diff -u b/core/modules/block_content/tests/src/Functional/BlockContentCreationTest.php b/core/modules/block_content/tests/src/Functional/BlockContentCreationTest.php
--- b/core/modules/block_content/tests/src/Functional/BlockContentCreationTest.php
+++ b/core/modules/block_content/tests/src/Functional/BlockContentCreationTest.php
@@ -65,7 +65,7 @@
     // Check that the block exists in the database.
     $blocks = \Drupal::entityTypeManager()
       ->getStorage('block_content')
-      ->loadByProperties('block_content', ['info' => $edit['info[0][value]']]);
+      ->loadByProperties(['info' => $edit['info[0][value]']]);
     $block = reset($blocks);
     $this->assertTrue($block, 'Custom Block found in database.');
 
@@ -147,7 +147,7 @@
     // Check that the block exists in the database.
     $blocks = \Drupal::entityTypeManager()
       ->getStorage('block_content')
-      ->loadByProperties('block_content', ['info' => $edit['info[0][value]']]);
+      ->loadByProperties(['info' => $edit['info[0][value]']]);
     $block = reset($blocks);
     $this->assertTrue($block, 'Custom Block found in database.');
 
@@ -184,7 +184,7 @@
     // Check that the block exists in the database.
     $blocks = \Drupal::entityTypeManager()
       ->getStorage('block_content')
-      ->loadByProperties('block_content', ['info' => $edit['info[0][value]']]);
+      ->loadByProperties(['info' => $edit['info[0][value]']]);
     $block = reset($blocks);
     $this->assertTrue($block, 'Default Custom Block found in database.');
   }