/core/modules/file/src/Tests/Migrate/d6/MigrateUploadInstanceTest.php
index 1a61af708732e694153d81fb447a11cabdbc48bd..998912a8c21894690ed82c311d1362968e5b6fdc 100644
--- a/core/modules/file/src/Tests/Migrate/d6/MigrateUploadInstanceTest.php
+++ b/core/modules/file/src/Tests/Migrate/d6/MigrateUploadInstanceTest.php
@@ -51,7 +51,6 @@ protected function setUp() {
       'translatable' => '0',
     ))->save();
 
-    $this->loadDumps(['NodeType.php', 'Variable.php']);
     $this->executeMigration('d6_upload_field_instance');
   }
 
diff --git a/core/modules/file/src/Tests/Migrate/d7/MigrateFileTest.php b/core/modules/file/src/Tests/Migrate/d7/MigrateFileTest.php
index 4dedfbb203a0a4a7d4a17be058e2b05bdbc24ce1..da1a6d251d5f87a343c8a88aa5fb44d0c53c8808 100644
--- a/core/modules/file/src/Tests/Migrate/d7/MigrateFileTest.php
+++ b/core/modules/file/src/Tests/Migrate/d7/MigrateFileTest.php
@@ -26,7 +26,6 @@ class MigrateFileTest extends MigrateDrupal7TestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->loadDumps(['FileManaged.php', 'Variable.php']);
     $this->installEntitySchema('file');
 
     $fs = \Drupal::service('file_system');
diff --git a/core/modules/filter/src/Tests/Migrate/d6/MigrateFilterFormatTest.php b/core/modules/filter/src/Tests/Migrate/d6/MigrateFilterFormatTest.php
index 62f374b6dfb586dbce224fc2fd323720f4a46cf9..ac5e1ce5524d6f4ece6b9fd3590ca468d206cfc8 100644
--- a/core/modules/filter/src/Tests/Migrate/d6/MigrateFilterFormatTest.php
+++ b/core/modules/filter/src/Tests/Migrate/d6/MigrateFilterFormatTest.php
@@ -26,7 +26,6 @@ class MigrateFilterFormatTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Filters.php', 'FilterFormats.php', 'Variable.php']);
     $this->executeMigration('d6_filter_format');
   }
 
diff --git a/core/modules/filter/src/Tests/Migrate/d7/MigrateFilterFormatTest.php b/core/modules/filter/src/Tests/Migrate/d7/MigrateFilterFormatTest.php
index ffb3ea57dd8f817ffed4de85dd62a0b2f469a8a7..ef4a5740487113120d07fcc650c0967a584d9b7c 100644
--- a/core/modules/filter/src/Tests/Migrate/d7/MigrateFilterFormatTest.php
+++ b/core/modules/filter/src/Tests/Migrate/d7/MigrateFilterFormatTest.php
@@ -28,7 +28,6 @@ class MigrateFilterFormatTest extends MigrateDrupal7TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Filter.php', 'FilterFormat.php', 'Variable.php']);
     $this->executeMigration('d7_filter_format');
   }
 
diff --git a/core/modules/forum/src/Tests/Migrate/d6/MigrateForumConfigsTest.php b/core/modules/forum/src/Tests/Migrate/d6/MigrateForumConfigsTest.php
index 803de4b07cea4fd4be3ce7a39dcf17dcf7c4c673..806253848d7f111cdbb406ec034e60636c0d13a6 100644
--- a/core/modules/forum/src/Tests/Migrate/d6/MigrateForumConfigsTest.php
+++ b/core/modules/forum/src/Tests/Migrate/d6/MigrateForumConfigsTest.php
@@ -36,7 +36,6 @@ protected function setUp() {
         array(array(1), array('vocabulary_1_i_0_')),
       )
     ));
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_forum_settings');
   }
 
diff --git a/core/modules/locale/src/Tests/Migrate/MigrateLocaleConfigsTest.php b/core/modules/locale/src/Tests/Migrate/MigrateLocaleConfigsTest.php
index ffa5277f12a560d22390680570ea0a0b68e50818..ceb34cde5e2f82a5dc52b50e5e253b21c75d3943 100644
--- a/core/modules/locale/src/Tests/Migrate/MigrateLocaleConfigsTest.php
+++ b/core/modules/locale/src/Tests/Migrate/MigrateLocaleConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateLocaleConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('locale_settings');
   }
 
diff --git a/core/modules/menu_link_content/src/Tests/Migrate/d6/MigrateMenuLinkTest.php b/core/modules/menu_link_content/src/Tests/Migrate/d6/MigrateMenuLinkTest.php
index cf21ebdfa9f91eb7c50d6b0ccf377c91d672f4e2..5fd0cbfc33dc0ed7a178a756d07ddeb296ff389f 100644
--- a/core/modules/menu_link_content/src/Tests/Migrate/d6/MigrateMenuLinkTest.php
+++ b/core/modules/menu_link_content/src/Tests/Migrate/d6/MigrateMenuLinkTest.php
@@ -42,7 +42,6 @@ protected function setUp() {
       ),
     ));
 
