diff --git a/core/modules/block/block.module b/core/modules/block/block.module
index 069e8792bc450b07a60bc846715390b4f0aa64a5..488904ca182fc7431d2759f7b9be87aa0c649026 100644
--- a/core/modules/block/block.module
+++ b/core/modules/block/block.module
@@ -468,10 +468,10 @@ function _block_rehash($theme = NULL) {
       if (!isset($block['weight'])) {
         $block['weight'] = 0;
       }
-      if (!empty($block['region']) && $block['region'] != BLOCK_REGION_NONE && !isset($regions[$block['region']])) {
+      if (!empty($block['region']) && $block['region'] != BLOCK_REGION_NONE && !isset($regions[$block['region']]) && $block['status'] == 1) {
         drupal_set_message(t('The block %info was assigned to the invalid region %region and has been disabled.', array('%info' => $block['info'], '%region' => $block['region'])), 'warning');
         // Disabled modules are moved into the BLOCK_REGION_NONE later so no
-        // need to move the bock to another region.
+        // need to move the block to another region.
         $block['status'] = 0;
       }
       // Set region to none if not enabled and make sure status is set.
diff --git a/core/modules/block/block.test b/core/modules/block/block.test
index f4a95496bbcf6a0f8927e67ce0f6b90d1731b2ca..a5bde420ebcbd7989d3b955d863aa72bbc96b7e3 100644
--- a/core/modules/block/block.test
+++ b/core/modules/block/block.test
@@ -1030,3 +1030,69 @@ class BlockLanguageTestCase extends DrupalWebTestCase {
     $this->assertTrue($count == 0, t('The block language visibility do not have an entry in the database.'));
   }
 }
+
+/**
+ * Tests that a block assigned to an invalid region triggers the warning.
+ */
+class BlockInvalidRegionTestCase extends DrupalWebTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'Blocks in invalid regions',
+      'description' => 'Checks that an active block assigned to a non-existing region triggers the warning message and is disabled.',
+      'group' => 'Block',
+    );
+  }
+
+  function setUp() {
+    parent::setUp(array('block', 'block_test'));
+    // Create an admin user.
+    $admin_user = $this->drupalCreateUser(array('administer site configuration', 'access administration pages'));
+    $this->drupalLogin($admin_user);
+  }
+
+  /**
+   * Tests that blocks assigned to invalid regions work correctly.
+   */
+  function testBlockInInvalidRegion() {
+    // Enable a test block in the default theme and place it in an invalid region.
+    db_merge('block')
+      ->key(array(
+        'module' => 'block_test',
+        'delta' => 'test_html_id',
+        'theme' => variable_get('theme_default', 'stark'),
+      ))
+      ->fields(array(
+        'status' => 1,
+        'region' => 'invalid_region',
+        'cache' => DRUPAL_NO_CACHE,
+      ))
+      ->execute();
+
+    $warning_message = t('The block %info was assigned to the invalid region %region and has been disabled.', array('%info' => t('Test block html id'), '%region' => 'invalid_region'));
+
+    // Clearing the cache should disable the test block placed in the invalid region.
+    $this->drupalPost('admin/config/development/performance', array(), 'Clear all caches');
+    $this->assertRaw($warning_message, 'Enabled block was in the invalid region and has been disabled.');
+
+    // Clear the cache to check if the warning message is not triggered.
+    $this->drupalPost('admin/config/development/performance', array(), 'Clear all caches');
+    $this->assertNoRaw($warning_message, 'Disabled block in the invalid region will not trigger the warning.');
+
+    // Place disabled test block in the invalid region of the default theme.
+    db_merge('block')
+      ->key(array(
+        'module' => 'block_test',
+        'delta' => 'test_html_id',
+        'theme' => variable_get('theme_default', 'stark'),
+      ))
+      ->fields(array(
+        'region' => 'invalid_region',
+        'cache' => DRUPAL_NO_CACHE,
+      ))
+      ->execute();
+
+    // Clear the cache to check if the warning message is not triggered.
+    $this->drupalPost('admin/config/development/performance', array(), 'Clear all caches');
+    $this->assertNoRaw($warning_message, 'Disabled block in the invalid region will not trigger the warning.');
+  }
+}