diff --git a/core/modules/block/lib/Drupal/block/Tests/BlockTest.php b/core/modules/block/lib/Drupal/block/Tests/BlockTest.php
index 88df26d..44593cf 100644
--- a/core/modules/block/lib/Drupal/block/Tests/BlockTest.php
+++ b/core/modules/block/lib/Drupal/block/Tests/BlockTest.php
@@ -436,13 +436,17 @@ function testBlockModuleDisable() {
     $this->drupalPost('admin/structure/block/manage/' . $block_id . '/stark', $edit, t('Save block'));
     $this->assertText(t('The block configuration has been saved.'));
 
+    // Update the weight of a block.
+    $edit = array('blocks[0][weight]' => -1);
+    $this->drupalPost('admin/structure/block', $edit, t('Save blocks'));
+
     // Re-enable the module and refresh the definitions cache.
     module_enable(array('block_test'), FALSE);
     $manager->clearCachedDefinitions();
 
     // Reload the admin page and confirm the block can again be configured.
     $this->drupalGet('admin/structure/block');
-    $this->assertLinkByHref(url('admin/structure/block/manage/plugin.core.block.stark.' . $edit['machine_name'] . '/stark/config'));
+    $this->assertLinkByHref(url('admin/structure/block/manage/plugin.core.block.stark.' . $block['machine_name'] . '/stark/config'));
 
     // Confirm that the block is again displayed on the front page.
     $this->drupalGet('');