-    $this->loadDumps(['MenuLinks.php']);
     $this->executeMigration('d6_menu_links');
   }
 
diff --git a/core/modules/menu_ui/src/Tests/Migrate/MigrateMenuSettingsTest.php b/core/modules/menu_ui/src/Tests/Migrate/MigrateMenuSettingsTest.php
index 46de706a0bdb3e210a0eab4a3991b7981a4c145f..c1655c65f361b501fc43efaa58f4784d413a22a6 100644
--- a/core/modules/menu_ui/src/Tests/Migrate/MigrateMenuSettingsTest.php
+++ b/core/modules/menu_ui/src/Tests/Migrate/MigrateMenuSettingsTest.php
@@ -24,7 +24,6 @@ class MigrateMenuSettingsTest extends MigrateDrupal7TestBase {
   protected function setUp() {
     parent::setUp();
     $this->installConfig(['menu_ui']);
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('menu_settings');
   }
 
diff --git a/core/modules/migrate_drupal/src/Tests/MigrateDrupalTestBase.php b/core/modules/migrate_drupal/src/Tests/MigrateDrupalTestBase.php
index 9d4e1a2e13597c95e6bd9e459a4f57c7f36e1d08..f007b3112f75270eae45748b35f2795ab5a07448 100644
--- a/core/modules/migrate_drupal/src/Tests/MigrateDrupalTestBase.php
+++ b/core/modules/migrate_drupal/src/Tests/MigrateDrupalTestBase.php
@@ -30,7 +30,8 @@ abstract class MigrateDrupalTestBase extends MigrateTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['System.php']);
+    $tables = file_scan_directory($this->getDumpDirectory(), '/.php$/', array('recurse' => FALSE));
+    $this->loadDumps(array_keys($tables));
 
     $this->installEntitySchema('user');
     $this->installConfig(['migrate_drupal', 'system']);
@@ -46,14 +47,6 @@ protected function getDumpDirectory() {
     return __DIR__ . '/Table';
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  protected function loadDumps(array $files, $method = 'load') {
-    $files = array_map(function($file) { return $this->getDumpDirectory() . '/' . $file; }, $files);
-    parent::loadDumps($files, $method);
-  }
-
   /**
    * Turn all the migration templates for the specified drupal version into
    * real migration entities so we can test them.
diff --git a/core/modules/migrate_drupal/src/Tests/MigrateFullDrupalTestBase.php b/core/modules/migrate_drupal/src/Tests/MigrateFullDrupalTestBase.php
index 98289c0244fcadf626f24aa5450703f065cc416d..acbb24b1a723cc4d0b36130c26dca0cf9099c97d 100644
--- a/core/modules/migrate_drupal/src/Tests/MigrateFullDrupalTestBase.php
+++ b/core/modules/migrate_drupal/src/Tests/MigrateFullDrupalTestBase.php
@@ -28,14 +28,6 @@ abstract class MigrateFullDrupalTestBase extends MigrateDrupalTestBase {
    */
   protected static $blacklist = [];
 
-  /**
-   * Get the dump classes required for this migration test.
-   *
-   * @return array
-   *   The list of files containing dumps.
-   */
-  protected abstract function getDumps();
-
   /**
    * Get the test classes that needs to be run for this test.
    *
@@ -73,14 +65,10 @@ protected function tearDown() {
     parent::tearDown();
   }
 
-
   /**
    * Test the complete Drupal migration.
    */
   public function testDrupal() {
-    $dumps = $this->getDumps();
-    $this->loadDumps($dumps);
-
     $classes = $this->getTestClassesList();
     foreach ($classes as $class) {
       if (is_subclass_of($class, '\Drupal\migrate\Tests\MigrateDumpAlterInterface')) {
diff --git a/core/modules/migrate_drupal/src/Tests/d6/MigrateDrupal6Test.php b/core/modules/migrate_drupal/src/Tests/d6/MigrateDrupal6Test.php
index fb4f0ea13a6e8bc13ab8570972956149bdc3219e..9f3482ce734534361fa25e1525ae5d8ab8d23971 100644
--- a/core/modules/migrate_drupal/src/Tests/d6/MigrateDrupal6Test.php
+++ b/core/modules/migrate_drupal/src/Tests/d6/MigrateDrupal6Test.php
@@ -208,52 +208,6 @@ protected function setUp() {
     $this->installMigrations('Drupal 6');
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  protected function getDumps() {
-    return array(
-      'AggregatorFeed.php',
-      'AggregatorItem.php',
-      'Blocks.php',
-      'BlocksRoles.php',
-      'Book.php',
-      'Boxes.php',
-      'Comments.php',
-      'Contact.php',
-      'ContentFieldMultivalue.php',
-      'ContentFieldTest.php',
-      'ContentFieldTestTwo.php',
-      'ContentNodeField.php',
-      'ContentNodeFieldInstance.php',
-      'ContentTypeStory.php',
-      'ContentTypeTestPlanet.php',
-      'EventTimezones.php',
-      'Files.php',
-      'FilterFormats.php',
-      'Filters.php',
-      'MenuCustom.php',
-      'MenuLinks.php',
-      'Node.php',
-      'NodeRevisions.php',
-      'NodeType.php',
-      'Permission.php',
-      'ProfileFields.php',
-      'ProfileValues.php',
-      'Role.php',
-      'TermData.php',
-      'TermHierarchy.php',
-      'TermNode.php',
-      'Upload.php',
-      'UrlAlias.php',
-      'Users.php',
-      'UsersRoles.php',
-      'Variable.php',
-      'Vocabulary.php',
-      'VocabularyNodeTypes.php',
-    );
-  }
-
   /**
    * Returns the path to the dump directory.
    *
diff --git a/core/modules/migrate_drupal/src/Tests/dependencies/MigrateDependenciesTest.php b/core/modules/migrate_drupal/src/Tests/dependencies/MigrateDependenciesTest.php
index 81842c15057104a6996213fda6f451fa07e9ac08..d4b3a53bfb32b4390ff523e9d3a881d0b0cac8af 100644
--- a/core/modules/migrate_drupal/src/Tests/dependencies/MigrateDependenciesTest.php
+++ b/core/modules/migrate_drupal/src/Tests/dependencies/MigrateDependenciesTest.php
@@ -55,7 +55,6 @@ public function testMigrateDependenciesOrder() {
   public function testAggregatorMigrateDependencies() {
     /** @var \Drupal\migrate\entity\Migration $migration */
     $migration = entity_load('migration', 'd6_aggregator_item');
-    $this->loadDumps(['AggregatorItem.php']);
     $executable = new MigrateExecutable($migration, $this);
     $this->startCollectingMessages();
     $executable->import();
diff --git a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeBuilderTest.php b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeBuilderTest.php
index 33625ebd90a3f5d60cbf6ff01803891d1e405a1c..d19061b79dd399477d0be9e497e4b9dda07adbc1 100644
--- a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeBuilderTest.php
+++ b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeBuilderTest.php
@@ -16,18 +16,6 @@ class MigrateNodeBuilderTest extends MigrateDrupal6TestBase {
 
