diff --git a/core/modules/migrate_drupal/lib/Drupal/migrate_drupal/Tests/Dump/Drupal6TaxonomyVocabulary.php b/core/modules/migrate_drupal/lib/Drupal/migrate_drupal/Tests/Dump/Drupal6TaxonomyVocabulary.php
index ea1c073..148d1cd 100644
--- a/core/modules/migrate_drupal/lib/Drupal/migrate_drupal/Tests/Dump/Drupal6TaxonomyVocabulary.php
+++ b/core/modules/migrate_drupal/lib/Drupal/migrate_drupal/Tests/Dump/Drupal6TaxonomyVocabulary.php
@@ -180,7 +180,10 @@ public function load() {
       'weight' => '6',
     ))
     ->values(array(
-      'vid' => '4',
+      // Skipping vid 4 here, since it is already in use by
+      // Drupal6VocabularyField::load() and throws an
+      // IntegrityConstraintViolationException during MigrateDrupal6Test.
+      'vid' => '5',
       'name' => 'vocabulary name much longer than thirty two characters',
       'description' => 'description of vocabulary name much longer than thirty two characters',
       'help' => '',