diff --git a/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php
index a898a6c..46421a1 100644
--- a/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateSqlIdMapEnsureTablesTest.php
@@ -72,6 +72,10 @@ public function testEnsureTablesNotExist() {
       'description' => 'Mappings from source identifier value(s) to destination identifier value(s).',
       'fields' => $fields,
       'primary key' => array('source_ids_hash'),
+      'indexes' => [
+        'source' => ['sourceid1'],
+        'destination' => ['destid1'],
+      ],
     );
     $schema = $this->getMockBuilder('Drupal\Core\Database\Schema')
       ->disableOriginalConstructor()