diff --git a/tests/framework/db/ColumnSchemaTest.php b/tests/framework/db/ColumnSchemaTest.php
new file mode 100644
index 0000000..1a32a91
--- /dev/null
+++ b/tests/framework/db/ColumnSchemaTest.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yiiunit\framework\db;
+
+
+use yii\db\ColumnSchema;
+use yii\db\Schema;
+use yiiunit\TestCase;
+
+/**
+ * ColumnSchemaTest tests ColumnSchema
+ */
+class ColumnSchemaTest extends TestCase
+{
+    public function testDbTypecastWithEmptyCharType()
+    {
+        $columnSchema = new ColumnSchema(['type' => Schema::TYPE_CHAR]);
+        $this->assertSame('', $columnSchema->dbTypecast(''));
+    }
+}