   public static $modules = ['migrate', 'migrate_drupal', 'node'];
 
-  /**
-   * {@inheritdoc}
-   */
-  public function setUp() {
-    parent::setUp();
-    $this->loadDumps([
-      'ContentNodeField.php',
-      'ContentNodeFieldInstance.php',
-      'NodeType.php',
-    ]);
-  }
-
   /**
    * Tests creating migrations from a template, using a builder plugin.
    */
diff --git a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeBundleSettingsTest.php b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeBundleSettingsTest.php
index fc6e4e54b2896bc801dccc36f4ee98e29f1c92b7..454040d8a32df81db11f931785d17bf8b0d28c17 100644
--- a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeBundleSettingsTest.php
+++ b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeBundleSettingsTest.php
@@ -57,7 +57,6 @@ public function setUp() {
     );
     $this->prepareMigrations($id_mappings);
 
-    $this->loadDumps(['NodeType.php', 'Variable.php']);
     $this->executeMigration('d6_node_setting_promote');
     $this->executeMigration('d6_node_setting_status');
     $this->executeMigration('d6_node_setting_sticky');
diff --git a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeConfigsTest.php b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeConfigsTest.php
index 291c42a319207930bd696b6e17199119fbefb6df..af540f768c159b61cd3a11169bf28b8c55a02ac9 100644
--- a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeConfigsTest.php
+++ b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateNodeConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_node_settings');
   }
 
diff --git a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeRevisionTest.php b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeRevisionTest.php
index b10083e68fdbbec0338e8d691e29fe68638c2ba6..27a5dcd307f24510e3fa13b6d82557388afad1f2 100644
--- a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeRevisionTest.php
+++ b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeRevisionTest.php
@@ -29,8 +29,6 @@ protected function setUp() {
     );
     $this->prepareMigrations($id_mappings);
 
-    $this->loadDumps(['Users.php']);
-
     // Create our users for the node authors.
     $query = Database::getConnection('default', 'migrate')->query('SELECT * FROM {users} WHERE uid NOT IN (0, 1)');
     while(($row = $query->fetchAssoc()) !== FALSE) {
diff --git a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTestBase.php b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTestBase.php
index f011a907265784cb9bbab75df8cee07caece4098..a47df1f3aa996b74c1f63af4dff7779f0de4191a 100644
--- a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTestBase.php
+++ b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTestBase.php
@@ -94,20 +94,6 @@ protected function setUp() {
     ));
     $node->enforceIsNew();
     $node->save();
-
-    $this->loadDumps([
-      'Node.php',
-      'NodeRevisions.php',
-      'ContentTypeStory.php',
-      'ContentTypeTestPlanet.php',
-      'NodeType.php',
-      'Variable.php',
-      'ContentNodeFieldInstance.php',
-      'ContentNodeField.php',
-      'ContentFieldTest.php',
-      'ContentFieldTestTwo.php',
-      'ContentFieldMultivalue.php',
-    ]);
   }
 
 }
diff --git a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTypeTest.php b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTypeTest.php
index 1ef267dd9c1cd90ab5161054f704451e31b066c0..f7c5832d796d3afd3efdde0948dd5314f8fc348e 100644
--- a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTypeTest.php
+++ b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTypeTest.php
@@ -30,9 +30,7 @@ class MigrateNodeTypeTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-
     $this->installConfig(array('node'));
-    $this->loadDumps(['NodeType.php', 'Variable.php']);
     $this->executeMigration('d6_node_type');
   }
 
diff --git a/core/modules/node/src/Tests/Migrate/d6/MigrateViewModesTest.php b/core/modules/node/src/Tests/Migrate/d6/MigrateViewModesTest.php
index aa4337f0aa95b4b0124aed500ff97068c1a3b583..310a0c9e78445b2a3eb905cc26b78a21fc17a105 100644
--- a/core/modules/node/src/Tests/Migrate/d6/MigrateViewModesTest.php
+++ b/core/modules/node/src/Tests/Migrate/d6/MigrateViewModesTest.php
@@ -29,13 +29,6 @@ class MigrateViewModesTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps([
-      'ContentNodeFieldInstance.php',
-      'ContentNodeField.php',
-      'ContentFieldTest.php',
-      'ContentFieldTestTwo.php',
-      'ContentFieldMultivalue.php',
-    ]);
     $this->executeMigration('d6_view_modes');
   }
 
