diff --git a/core/modules/field/migration_templates/d7_field_instance.yml b/core/modules/field/migration_templates/d7_field_instance.yml
index da4ce0a458a01b81f45d6a85ca22f9eca96cb184..6f9d0742603a440c2b8682ec9727b061c56f75e0 100644
--- a/core/modules/field/migration_templates/d7_field_instance.yml
+++ b/core/modules/field/migration_templates/d7_field_instance.yml
@@ -36,4 +36,3 @@ migration_dependencies:
   optional:
     - d7_node_type
     - d7_comment_type
-    - d7_taxonomy_vocabulary
diff --git a/core/modules/migrate/src/Plugin/migrate/process/Iterator.php b/core/modules/migrate/src/Plugin/migrate/process/Iterator.php
index 2a41c4a9a8abab53bd382488f930fe8e0c1f31e4..70df9baa4f5124b2039dbfcdf9ab4c773793a17e 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/Iterator.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/Iterator.php
@@ -22,17 +22,15 @@ class Iterator extends ProcessPluginBase {
    * Runs a process pipeline on each destination property per list item.
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
-    $return = [];
-    if (!is_null($value)) {
-      foreach ($value as $key => $new_value) {
-        $new_row = new Row($new_value, []);
-        $migrate_executable->processRow($new_row, $this->configuration['process']);
-        $destination = $new_row->getDestination();
-        if (array_key_exists('key', $this->configuration)) {
-          $key = $this->transformKey($key, $migrate_executable, $new_row);
-        }
-        $return[$key] = $destination;
+    $return = array();
+    foreach ($value as $key => $new_value) {
+      $new_row = new Row($new_value, array());
+      $migrate_executable->processRow($new_row, $this->configuration['process']);
+      $destination = $new_row->getDestination();
+      if (array_key_exists('key', $this->configuration)) {
+        $key = $this->transformKey($key, $migrate_executable, $new_row);
       }
+      $return[$key] = $destination;
     }
     return $return;
   }
diff --git a/core/modules/migrate_drupal/tests/fixtures/drupal7.php b/core/modules/migrate_drupal/tests/fixtures/drupal7.php
index dbe6c8ef63e134d8811c8f9c208d266650234002..6853e1e875de9c03b6666868768c6442c94e83c5 100644
--- a/core/modules/migrate_drupal/tests/fixtures/drupal7.php
+++ b/core/modules/migrate_drupal/tests/fixtures/drupal7.php
@@ -3828,15 +3828,6 @@
   'data' => 'a:7:{s:5:"label";s:21:"Term Entity Reference";s:6:"widget";a:5:{s:6:"weight";s:2:"18";s:4:"type";s:33:"entityreference_autocomplete_tags";s:6:"module";s:15:"entityreference";s:6:"active";i:1;s:8:"settings";a:3:{s:14:"match_operator";s:8:"CONTAINS";s:4:"size";s:2:"60";s:4:"path";s:0:"";}}s:8:"settings";a:2:{s:9:"behaviors";a:1:{s:14:"taxonomy-index";a:1:{s:6:"status";b:1;}}s:18:"user_register_form";b:0;}s:7:"display";a:1:{s:7:"default";a:5:{s:5:"label";s:5:"above";s:4:"type";s:21:"entityreference_label";s:8:"settings";a:1:{s:4:"link";b:0;}s:6:"module";s:15:"entityreference";s:6:"weight";i:17;}}s:8:"required";i:0;s:11:"description";s:0:"";s:13:"default_value";N;}',
   'deleted' => '0',
 ))
-->values(array(
-  'id' => '41',
-  'field_id' => '20',
-  'field_name' => 'field_term_reference',
-  'entity_type' => 'taxonomy_term',
-  'bundle' => 'test_vocabulary',
-  'data' => 'a:7:{s:5:"label";s:14:"Term Reference";s:6:"widget";a:5:{s:6:"weight";s:2:"14";s:4:"type";s:21:"taxonomy_autocomplete";s:6:"module";s:8:"taxonomy";s:6:"active";i:0;s:8:"settings";a:2:{s:4:"size";i:60;s:17:"autocomplete_path";s:21:"taxonomy/autocomplete";}}s:8:"settings";a:1:{s:18:"user_register_form";b:0;}s:7:"display";a:1:{s:7:"default";a:4:{s:5:"label";s:5:"above";s:4:"type";s:6:"hidden";s:6:"weight";s:2:"13";s:8:"settings";a:0:{}}}s:8:"required";i:0;s:11:"description";s:0:"";s:13:"default_value";N;}',
-  'deleted' => '0',
-))
 ->execute();
 
