diff --git a/framework/db/mysql/ColumnSchema.php b/framework/db/mysql/ColumnSchema.php
new file mode 100644
index 0000000000..554308d565
--- /dev/null
+++ b/framework/db/mysql/ColumnSchema.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\db\mysql;
+
+use yii\db\ExpressionInterface;
+use yii\db\JsonExpression;
+
+/**
+ * Class ColumnSchema
+ *
+ * @author Dmytro Naumenko <d.naumenko.a@gmail.com>
+ * @since 2.0.14.1
+ */
+class ColumnSchema extends \yii\db\ColumnSchema
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function dbTypecast($value)
+    {
+        if ($value instanceof ExpressionInterface) {
+            return $value;
+        }
+
+        if ($this->dbType === Schema::TYPE_JSON) {
+            return new JsonExpression($value, $this->type);
+        }
+
+        return $this->typecast($value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function phpTypecast($value)
+    {
+        if ($value === null) {
+            return null;
+        }
+
+        if ($this->type === Schema::TYPE_JSON) {
+            return json_decode($value, true);
+        }
+
+        return parent::phpTypecast($value);
+    }
+}
diff --git a/tests/data/ar/Document.php b/tests/data/ar/Document.php
index e129953a17..1d599baeb6 100644
--- a/tests/data/ar/Document.php
+++ b/tests/data/ar/Document.php
@@ -12,6 +12,7 @@ namespace yiiunit\data\ar;
  * @property string $title
  * @property string $content
  * @property int $version
+ * @property array $document
  */
 class Document extends ActiveRecord
 {
diff --git a/tests/data/mysql.sql b/tests/data/mysql.sql
index 212aa49353..99d40fd64e 100644
--- a/tests/data/mysql.sql
+++ b/tests/data/mysql.sql
@@ -169,6 +169,7 @@ CREATE TABLE `document` (
   `title` VARCHAR(255) NOT NULL,
   `content` TEXT,
   `version` INT(11) NOT NULL DEFAULT 0,
+  `properties` JSON,
   PRIMARY KEY (id)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
diff --git a/tests/data/postgres.sql b/tests/data/postgres.sql
index 36bac6f382..e9b1cd08b0 100644
--- a/tests/data/postgres.sql
+++ b/tests/data/postgres.sql
@@ -178,7 +178,8 @@ CREATE TABLE "document" (
   id serial primary key,
   title varchar(255) not null,
   content text not null,
-  version integer not null default 0
+  version integer not null default 0,
+  properties json
 );
 
 CREATE TABLE "comment" (
diff --git a/tests/framework/ChangeLogTest.php b/tests/framework/ChangeLogTest.php
index bb3b0bdb58..a8e2fac3a3 100644
--- a/tests/framework/ChangeLogTest.php
+++ b/tests/framework/ChangeLogTest.php
@@ -54,6 +54,6 @@ class ChangeLogTest extends TestCase
          * - Description ends without a "."
          * - Line ends with contributor name between "(" and ")".
          */
-        $this->assertRegExp('/- (Bug|Enh|Chg|New)( #\d+(, #\d+)*)?(\s\(CVE-[\d-]+\))?: .*[^.] \(.*\)$', $line);
+        $this->assertRegExp('/- (Bug|Enh|Chg|New)( #\d+(, #\d+)*)?(\s\(CVE-[\d-]+\))?: .*[^.] \(.*\)$/', $line);
     }
 }