diff --git a/core/modules/path/src/Tests/Migrate/d6/MigrateUrlAliasTest.php b/core/modules/path/src/Tests/Migrate/d6/MigrateUrlAliasTest.php
index 200019c9d46d70cf1d070619ca71d6da387f1d25..bf08192ce48ace2d115236cdea9e1615329b5254 100644
--- a/core/modules/path/src/Tests/Migrate/d6/MigrateUrlAliasTest.php
+++ b/core/modules/path/src/Tests/Migrate/d6/MigrateUrlAliasTest.php
@@ -31,9 +31,7 @@ class MigrateUrlAliasTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-
     $this->installSchema('system', ['url_alias']);
-    $this->loadDumps(['UrlAlias.php']);
     $this->executeMigration('d6_url_alias');
   }
 
diff --git a/core/modules/search/src/Tests/Migrate/d6/MigrateSearchPageTest.php b/core/modules/search/src/Tests/Migrate/d6/MigrateSearchPageTest.php
index 81fc6e1d77dedcd14986093adb1c3a7a0f7f7872..c330d2f4df5f50eb4ac47399eb23d8d1e187cc69 100644
--- a/core/modules/search/src/Tests/Migrate/d6/MigrateSearchPageTest.php
+++ b/core/modules/search/src/Tests/Migrate/d6/MigrateSearchPageTest.php
@@ -30,7 +30,6 @@ class MigrateSearchPageTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_search_page');
   }
 
diff --git a/core/modules/search/src/Tests/Migrate/d6/MigrateSearchSettingsTest.php b/core/modules/search/src/Tests/Migrate/d6/MigrateSearchSettingsTest.php
index 6b08fe530fd64d41b9a38ce233707fb6bbaffa98..d872d160e661ef3a93b4b34f68f98bc430e42fbc 100644
--- a/core/modules/search/src/Tests/Migrate/d6/MigrateSearchSettingsTest.php
+++ b/core/modules/search/src/Tests/Migrate/d6/MigrateSearchSettingsTest.php
@@ -31,7 +31,6 @@ class MigrateSearchSettingsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_search_settings');
   }
 
diff --git a/core/modules/search/src/Tests/Migrate/d7/MigrateSearchSettingsTest.php b/core/modules/search/src/Tests/Migrate/d7/MigrateSearchSettingsTest.php
index dc31d153e793ba09cf008200b1b1415d39b588a0..5adff4108a702def96b830ba8ec0e1bedb185062 100644
--- a/core/modules/search/src/Tests/Migrate/d7/MigrateSearchSettingsTest.php
+++ b/core/modules/search/src/Tests/Migrate/d7/MigrateSearchSettingsTest.php
@@ -23,7 +23,6 @@ class MigrateSearchSettingsTest extends MigrateDrupal7TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d7_search_settings');
   }
 
diff --git a/core/modules/simpletest/src/Tests/Migrate/d6/MigrateSimpletestConfigsTest.php b/core/modules/simpletest/src/Tests/Migrate/d6/MigrateSimpletestConfigsTest.php
index c44578d7ed27f533dc616f47643b19c9373fbd8f..43344dc0275ff29d3ed013bcecfa250ca0b86533 100644
--- a/core/modules/simpletest/src/Tests/Migrate/d6/MigrateSimpletestConfigsTest.php
+++ b/core/modules/simpletest/src/Tests/Migrate/d6/MigrateSimpletestConfigsTest.php
@@ -33,7 +33,6 @@ protected function setUp() {
     parent::setUp();
 
     $this->installConfig(['simpletest']);
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_simpletest_settings');
   }
 
diff --git a/core/modules/simpletest/src/Tests/Migrate/d7/MigrateSimpletestSettingsTest.php b/core/modules/simpletest/src/Tests/Migrate/d7/MigrateSimpletestSettingsTest.php
index 121c86c813f1d5a3688ad9ab829fb02f6dfde64d..0528cc17659e53e1e630238408dfe13c8415c48f 100644
--- a/core/modules/simpletest/src/Tests/Migrate/d7/MigrateSimpletestSettingsTest.php
+++ b/core/modules/simpletest/src/Tests/Migrate/d7/MigrateSimpletestSettingsTest.php
@@ -24,7 +24,6 @@ class MigrateSimpletestSettingsTest extends MigrateDrupal7TestBase {
   protected function setUp() {
     parent::setUp();
     $this->installConfig(static::$modules);
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d7_simpletest_settings');
   }
 
diff --git a/core/modules/statistics/src/Tests/Migrate/d6/MigrateStatisticsConfigsTest.php b/core/modules/statistics/src/Tests/Migrate/d6/MigrateStatisticsConfigsTest.php
index ea0be9d4689e4da8eec31f7768f102db6e97897a..9a0a9d2ce29a1794e17ac69e3143be284b864382 100644
--- a/core/modules/statistics/src/Tests/Migrate/d6/MigrateStatisticsConfigsTest.php
+++ b/core/modules/statistics/src/Tests/Migrate/d6/MigrateStatisticsConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateStatisticsConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_statistics_settings');
   }
 