 $connection->schema()->createTable('field_data_body', array(
@@ -4859,16 +4850,6 @@
   'delta' => '0',
   'field_integer_value' => '99',
 ))
-->values(array(
-  'entity_type' => 'taxonomy_term',
-  'bundle' => 'test_vocabulary',
-  'deleted' => '0',
-  'entity_id' => '4',
-  'revision_id' => '4',
-  'language' => 'und',
-  'delta' => '0',
-  'field_integer_value' => '6',
-))
 ->execute();
 
 $connection->schema()->createTable('field_data_field_integer_list', array(
@@ -5668,16 +5649,6 @@
   'delta' => '0',
   'field_term_reference_tid' => '4',
 ))
-->values(array(
-  'entity_type' => 'taxonomy_term',
-  'bundle' => 'test_vocabulary',
-  'deleted' => '0',
-  'entity_id' => '2',
-  'revision_id' => '2',
-  'language' => 'und',
-  'delta' => '0',
-  'field_term_reference_tid' => '3',
-))
 ->execute();
 
 $connection->schema()->createTable('field_data_field_text', array(
@@ -7052,16 +7023,6 @@
   'delta' => '0',
   'field_integer_value' => '99',
 ))
-->values(array(
-  'entity_type' => 'taxonomy_term',
-  'bundle' => 'test_vocabulary',
-  'deleted' => '0',
-  'entity_id' => '4',
-  'revision_id' => '4',
-  'language' => 'und',
-  'delta' => '0',
-  'field_integer_value' => '6',
-))
 ->execute();
 
 $connection->schema()->createTable('field_revision_field_integer_list', array(
@@ -7869,16 +7830,6 @@
   'delta' => '0',
   'field_term_reference_tid' => '4',
 ))
-->values(array(
-  'entity_type' => 'taxonomy_term',
-  'bundle' => 'test_vocabulary',
-  'deleted' => '0',
-  'entity_id' => '2',
-  'revision_id' => '2',
-  'language' => 'und',
-  'delta' => '0',
-  'field_term_reference_tid' => '3',
-))
 ->execute();
 
