Update to Drupal 8.2.1. For more information, see https://www.drupal.org/project/drupal/releases/8.2.1

core/modules/block/tests/fixtures/update/block.block.missing_schema.yml

@@ -0,0 +1,28 @@
+uuid: 1a6c0f14-78dc-4ede-bade-b8ce83881453
+langcode: en
+status: true
+dependencies:
+  module:
+    - block_test
+    - system
+  theme:
+    - bartik
+id: missing_schema
+theme: bartik
+region: sidebar_first
+weight: 0
+provider: null
+plugin: system_branding_block
+settings:
+  id: system_branding_block
+  label: 'Test missing schema on conditions'
+  provider: system
+  label_display: visible
+  use_site_logo: true
+  use_site_name: true
+  use_site_slogan: true
+visibility:
+  missing_schema:
+    id: missing_schema
+    negate: 0
+    context_mapping: {  }

core/modules/block/tests/fixtures/update/drupal-8.block-test-enabled-missing-schema.php

@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * @file
+ * Partial database to mimic the installation of the block_test module.
+ */
+
+use Drupal\Core\Database\Database;
+use Symfony\Component\Yaml\Yaml;
+
+$connection = Database::getConnection();
+
+// Set the schema version.
+$connection->insert('key_value')
+  ->fields([
+    'collection' => 'system.schema',
+    'name' => 'block_test',
+    'value' => 'i:8000;',
+  ])
+  ->execute();
+
+// Update core.extension.
+$extensions = $connection->select('config')
+  ->fields('config', ['data'])
+  ->condition('collection', '')
+  ->condition('name', 'core.extension')
+  ->execute()
+  ->fetchField();
+$extensions = unserialize($extensions);
+$extensions['module']['block_test'] = 8000;
+$connection->update('config')
+  ->fields([
+    'data' => serialize($extensions),
+  ])
+  ->condition('collection', '')
+  ->condition('name', 'core.extension')
+  ->execute();
+
+// Install the block configuration.
+$config = file_get_contents(__DIR__ . '/block.block.missing_schema.yml');
+$config = Yaml::parse($config);
+$connection->insert('config')
+  ->fields(['data', 'name', 'collection'])
+  ->values([
+    'name' => 'block.block.missing_schema',
+    'data' => serialize($config),
+    'collection' => '',
+  ])
+  ->execute();