diff --git a/core/modules/syslog/src/Tests/Migrate/d6/MigrateSyslogConfigsTest.php b/core/modules/syslog/src/Tests/Migrate/d6/MigrateSyslogConfigsTest.php
index 19d9505d7458acc6b34b5b94f72fd782098adda3..0ed8593613d4d924ad76c91ad55fd256e7ff2416 100644
--- a/core/modules/syslog/src/Tests/Migrate/d6/MigrateSyslogConfigsTest.php
+++ b/core/modules/syslog/src/Tests/Migrate/d6/MigrateSyslogConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateSyslogConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_syslog_settings');
   }
 
diff --git a/core/modules/syslog/src/Tests/Migrate/d7/MigrateSyslogConfigsTest.php b/core/modules/syslog/src/Tests/Migrate/d7/MigrateSyslogConfigsTest.php
index 234a52f919e34b81b9c0a26fe00d043d8a03c43f..f7ae20567c1b701200ee8626c188c5a533113548 100644
--- a/core/modules/syslog/src/Tests/Migrate/d7/MigrateSyslogConfigsTest.php
+++ b/core/modules/syslog/src/Tests/Migrate/d7/MigrateSyslogConfigsTest.php
@@ -32,7 +32,6 @@ class MigrateSyslogConfigsTest extends MigrateDrupal7TestBase {
   protected function setUp() {
     parent::setUp();
     $this->installConfig(static::$modules);
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d7_syslog_settings');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateDateFormatTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateDateFormatTest.php
index c1d5c8f8795546585cd61d49f6d5ff69b519bfd8..8ba6c95fd359051bdb4169960c22b263129bc9de 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateDateFormatTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateDateFormatTest.php
@@ -23,7 +23,6 @@ class MigrateDateFormatTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_date_formats');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateMenuTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateMenuTest.php
index 279e2b7f506be303535532482511e2859d747247..b868f2a28972a14c345a6bbf0b97d8de41afae2f 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateMenuTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateMenuTest.php
@@ -24,7 +24,6 @@ class MigrateMenuTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['MenuCustom.php']);
     $this->executeMigration('d6_menu');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemCronTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemCronTest.php
index c39f11e1eceaff9030a14171afcd35e3fa8fe9a0..77831b0349badea803df54ea67dec6bf511058cd 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemCronTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemCronTest.php
@@ -21,7 +21,6 @@ class MigrateSystemCronTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_system_cron');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemFileTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemFileTest.php
index 9a9ff2a5699e5526d61c3c7e782d16ff9b43ea83..6b7e0c2f956ec6a0f3c6c8b87c73e16de0084d14 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemFileTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemFileTest.php
@@ -21,7 +21,6 @@ class MigrateSystemFileTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_system_file');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemImageGdTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemImageGdTest.php
index cdf9eaee0be043ff3a258813e516ccb4b934ca4c..57f30a49bae89367d4e72f43d991613ca041168b 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemImageGdTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemImageGdTest.php
@@ -21,7 +21,6 @@ class MigrateSystemImageGdTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_system_image_gd');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemImageTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemImageTest.php
index e91e7cbc7cdc315ed72b8c6dec81ff3c6872a9c5..a2e5d80e58dfaab991ad1b7e2243c2b1ff495c6e 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemImageTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemImageTest.php
@@ -21,7 +21,6 @@ class MigrateSystemImageTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_system_image');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemLoggingTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemLoggingTest.php
index 963f58bb00089167f721f52b0a337269ed3801b1..c3529100e32d7299f0f1733fde410a392e6e9e61 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemLoggingTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemLoggingTest.php
@@ -24,7 +24,6 @@ class MigrateSystemLoggingTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_system_logging');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemMaintenanceTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemMaintenanceTest.php
index 581be5e59fd87eb61195b9ee4a6a51a8919bfcc8..82ea4831cfa826a523f1426d57cbad5a33d7f785 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemMaintenanceTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemMaintenanceTest.php
@@ -21,7 +21,6 @@ class MigrateSystemMaintenanceTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_system_maintenance');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemPerformanceTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemPerformanceTest.php
index 54e72fa77adcb0f2aae3631c37bf4d1ea7329a4f..f6defe941bc29842f8eb01d6ad2a402a1d19f013 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemPerformanceTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemPerformanceTest.php
@@ -21,7 +21,6 @@ class MigrateSystemPerformanceTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_system_performance');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemRssTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemRssTest.php
index 6295a56987857e53ccf780ea7a6141e393f72516..21b04c2bf7e5b5eec42385777836e9f0b38dc4c3 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemRssTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemRssTest.php
@@ -21,7 +21,6 @@ class MigrateSystemRssTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_system_rss');
   }
 
