diff --git a/core/modules/block/tests/src/Kernel/Migrate/d6/MigrateBlockTest.php b/core/modules/block/tests/src/Kernel/Migrate/d6/MigrateBlockTest.php
index d5eca1bcf9..55f48c3e5a 100644
--- a/core/modules/block/tests/src/Kernel/Migrate/d6/MigrateBlockTest.php
+++ b/core/modules/block/tests/src/Kernel/Migrate/d6/MigrateBlockTest.php
@@ -308,8 +308,8 @@ public function testBlockMigration() {
 
     // Check migrate messages.
     $messages = iterator_to_array($this->getMigration('d6_block')->getIdMap()->getMessages());
-    $this->assertCount(3, $messages);
-    $this->assertSame($messages[2]->message, 'Schema errors for block.block.aggregator with the following errors: block.block.aggregator:settings.block_count missing schema, block.block.aggregator:settings.feed missing schema');
+    $this->assertCount(2, $messages);
+    $this->assertSame($messages[1]->message, 'Schema errors for block.block.aggregator with the following errors: block.block.aggregator:settings.block_count missing schema, block.block.aggregator:settings.feed missing schema');
   }
 
 }