 $connection->schema()->createTable('field_revision_field_text', array(
diff --git a/core/modules/migrate_drupal_ui/src/Tests/d7/MigrateUpgrade7Test.php b/core/modules/migrate_drupal_ui/src/Tests/d7/MigrateUpgrade7Test.php
index 1a0e334fdee7c323d3f0917b7c3915488f4473b1..d69308580dfc8f76ba119094b3433f31b91ca59c 100644
--- a/core/modules/migrate_drupal_ui/src/Tests/d7/MigrateUpgrade7Test.php
+++ b/core/modules/migrate_drupal_ui/src/Tests/d7/MigrateUpgrade7Test.php
@@ -43,8 +43,8 @@ protected function getEntityCounts() {
       'configurable_language' => 4,
       'contact_form' => 3,
       'editor' => 2,
-      'field_config' => 49,
-      'field_storage_config' => 37,
+      'field_config' => 48,
+      'field_storage_config' => 36,
       'file' => 1,
       'filter_format' => 7,
       'image_style' => 6,
diff --git a/core/modules/taxonomy/migration_templates/d6_taxonomy_term.yml b/core/modules/taxonomy/migration_templates/d6_taxonomy_term.yml
index e5630fc62f783d63e3affb37366fb860209e1a5a..909fb4c116319a6dd5ef97117e1667bc8969285c 100644
--- a/core/modules/taxonomy/migration_templates/d6_taxonomy_term.yml
+++ b/core/modules/taxonomy/migration_templates/d6_taxonomy_term.yml
@@ -3,7 +3,7 @@ label: Taxonomy terms
 migration_tags:
   - Drupal 6
 source:
-  plugin: d6_taxonomy_term
+  plugin: taxonomy_term
 process:
   # If you are using this file to build a custom migration consider removing
   # the tid field to allow incremental migrations.
diff --git a/core/modules/taxonomy/migration_templates/d7_taxonomy_term.yml b/core/modules/taxonomy/migration_templates/d7_taxonomy_term.yml
index af8518006e2e3d2109a41bd902de092fd8796dd7..a47ab46b989fb4094bb2534fb5022d47a7fb3e31 100644
--- a/core/modules/taxonomy/migration_templates/d7_taxonomy_term.yml
+++ b/core/modules/taxonomy/migration_templates/d7_taxonomy_term.yml
@@ -2,9 +2,8 @@ id: d7_taxonomy_term
 label: Taxonomy terms
 migration_tags:
   - Drupal 7
-deriver: Drupal\taxonomy\Plugin\migrate\D7TaxonomyTermDeriver
 source:
-  plugin: d7_taxonomy_term
+  plugin: taxonomy_term
 process:
   # If you are using this file to build a custom migration consider removing
   # the tid field to allow incremental migrations.
@@ -36,5 +35,3 @@ destination:
 migration_dependencies:
   required:
     - d7_taxonomy_vocabulary
-  optional:
-    - d7_field_instance
diff --git a/core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php b/core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php
deleted file mode 100644
index ed18c66d4d5dd781abff13e3186846555e5759cd..0000000000000000000000000000000000000000
--- a/core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php
+++ /dev/null
@@ -1,129 +0,0 @@
-<?php
-
-namespace Drupal\taxonomy\Plugin\migrate;
-
-use Drupal\Component\Plugin\Derivative\DeriverBase;
-use Drupal\Component\Plugin\Exception\PluginNotFoundException;
-use Drupal\Core\Database\DatabaseExceptionWrapper;
-use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
-use Drupal\migrate\Exception\RequirementsException;
-use Drupal\migrate\Plugin\MigrationDeriverTrait;
-use Drupal\migrate_drupal\Plugin\MigrateCckFieldPluginManagerInterface;
-use Symfony\Component\DependencyInjection\ContainerInterface;
-
-/**
- * Deriver for Drupal 7 taxonomy term migrations based on vocabularies.
- */
-class D7TaxonomyTermDeriver extends DeriverBase implements ContainerDeriverInterface {
-  use MigrationDeriverTrait;
-
-  /**
-   * The base plugin ID this derivative is for.
-   *
-   * @var string
-   */
-  protected $basePluginId;
-
-  /**
-   * Already-instantiated cckfield plugins, keyed by ID.
-   *
-   * @var \Drupal\migrate_drupal\Plugin\MigrateCckFieldInterface[]
-   */
-  protected $cckPluginCache;
-
-  /**
-   * The CCK plugin manager.
-   *
-   * @var \Drupal\migrate_drupal\Plugin\MigrateCckFieldPluginManagerInterface
-   */
-  protected $cckPluginManager;
-
-  /**
-   * D7TaxonomyTermDeriver constructor.
-   *
-   * @param string $base_plugin_id
-   *   The base plugin ID for the plugin ID.