diff --git a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemSiteTest.php b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemSiteTest.php
index 75910631fcb58396ab57f37f9d6598515cb21712..2b68764d91b5f5c24f029024fd7a37a576fd7fde 100644
--- a/core/modules/system/src/Tests/Migrate/d6/MigrateSystemSiteTest.php
+++ b/core/modules/system/src/Tests/Migrate/d6/MigrateSystemSiteTest.php
@@ -21,7 +21,6 @@ class MigrateSystemSiteTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_system_site');
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyConfigsTest.php b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyConfigsTest.php
index 08b12a9ae3bad93f40826bf6c90e663f2216e0f9..ef17ea6e3eeba899b036434fa53fc5842d8513e6 100644
--- a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyConfigsTest.php
+++ b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateTaxonomyConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_taxonomy_settings');
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyTermTest.php b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyTermTest.php
index 8cf75609c87689edc8aedb9f9f587e46f25bf066..eefcceb9c68cfc542f4af8486e492b80f1400fed 100644
--- a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyTermTest.php
+++ b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyTermTest.php
@@ -33,12 +33,6 @@ protected function setUp() {
         array(array(2), array('vocabulary_2_i_1_')),
         array(array(3), array('vocabulary_3_i_2_')),
     )));
-    $this->loadDumps([
-      'TermData.php',
-      'TermHierarchy.php',
-      'Vocabulary.php',
-      'VocabularyNodeTypes.php',
-    ]);
     $this->executeMigration('d6_taxonomy_term');
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyVocabularyTest.php b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyVocabularyTest.php
index e19923815efc15e4d7bb9e19eab6beac3bd01064..af2fdbaf95b0585e8fadfd7d7658eda3ccd56146 100644
--- a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyVocabularyTest.php
+++ b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyVocabularyTest.php
@@ -29,7 +29,6 @@ class MigrateTaxonomyVocabularyTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Vocabulary.php', 'VocabularyNodeTypes.php']);
     $this->executeMigration('d6_taxonomy_vocabulary');
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTermNodeTestBase.php b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTermNodeTestBase.php
index c54377b2596ddf3bbdf589da84192eec7ab1d91c..0d51f6456718b0211676258dcc76d7e9fc3bc59b 100644
--- a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTermNodeTestBase.php
+++ b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTermNodeTestBase.php
@@ -82,17 +82,6 @@ protected function setUp() {
         $node->save();
       }
     }
-    $this->loadDumps([
-      'Node.php',
-      'NodeRevisions.php',
-      'ContentTypeStory.php',
-      'ContentTypeTestPlanet.php',
-      'TermNode.php',
-      'TermHierarchy.php',
-      'TermData.php',
-      'Vocabulary.php',
-      'VocabularyNodeTypes.php',
-    ]);
   }
 
 }
diff --git a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyEntityDisplayTest.php b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyEntityDisplayTest.php
index 5c266e6b0590ea7e69d7026ee5c4b8d4e20562c1..bcf6b69865a9bb83d10882d2af54cf5023227110 100644
--- a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyEntityDisplayTest.php
+++ b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyEntityDisplayTest.php
@@ -69,8 +69,6 @@ protected function setUp() {
       )
     );
     $this->prepareMigrations($id_mappings);
-
-    $this->loadDumps(['Vocabulary.php', 'VocabularyNodeTypes.php']);
     $this->executeMigration('d6_vocabulary_entity_display');
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyEntityFormDisplayTest.php b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyEntityFormDisplayTest.php
index 169143800689b7715b8c19915d3febab61e2788c..80efa090c451db064b1b74652a8699c851879ce5 100644
--- a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyEntityFormDisplayTest.php
+++ b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyEntityFormDisplayTest.php
@@ -69,8 +69,6 @@ protected function setUp() {
       )
     );
     $this->prepareMigrations($id_mappings);
-
-    $this->loadDumps(['Vocabulary.php', 'VocabularyNodeTypes.php']);
     $this->executeMigration('d6_vocabulary_entity_form_display');
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyFieldInstanceTest.php b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyFieldInstanceTest.php
index 0154063f05675e3b59e67b2346571f7fe3556740..f5c02ad5409081a8c237ae195509bc4c75916e72 100644
--- a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyFieldInstanceTest.php
+++ b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyFieldInstanceTest.php
@@ -68,7 +68,6 @@ protected function setUp() {
       ),
     ))->save();
 
-    $this->loadDumps(['Vocabulary.php', 'VocabularyNodeTypes.php']);
     $this->executeMigration('d6_vocabulary_field_instance');
   }
 
diff --git a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyFieldTest.php b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyFieldTest.php
index 9859d59911c5950409eb08428c18d4444fa15f87..0c588c894c0dd3c80068a2d9137a5bbf34149714 100644
--- a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyFieldTest.php
+++ b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateVocabularyFieldTest.php
@@ -44,7 +44,6 @@ protected function setUp() {
       'vid' => 'test_vocab',
     ))->save();
 
-    $this->loadDumps(['Vocabulary.php', 'VocabularyNodeTypes.php']);
     $this->executeMigration('d6_vocabulary_field');
   }
 
diff --git a/core/modules/text/src/Tests/Migrate/d6/MigrateTextConfigsTest.php b/core/modules/text/src/Tests/Migrate/d6/MigrateTextConfigsTest.php
index 929d72dde2b236ee47f795ada6613a4877ac94cf..440ffc018b08b5aa9ed6e1a769870d4ac124bb3d 100644
--- a/core/modules/text/src/Tests/Migrate/d6/MigrateTextConfigsTest.php
+++ b/core/modules/text/src/Tests/Migrate/d6/MigrateTextConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateTextConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_text_settings');
   }
 
