diff -u b/core/modules/field_sql_storage/field_sql_storage.install b/core/modules/field_sql_storage/field_sql_storage.install
--- b/core/modules/field_sql_storage/field_sql_storage.install
+++ b/core/modules/field_sql_storage/field_sql_storage.install
@@ -13,22 +13,20 @@
 function field_sql_storage_schema() {
   $schema = array();
 
-  if (!defined('MAINTENANCE_MODE')) {
-    // Loading entities within hook_schema() triggers lots of race conditions.
-    // Read definitions for raw storage instead (configuration, and state for
-    // deleted fields).
-    $fields = array();
-    foreach (config_get_storage_names_with_prefix('field.field') as $name) {
-      $fields[] = config($name)->get();
-    }
-    $deleted_fields = state()->get('field.field.deleted') ?: array();
-    $fields = array_merge($fields, $deleted_fields);
-    
-    foreach ($fields as $field) {
-      if ($field['storage']['type'] == 'field_sql_storage') {
-        $field = new Field($field);
-        $schema += _field_sql_storage_schema($field);
-      }
+  // Loading entities within hook_schema() triggers lots of race conditions.
+  // Read definitions for raw storage instead (configuration, and state for
+  // deleted fields).
+  $fields = array();
+  foreach (config_get_storage_names_with_prefix('field.field') as $name) {
+    $fields[] = config($name)->get();
+  }
+  $deleted_fields = state()->get('field.field.deleted') ?: array();
+  $fields = array_merge($fields, $deleted_fields);
+
+  foreach ($fields as $field) {
+    if ($field['storage']['type'] == 'field_sql_storage') {
+      $field = new Field($field);
+      $schema += _field_sql_storage_schema($field);
     }
   }
 
diff -u b/core/modules/system/lib/Drupal/system/Tests/Upgrade/FieldUpgradePathTest.php b/core/modules/system/lib/Drupal/system/Tests/Upgrade/FieldUpgradePathTest.php
--- b/core/modules/system/lib/Drupal/system/Tests/Upgrade/FieldUpgradePathTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Upgrade/FieldUpgradePathTest.php
@@ -205,7 +205,6 @@
     field_attach_load('node', array(2 => $entity), FIELD_LOAD_CURRENT, array('field_id' => $deleted_field['uuid'], 'deleted' => 1));
     $deleted_value = $entity->get('test_deleted_field');
     $this->assertEqual($deleted_value[LANGUAGE_NOT_SPECIFIED][0]['value'], 'Some deleted value');
-    $this->assertEqual($deleted_value[LANGUAGE_NOT_SPECIFIED][0]['format'], 'filtered_html');
 
     // Check that creation of a new node works as expected.
     $value = $this->randomName();
diff -u b/core/modules/system/tests/upgrade/drupal-7.field.database.php b/core/modules/system/tests/upgrade/drupal-7.field.database.php
--- b/core/modules/system/tests/upgrade/drupal-7.field.database.php
+++ b/core/modules/system/tests/upgrade/drupal-7.field.database.php
@@ -116,7 +116,9 @@
     'locked' => 0,
     'data' => serialize(array(
       'entity_types' => array(),
-      'settings' => array(),
+      'settings' => array(
+        'max_length' => 255,
+      ),
       'storage' => array(
         'type' => 'field_sql_storage',
         'settings' => array(),
@@ -158,7 +160,7 @@
         ),
       ),
       'settings' => array(
-        'text_processing' => 1,
+        'text_processing' => 0,
         'user_register_form' => FALSE,
       ),
       'display' => array(
@@ -374,7 +376,6 @@
   'language' => 'und',
   'delta' => '0',
   'test_deleted_field_value' => 'Some deleted value',
-  'test_deleted_field_format' => 'filtered_html',
 );
 db_insert("field_deleted_data_{$field_id}")
   ->fields($field_data_row)