-   * @param \Drupal\migrate_drupal\Plugin\MigrateCckFieldPluginManagerInterface $cck_manager
-   *   The CCK plugin manager.
-   */
-  public function __construct($base_plugin_id, MigrateCckFieldPluginManagerInterface $cck_manager) {
-    $this->basePluginId = $base_plugin_id;
-    $this->cckPluginManager = $cck_manager;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public static function create(ContainerInterface $container, $base_plugin_id) {
-    return new static(
-      $base_plugin_id,
-      $container->get('plugin.manager.migrate.cckfield')
-    );
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getDerivativeDefinitions($base_plugin_definition) {
-    $fields = [];
-    try {
-      $source_plugin = static::getSourcePlugin('d7_field_instance');
-      $source_plugin->checkRequirements();
-
-      // Read all field instance definitions in the source database.
-      foreach ($source_plugin as $row) {
-        if ($row->getSourceProperty('entity_type') == 'taxonomy_term') {
-          $fields[$row->getSourceProperty('bundle')][$row->getSourceProperty('field_name')] = $row->getSource();
-        }
-      }
-    }
-    catch (RequirementsException $e) {
-      // If checkRequirements() failed then the field module did not exist and
-      // we do not have any fields. Therefore, $fields will be empty and below
-      // we'll create a migration just for the node properties.
-    }
-
-    try {
-      foreach (static::getSourcePlugin('d7_taxonomy_vocabulary') as $row) {
-        $bundle = $row->getSourceProperty('machine_name');
-        $values = $base_plugin_definition;
-
-        $values['label'] = t('@label (@type)', [
-          '@label' => $values['label'],
-          '@type' => $row->getSourceProperty('name'),
-        ]);
-        $values['source']['bundle'] = $bundle;
-        $values['destination']['default_bundle'] = $bundle;
-
-        /** @var Migration $migration */
-        $migration = \Drupal::service('plugin.manager.migration')->createStubMigration($values);
-        if (isset($fields[$bundle])) {
-          foreach ($fields[$bundle] as $field_name => $info) {
-            $field_type = $info['type'];
-            try {
-              $plugin_id = $this->cckPluginManager->getPluginIdFromFieldType($field_type, ['core' => 7], $migration);
-              if (!isset($this->cckPluginCache[$field_type])) {
-                $this->cckPluginCache[$field_type] = $this->cckPluginManager->createInstance($plugin_id, ['core' => 7], $migration);
-              }
-              $this->cckPluginCache[$field_type]
-                ->processCckFieldValues($migration, $field_name, $info);
-            }
-            catch (PluginNotFoundException $ex) {
-              $migration->setProcessOfProperty($field_name, $field_name);
-            }
-          }
-        }
-        $this->derivatives[$bundle] = $migration->getPluginDefinition();
-      }
-    }
-    catch (DatabaseExceptionWrapper $e) {
-      // Once we begin iterating the source plugin it is possible that the
-      // source tables will not exist. This can happen when the
-      // MigrationPluginManager gathers up the migration definitions but we do
-      // not actually have a Drupal 7 source database.
-    }
-
-    return $this->derivatives;
-  }
-
-}
diff --git a/core/modules/taxonomy/src/Plugin/migrate/source/Term.php b/core/modules/taxonomy/src/Plugin/migrate/source/Term.php
index 14dda1f5a31cbda92fdf4458c9a656e8771a30ce..0b2a5c3199e873f857e712166400d12a6f675ad8 100644
--- a/core/modules/taxonomy/src/Plugin/migrate/source/Term.php
+++ b/core/modules/taxonomy/src/Plugin/migrate/source/Term.php
@@ -14,10 +14,6 @@
  *   id = "taxonomy_term",
  *   source_provider = "taxonomy"
  * )
- *
- * @deprecated in Drupal 8.3.0, intended to be removed in Drupal 9.0.0.
- *   Use \Drupal\taxonomy\Plugin\migrate\source\d6\Term or
- *   \Drupal\taxonomy\Plugin\migrate\source\d7\Term.
  */
 class Term extends DrupalSqlBase {
 
