diff --git a/tests/Valitron/StaticVsInstanceTest.php b/tests/Valitron/StaticVsInstanceTest.php
index c83dad4..38a2851 100644
--- a/tests/Valitron/StaticVsInstanceTest.php
+++ b/tests/Valitron/StaticVsInstanceTest.php
@@ -10,4 +10,26 @@ class StaticVsInstanceTest extends BaseTestCase
 		$this->assertEquals('ar', Validator::lang(),
 							'instance defined lang should not replace static global lang');
 	}
+
+	/**
+	 * Rules messages added with Validator::addRule are replaced after creating validator instance
+	 */
+	public function testRuleMessagesReplacedAfterConstructor()
+	{
+		$customMessage = 'custom message';
+		$ruleName = 'foo';
+		Validator::addRule($ruleName, function() {}, $customMessage);
+
+		$prop = new ReflectionProperty('Valitron\Validator', '_ruleMessages');
+		$prop->setAccessible(true);
+		$messages = $prop->getValue();
+
+		$this->assertEquals($customMessage, $messages[$ruleName]);
+
+		new Validator(array(), array());
+
+		$messages = $prop->getValue();
+		$this->assertArrayHasKey($ruleName, $messages);
+		$this->assertEquals($customMessage, $messages[$ruleName]);
+	}
 }