diff --git a/core/modules/tracker/src/Tests/Migrate/d7/MigrateTrackerSettingsTest.php b/core/modules/tracker/src/Tests/Migrate/d7/MigrateTrackerSettingsTest.php
index 3dd67b3831d763eea9e7c8578aca1b9b75853ada..f37871ef078e8df3028bfe5bc0c174bfd412b5c9 100644
--- a/core/modules/tracker/src/Tests/Migrate/d7/MigrateTrackerSettingsTest.php
+++ b/core/modules/tracker/src/Tests/Migrate/d7/MigrateTrackerSettingsTest.php
@@ -24,7 +24,6 @@ class MigrateTrackerSettingsTest extends MigrateDrupal7TestBase {
   protected function setUp() {
     parent::setUp();
     $this->installConfig(['tracker']);
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d7_tracker_settings');
   }
 
diff --git a/core/modules/update/src/Tests/Migrate/d6/MigrateUpdateConfigsTest.php b/core/modules/update/src/Tests/Migrate/d6/MigrateUpdateConfigsTest.php
index 9cea4fc5018c5643551d6aa98a6f9c8f72dee59c..fedf1829c6f4fefd472327926fc26ba78c765876 100644
--- a/core/modules/update/src/Tests/Migrate/d6/MigrateUpdateConfigsTest.php
+++ b/core/modules/update/src/Tests/Migrate/d6/MigrateUpdateConfigsTest.php
@@ -31,7 +31,6 @@ class MigrateUpdateConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_update_settings');
   }
 
diff --git a/core/modules/user/src/Tests/Migrate/ProfileValuesBuilderTest.php b/core/modules/user/src/Tests/Migrate/ProfileValuesBuilderTest.php
index a7f152ded7f1ef29aa6df990c963710265915d99..747edc9025d6d424148a233a0fc4c7aa30775cf2 100644
--- a/core/modules/user/src/Tests/Migrate/ProfileValuesBuilderTest.php
+++ b/core/modules/user/src/Tests/Migrate/ProfileValuesBuilderTest.php
@@ -16,14 +16,6 @@ class ProfileValuesBuilderTest extends MigrateDrupal6TestBase {
 
   public static $modules = ['migrate', 'migrate_drupal', 'user'];
 
-  /**
-   * {@inheritdoc}
-   */
-  protected function setUp() {
-    parent::setUp();
-    $this->loadDumps(['ProfileFields.php', 'ProfileValues.php']);
-  }
-
   /**
    * Tests that profile fields are merged into the d6_profile_values migration's
    * process pipeline by the d6_profile_values builder.
diff --git a/core/modules/user/src/Tests/Migrate/d6/MigrateUserConfigsTest.php b/core/modules/user/src/Tests/Migrate/d6/MigrateUserConfigsTest.php
index 9fa2babf116801db10ef8f6f71744c9a6b309bc1..a087bbd137b14150279b16d387a03b2f66271837 100644
--- a/core/modules/user/src/Tests/Migrate/d6/MigrateUserConfigsTest.php
+++ b/core/modules/user/src/Tests/Migrate/d6/MigrateUserConfigsTest.php
@@ -24,7 +24,6 @@ class MigrateUserConfigsTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps(['Variable.php']);
     $this->executeMigration('d6_user_mail');
     $this->executeMigration('d6_user_settings');
   }
diff --git a/core/modules/user/src/Tests/Migrate/d6/MigrateUserContactSettingsTest.php b/core/modules/user/src/Tests/Migrate/d6/MigrateUserContactSettingsTest.php
index 33637af578289df2af82bc9381d8ee447a779814..dec01537f5133961f099ab601206f5edbc0e8419 100644
--- a/core/modules/user/src/Tests/Migrate/d6/MigrateUserContactSettingsTest.php
+++ b/core/modules/user/src/Tests/Migrate/d6/MigrateUserContactSettingsTest.php
@@ -29,13 +29,6 @@ protected function setUp() {
 
     $this->installSchema('user', array('users_data'));
 
-    $this->loadDumps([
-      'Users.php',
-      'ProfileValues.php',
-      'UsersRoles.php',
-      'EventTimezones.php',
-    ]);
-
     $id_mappings = array(
       'd6_user' => array(
         array(array(2), array(2)),
diff --git a/core/modules/user/src/Tests/Migrate/d6/MigrateUserPictureFileTest.php b/core/modules/user/src/Tests/Migrate/d6/MigrateUserPictureFileTest.php
index 650e6f2ec4d416cb64a733c27aba0da15d9199af..54a84566603b6e022c8454efe84c589113c0a564 100644
--- a/core/modules/user/src/Tests/Migrate/d6/MigrateUserPictureFileTest.php
+++ b/core/modules/user/src/Tests/Migrate/d6/MigrateUserPictureFileTest.php
@@ -31,12 +31,6 @@ protected function setUp() {
     parent::setUp();
 
     $this->installEntitySchema('file');
-    $this->loadDumps([
-      'Users.php',
-      'ProfileValues.php',
-      'UsersRoles.php',
-      'EventTimezones.php',
-    ]);
 
     /** @var \Drupal\migrate\Entity\MigrationInterface $migration */
     $migration = entity_load('migration', 'd6_user_picture_file');
diff --git a/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileEntityDisplayTest.php b/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileEntityDisplayTest.php
index a1e9d165c84ca764597515f598a978143ea305f4..059230f9a1c3ae367eec7a4c51ca5ac53bfddd46 100644
--- a/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileEntityDisplayTest.php
+++ b/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileEntityDisplayTest.php
@@ -73,14 +73,6 @@ protected function setUp() {
       'type' => 'boolean',
     ))->save();
 