diff --git a/core/modules/taxonomy/src/Plugin/migrate/source/d6/Term.php b/core/modules/taxonomy/src/Plugin/migrate/source/d6/Term.php
deleted file mode 100644
index 0418277a26086cf1b5e10fd529b6fba0bd75bf52..0000000000000000000000000000000000000000
--- a/core/modules/taxonomy/src/Plugin/migrate/source/d6/Term.php
+++ /dev/null
@@ -1,74 +0,0 @@
-<?php
-
-namespace Drupal\taxonomy\Plugin\migrate\source\d6;
-
-use Drupal\migrate\Row;
-use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;
-
-/**
- * Taxonomy term source from database.
- *
- * @todo Support term_relation, term_synonym table if possible.
- *
- * @MigrateSource(
- *   id = "d6_taxonomy_term",
- *   source_provider = "taxonomy"
- * )
- */
-class Term extends DrupalSqlBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function query() {
-    $query = $this->select('term_data', 'td')
-      ->fields('td')
-      ->distinct()
-      ->orderBy('td.tid');
-
-    if (isset($this->configuration['bundle'])) {
-      $query->condition('td.vid', $this->configuration['bundle'], 'IN');
-    }
-
-    return $query;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function fields() {
-    $fields = [
-      'tid' => $this->t('The term ID.'),
-      'vid' => $this->t('Existing term VID'),
-      'name' => $this->t('The name of the term.'),
-      'description' => $this->t('The term description.'),
-      'weight' => $this->t('Weight'),
-      'parent' => $this->t("The Drupal term IDs of the term's parents."),
-    ];
-    return $fields;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function prepareRow(Row $row) {
-    // Find parents for this row.
-    $parents = $this->select('term_hierarchy', 'th')
-      ->fields('th', ['parent', 'tid'])
-      ->condition('tid', $row->getSourceProperty('tid'))
-      ->execute()
-      ->fetchCol();
-    $row->setSourceProperty('parent', $parents);
-
-    return parent::prepareRow($row);
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getIds() {
-    $ids['tid']['type'] = 'integer';
-    return $ids;
-  }
-
-}
diff --git a/core/modules/taxonomy/src/Plugin/migrate/source/d7/Term.php b/core/modules/taxonomy/src/Plugin/migrate/source/d7/Term.php
deleted file mode 100644
index 354f37d05cb1e46c7c3e857c794fae846dbc2c85..0000000000000000000000000000000000000000
--- a/core/modules/taxonomy/src/Plugin/migrate/source/d7/Term.php
+++ /dev/null
@@ -1,84 +0,0 @@
-<?php
-
-namespace Drupal\taxonomy\Plugin\migrate\source\d7;
-
-use Drupal\migrate\Row;
-use Drupal\migrate_drupal\Plugin\migrate\source\d7\FieldableEntity;
-
-/**
- * Taxonomy term source from database.
- *
- * @todo Support term_relation, term_synonym table if possible.
- *
- * @MigrateSource(
- *   id = "d7_taxonomy_term",
- *   source_provider = "taxonomy"
- * )
- */
-class Term extends FieldableEntity {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function query() {
-    $query = $this->select('taxonomy_term_data', 'td')
-      ->fields('td')
-      ->distinct()
-      ->orderBy('tid');
-    $query->leftJoin('taxonomy_vocabulary', 'tv', 'td.vid = tv.vid');
-    $query->addField('tv', 'machine_name');
-
-    if (isset($this->configuration['bundle'])) {
-      $query->condition('tv.machine_name', $this->configuration['bundle'], 'IN');
-    }
-
-    return $query;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function fields() {
-    $fields = [
-      'tid' => $this->t('The term ID.'),
-      'vid' => $this->t('Existing term VID'),
-      'machine_name' => $this->t('Vocabulary machine name'),
-      'name' => $this->t('The name of the term.'),
-      'description' => $this->t('The term description.'),
-      'weight' => $this->t('Weight'),
-      'parent' => $this->t("The Drupal term IDs of the term's parents."),
-      'format' => $this->t("Format of the term description."),
-    ];
-    return $fields;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function prepareRow(Row $row) {
-    // Get Field API field values.
-    foreach (array_keys($this->getFields('taxonomy_term', $row->getSourceProperty('machine_name'))) as $field) {
-      $tid = $row->getSourceProperty('tid');
-      $row->setSourceProperty($field, $this->getFieldValues('taxonomy_term', $field, $tid));
-    }
-
-    // Find parents for this row.
-    $parents = $this->select('taxonomy_term_hierarchy', 'th')
-      ->fields('th', ['parent', 'tid'])
-      ->condition('tid', $row->getSourceProperty('tid'))
-      ->execute()
-      ->fetchCol();
-    $row->setSourceProperty('parent', $parents);
-
-    return parent::prepareRow($row);
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getIds() {
-    $ids['tid']['type'] = 'integer';
-    return $ids;
-  }
-
-}
diff --git a/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateTaxonomyTermTest.php b/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateTaxonomyTermTest.php
index fbcc1297953676036e2aa9b4aa10e3befc53a2a4..c7e7828a5eeb2bd8c57eb74641ed359afda11b0e 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateTaxonomyTermTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Migrate/d7/MigrateTaxonomyTermTest.php
@@ -13,16 +13,7 @@
  */
 class MigrateTaxonomyTermTest extends MigrateDrupal7TestBase {
 
-  public static $modules = [
-    'comment',
-    'datetime',
-    'image',
-    'link',
-    'node',
-    'taxonomy',
-    'telephone',
-    'text',
-  ];
+  public static $modules = array('taxonomy', 'text');
 
   /**
    * The cached taxonomy tree items, keyed by vid and tid.
@@ -37,16 +28,7 @@ class MigrateTaxonomyTermTest extends MigrateDrupal7TestBase {
   protected function setUp() {
     parent::setUp();
     $this->installEntitySchema('taxonomy_term');
-    $this->installConfig(static::$modules);
-
-    $this->executeMigrations([
-      'd7_node_type',
-      'd7_comment_type',
-      'd7_field',
-      'd7_taxonomy_vocabulary',
-      'd7_field_instance',
-      'd7_taxonomy_term'
-    ]);
+    $this->executeMigrations(['d7_taxonomy_vocabulary', 'd7_taxonomy_term']);
   }
 
   /**
@@ -66,12 +48,8 @@ protected function setUp() {
    *   The weight the migrated entity should have.
    * @param array $expected_parents
    *   The parent terms the migrated entity should have.
-   * @param int $expected_field_integer_value
-   *   The value the migrated entity field should have.
-   * @param int $expected_term_reference_tid
-   *   The term reference id the migrated entity field should have.
    */
-  protected function assertEntity($id, $expected_label, $expected_vid, $expected_description = '', $expected_format = NULL, $expected_weight = 0, $expected_parents = [], $expected_field_integer_value = NULL, $expected_term_reference_tid = NULL) {
+  protected function assertEntity($id, $expected_label, $expected_vid, $expected_description = '', $expected_format = NULL, $expected_weight = 0, $expected_parents = []) {
     /** @var \Drupal\taxonomy\TermInterface $entity */
     $entity = Term::load($id);
     $this->assertTrue($entity instanceof TermInterface);
@@ -82,14 +60,6 @@ protected function assertEntity($id, $expected_label, $expected_vid, $expected_d
     $this->assertEqual($expected_weight, $entity->getWeight());
     $this->assertIdentical($expected_parents, $this->getParentIDs($id));
     $this->assertHierarchy($expected_vid, $id, $expected_parents);
-    if (!is_null($expected_field_integer_value)) {
-      $this->assertTrue($entity->hasField('field_integer'));
-      $this->assertEquals($expected_field_integer_value, $entity->field_integer->value);
-    }
-    if (!is_null($expected_term_reference_tid)) {
-      $this->assertTrue($entity->hasField('field_integer'));
-      $this->assertEquals($expected_term_reference_tid, $entity->field_term_reference->target_id);
-    }
   }
 
   /**
@@ -97,9 +67,9 @@ protected function assertEntity($id, $expected_label, $expected_vid, $expected_d
    */
   public function testTaxonomyTerms() {
     $this->assertEntity(1, 'General discussion', 'forums', '', NULL, 2);
-    $this->assertEntity(2, 'Term1', 'test_vocabulary', 'The first term.', 'filtered_html', 0, [], NULL, 3);
+    $this->assertEntity(2, 'Term1', 'test_vocabulary', 'The first term.', 'filtered_html');
     $this->assertEntity(3, 'Term2', 'test_vocabulary', 'The second term.', 'filtered_html');
-    $this->assertEntity(4, 'Term3', 'test_vocabulary', 'The third term.', 'full_html', 0, [3], 6);
+    $this->assertEntity(4, 'Term3', 'test_vocabulary', 'The third term.', 'full_html', 0, [3]);
     $this->assertEntity(5, 'Custom Forum', 'forums', 'Where the cool kids are.', NULL, 3);
     $this->assertEntity(6, 'Games', 'forums', '', NULL, 4);
     $this->assertEntity(7, 'Minecraft', 'forums', '', NULL, 1, [6]);
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermSourceWithVocabularyFilterTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/TermSourceWithVocabularyFilterTest.php
similarity index 87%
rename from core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermSourceWithVocabularyFilterTest.php
rename to core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/TermSourceWithVocabularyFilterTest.php
index 42fa75d0fff2cab4f8fccd88a8db0f76a5de69c4..4ac2766d71c80da8f98da59c547a5caf2f14198a 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermSourceWithVocabularyFilterTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/TermSourceWithVocabularyFilterTest.php
@@ -1,11 +1,11 @@
 <?php
 
-namespace Drupal\Tests\taxonomy\Kernel\Plugin\migrate\source\d6;
+namespace Drupal\Tests\taxonomy\Kernel\Plugin\migrate\source;
 