-    $this->loadDumps([
-      'ProfileFields.php',
-      'Users.php',
-      'ProfileValues.php',
-      'UsersRoles.php',
-      'EventTimezones.php',
-    ]);
-
     $field_data = Database::getConnection('default', 'migrate')
       ->select('profile_fields', 'u')
       ->fields('u')
diff --git a/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileEntityFormDisplayTest.php b/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileEntityFormDisplayTest.php
index a863abef56d47b616208f9917623206f0684a6ba..0adb0619b2da17bded337e99b6b6b433c66cdee4 100644
--- a/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileEntityFormDisplayTest.php
+++ b/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileEntityFormDisplayTest.php
@@ -68,14 +68,6 @@ protected function setUp() {
       'type' => 'boolean',
     ))->save();
 
-    $this->loadDumps([
-      'ProfileFields.php',
-      'Users.php',
-      'ProfileValues.php',
-      'UsersRoles.php',
-      'EventTimezones.php',
-    ]);
-
     $field_data = Database::getConnection('default', 'migrate')
       ->select('profile_fields', 'u')
       ->fields('u')
diff --git a/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileFieldInstanceTest.php b/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileFieldInstanceTest.php
index 2b775ed4be5898ab576f299bac2bdd8284cdf16f..e4bbee16a029adcdf93ed9bdc43c785a1d65aa67 100644
--- a/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileFieldInstanceTest.php
+++ b/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileFieldInstanceTest.php
@@ -32,13 +32,6 @@ protected function setUp() {
     );
     $this->prepareMigrations($id_mappings);
     $this->createFields();
-    $this->loadDumps(array(
-      'ProfileFields.php',
-      'Users.php',
-      'ProfileValues.php',
-      'UsersRoles.php',
-      'EventTimezones.php',
-    ));
     $this->executeMigration('d6_user_profile_field_instance');
   }
 
diff --git a/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileFieldTest.php b/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileFieldTest.php
index fd739ae16c76c46e0610ca0c3e0b3bcb50fe74e9..12bb0a2a091ad8b576c57e3f40141a389773a133 100644
--- a/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileFieldTest.php
+++ b/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileFieldTest.php
@@ -24,13 +24,6 @@ class MigrateUserProfileFieldTest extends MigrateDrupal6TestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->loadDumps([
-      'ProfileFields.php',
-      'Users.php',
-      'ProfileValues.php',
-      'UsersRoles.php',
-      'EventTimezones.php',
-    ]);
     $this->executeMigration('d6_user_profile_field');
   }
 
diff --git a/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileValuesTest.php b/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileValuesTest.php
index 303013fb6ae029ff9f5cf41b5fa4c512660ecfe6..f07b919fa25dcd9607fb5b6bbf427b01918b84d9 100644
--- a/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileValuesTest.php
+++ b/core/modules/user/src/Tests/Migrate/d6/MigrateUserProfileValuesTest.php
@@ -105,14 +105,6 @@ protected function setUp() {
     );
     $this->prepareMigrations($id_mappings);
 
-    $this->loadDumps([
-      'ProfileFields.php',
-      'Users.php',
-      'ProfileValues.php',
-      'UsersRoles.php',
-      'EventTimezones.php',
-    ]);
-
     $field_data = Database::getConnection('default', 'migrate')
       ->select('profile_fields', 'u')
       ->fields('u')
diff --git a/core/modules/user/src/Tests/Migrate/d6/MigrateUserRoleTest.php b/core/modules/user/src/Tests/Migrate/d6/MigrateUserRoleTest.php
index 1d637e72fdf05af49620eb298f6e8ff2fe0c02ba..caf1ca9e4a1f7aa716cc83373dc70144cac24844 100644
--- a/core/modules/user/src/Tests/Migrate/d6/MigrateUserRoleTest.php
+++ b/core/modules/user/src/Tests/Migrate/d6/MigrateUserRoleTest.php
@@ -37,14 +37,6 @@ protected function setUp() {
       ),
     );
     $this->prepareMigrations($id_mappings);
-
-    $this->loadDumps([
-      'Permission.php',
-      'Role.php',
-      'Filters.php',
-      'FilterFormats.php',
-      'Variable.php',
-    ]);
     $this->executeMigration('d6_user_role');
   }
 
diff --git a/core/modules/user/src/Tests/Migrate/d6/MigrateUserTest.php b/core/modules/user/src/Tests/Migrate/d6/MigrateUserTest.php
index dcc387c9b0018478e84e5f697b3d89787f7e7570..7fa3236877a881f15fcb95af13e10a269ec7a9b0 100644
--- a/core/modules/user/src/Tests/Migrate/d6/MigrateUserTest.php
+++ b/core/modules/user/src/Tests/Migrate/d6/MigrateUserTest.php
@@ -87,19 +87,6 @@ protected function setUp() {
     file_put_contents($file->getFileUri(), file_get_contents('core/modules/simpletest/files/image-2.jpg'));
     $file->save();
 
-    $this->loadDumps([
-      'Filters.php',
-      'FilterFormats.php',
-      'Variable.php',
-      'ProfileFields.php',
-      'Permission.php',
-      'Role.php',
-      'Users.php',
-      'ProfileValues.php',
-      'UsersRoles.php',
-      'EventTimezones.php',
-    ]);
-
     $id_mappings = array(
       'd6_user_role' => array(
         array(array(1), array('anonymous user')),