 /**
  * Tests the taxonomy term source with vocabulary filter.
  *
- * @covers \Drupal\taxonomy\Plugin\migrate\source\d6\Term
+ * @covers \Drupal\taxonomy\Plugin\migrate\source\Term
  * @group taxonomy
  */
 class TermSourceWithVocabularyFilterTest extends TermTest {
@@ -47,7 +47,7 @@ public function providerSource() {
 
     // Set up source plugin configuration.
     $tests[0]['configuration'] = [
-      'bundle' => [5],
+      'vocabulary' => [5],
     ];
 
     return $tests;
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/TermTest.php
similarity index 96%
rename from core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTest.php
rename to core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/TermTest.php
index 29e23b866cf7246dc4cb355188301dc7c7791271..bdffcf81c2a0183ed0bf343afcc4556e9834b00f 100644
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/TermTest.php
@@ -1,13 +1,13 @@
 <?php
 
-namespace Drupal\Tests\taxonomy\Kernel\Plugin\migrate\source\d6;
+namespace Drupal\Tests\taxonomy\Kernel\Plugin\migrate\source;
 
 use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
 
 /**
  * Tests taxonomy term source plugin.
  *
- * @covers \Drupal\taxonomy\Plugin\migrate\source\d6\Term
+ * @covers \Drupal\taxonomy\Plugin\migrate\source\Term
  * @group taxonomy
  */
 class TermTest extends MigrateSqlSourceTestBase {
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermSourceWithVocabularyFilterTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermSourceWithVocabularyFilterTest.php
deleted file mode 100644
index e03a6ab563ca8b683f58a4f5dcb824a294a381cc..0000000000000000000000000000000000000000
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermSourceWithVocabularyFilterTest.php
+++ /dev/null
@@ -1,56 +0,0 @@
-<?php
-
-namespace Drupal\Tests\taxonomy\Kernel\Plugin\migrate\source\d7;
-
-/**
- * Tests the taxonomy term source with vocabulary filter.
- *
- * @covers \Drupal\taxonomy\Plugin\migrate\source\d7\Term
- * @group taxonomy
- */
-class TermSourceWithVocabularyFilterTest extends TermTest {
-
-  /**
-   * {@inheritdoc}
-   */
-  public static $modules = ['taxonomy', 'migrate_drupal'];
-
-  /**
-   * {@inheritdoc}
-   */
-  public function providerSource() {
-    // Get the source data from parent.
-    $tests = parent::providerSource();
-
-    // The expected results.
-    $tests[0]['expected_data'] = [
-      [
-        'tid' => 1,
-        'vid' => 5,
-        'name' => 'name value 1',
-        'description' => 'description value 1',
-        'weight' => 0,
-        'parent' => [0],
-      ],
-      [
-        'tid' => 4,
-        'vid' => 5,
-        'name' => 'name value 4',
-        'description' => 'description value 4',
-        'weight' => 1,
-        'parent' => [1],
-      ],
-    ];
-
-    // We know there are two rows with machine_name == 'tags'.
-    $tests[0]['expected_count'] = 2;
-
-    // Set up source plugin configuration.
-    $tests[0]['configuration'] = [
-      'bundle' => ['tags'],
-    ];
-
-    return $tests;
-  }
-
-}
diff --git a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTest.php
deleted file mode 100644
index e20e4c0c8c6e5731d4e6de137a4d5659ec293d7c..0000000000000000000000000000000000000000
--- a/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d7/TermTest.php
+++ /dev/null
@@ -1,197 +0,0 @@
-<?php
-
-namespace Drupal\Tests\taxonomy\Kernel\Plugin\migrate\source\d7;
-
-use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
-
-/**
- * Tests taxonomy term source plugin.
- *
- * @covers \Drupal\taxonomy\Plugin\migrate\source\d7\Term
- * @group taxonomy
- */
-class TermTest extends MigrateSqlSourceTestBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public static $modules = ['taxonomy', 'migrate_drupal'];
-
-  /**
-   * {@inheritdoc}
-   */
-  public function providerSource() {
-    $tests = [];
-
-    // The source data.
-    $tests[0]['source_data']['taxonomy_term_data'] = [
-      [
-        'tid' => 1,
-        'vid' => 5,
-        'name' => 'name value 1',
-        'description' => 'description value 1',
-        'weight' => 0,
-      ],
-      [
-        'tid' => 2,
-        'vid' => 6,
-        'name' => 'name value 2',
-        'description' => 'description value 2',
-        'weight' => 0,
-      ],
-      [
-        'tid' => 3,
-        'vid' => 6,
-        'name' => 'name value 3',
-        'description' => 'description value 3',
-        'weight' => 0,
-      ],
-      [
-        'tid' => 4,
-        'vid' => 5,
-        'name' => 'name value 4',
-        'description' => 'description value 4',
-        'weight' => 1,
-      ],
-      [
-        'tid' => 5,
-        'vid' => 6,
-        'name' => 'name value 5',
-        'description' => 'description value 5',
-        'weight' => 1,
-      ],
-      [
-        'tid' => 6,
-        'vid' => 6,
-        'name' => 'name value 6',
-        'description' => 'description value 6',
-        'weight' => 0,
-      ],
-    ];
-    $tests[0]['source_data']['taxonomy_term_hierarchy'] = [
-      [
-        'tid' => 1,
-        'parent' => 0,
-      ],
-      [
-        'tid' => 2,
-        'parent' => 0,
-      ],
-      [
-        'tid' => 3,
-        'parent' => 0,
-      ],
-      [
-        'tid' => 4,
-        'parent' => 1,
-      ],
-      [
-        'tid' => 5,
-        'parent' => 2,
-      ],
-      [
-        'tid' => 6,
-        'parent' => 3,
-      ],
-      [
-        'tid' => 6,
-        'parent' => 2,
-      ],
-    ];
-    $tests[0]['source_data']['taxonomy_vocabulary'] = [
-      [
-        'vid' => 5,
-        'machine_name' => 'tags',
-      ],
-      [
-        'vid' => 6,
-        'machine_name' => 'categories',
-      ],
-    ];
-    $tests[0]['source_data']['field_config_instance'] = [
-      [
-        'field_name' => 'field_term_field',
-        'entity_type' => 'taxonomy_term',
-        'bundle' => 'tags',
-        'deleted' => 0,
-      ],
-      [
-        'field_name' => 'field_term_field',
-        'entity_type' => 'taxonomy_term',
-        'bundle' => 'categories',
-        'deleted' => 0,
-      ],
-    ];
-    $tests[0]['source_data']['field_data_field_term_field'] = [
-      [
-        'entity_type' => 'taxonomy_term',
-        'bundle' => 'tags',
-        'deleted' => 0,
-        'entity_id' => 1,
-        'delta' => 0,
-      ],
-      [
-        'entity_type' => 'taxonomy_term',
-        'bundle' => 'categories',
-        'deleted' => 0,
-        'entity_id' => 1,
-        'delta' => 0,
-      ],
-    ];
-
-    // The expected results.
-    $tests[0]['expected_data'] = [
-      [
-        'tid' => 1,
-        'vid' => 5,
-        'name' => 'name value 1',
-        'description' => 'description value 1',
-        'weight' => 0,
-        'parent' => [0],
-      ],
-      [
-        'tid' => 2,
-        'vid' => 6,
-        'name' => 'name value 2',
-        'description' => 'description value 2',
-        'weight' => 0,
-        'parent' => [0],
-      ],
-      [
-        'tid' => 3,
-        'vid' => 6,
-        'name' => 'name value 3',
-        'description' => 'description value 3',
-        'weight' => 0,
-        'parent' => [0],
-      ],
-      [
-        'tid' => 4,
-        'vid' => 5,
-        'name' => 'name value 4',
-        'description' => 'description value 4',
-        'weight' => 1,
-        'parent' => [1],
-      ],
-      [
-        'tid' => 5,
-        'vid' => 6,
-        'name' => 'name value 5',
-        'description' => 'description value 5',
-        'weight' => 1,
-        'parent' => [2],
-      ],
-      [
-        'tid' => 6,
-        'vid' => 6,
-        'name' => 'name value 6',
-        'description' => 'description value 6',
-        'weight' => 0,
-        'parent' => [3, 2],
-      ],
-    ];
-
-    return $tests;
-  }
-
-}