diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 62c7023..7bdd628 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [ '5.6', '7.0', '7.1','7.2', '7.3', '7.4', '8.0', '8.1' ]
+        php: [ '7.1','7.2', '7.3', '7.4', '8.0', '8.1' ]
         stability: [ prefer-stable ]
 
     name: PHP ${{ matrix.php }} - ${{ matrix.stability }}
diff --git a/src/Item.php b/src/Item.php
index 8fa66c0..e2837d2 100644
--- a/src/Item.php
+++ b/src/Item.php
@@ -6,6 +6,17 @@
 
 class Item extends BaseItem
 {
+    public function __toString()
+    {
+        return sprintf(
+            '#%s %d %s x %u',
+            $this->getName(),
+            $this->getPrice(),
+            $this->getCurrency(),
+            $this->getQuantity()
+        );
+    }
+
     public function getCurrency()
     {
         return $this->getParameter('currency') ?: 'TWD';
@@ -25,15 +36,4 @@ public function setUrl($value)
     {
         return $this->setParameter('url', $value);
     }
-
-    public function __toString()
-    {
-        return sprintf(
-            '#%s %d %s x %u',
-            $this->getName(),
-            $this->getPrice(),
-            $this->getCurrency(),
-            $this->getQuantity()
-        );
-    }
 }
diff --git a/src/Message/AcceptNotificationRequest.php b/src/Message/AcceptNotificationRequest.php
index 02465c1..b443044 100644
--- a/src/Message/AcceptNotificationRequest.php
+++ b/src/Message/AcceptNotificationRequest.php
@@ -2,7 +2,9 @@
 
 namespace Omnipay\ECPay\Message;
 
-class AcceptNotificationRequest extends CompletePurchaseRequest
+use Omnipay\Common\Message\NotificationInterface;
+
+class AcceptNotificationRequest extends CompletePurchaseRequest implements NotificationInterface
 {
     /**
      * @param array $data
@@ -12,4 +14,27 @@ public function sendData($data)
     {
         return $this->response = new AcceptNotificationResponse($this, $data);
     }
+
+    public function getTransactionStatus()
+    {
+        return $this->getNotificationResponse()->getTransactionStatus();
+    }
+
+    public function getMessage()
+    {
+        return $this->getNotificationResponse()->getMessage();
+    }
+
+    public function getReply()
+    {
+        return $this->getNotificationResponse()->getReply();
+    }
+
+    /**
+     * @return AcceptNotificationResponse
+     */
+    private function getNotificationResponse()
+    {
+        return ! $this->response ? $this->send() : $this->response;
+    }
 }
diff --git a/src/Message/AcceptNotificationResponse.php b/src/Message/AcceptNotificationResponse.php
index 0e3eda2..51f0c86 100644
--- a/src/Message/AcceptNotificationResponse.php
+++ b/src/Message/AcceptNotificationResponse.php
@@ -2,14 +2,16 @@
 
 namespace Omnipay\ECPay\Message;
 
-class AcceptNotificationResponse extends CompletePurchaseResponse
+use Omnipay\Common\Message\NotificationInterface;
+
+class AcceptNotificationResponse extends CompletePurchaseResponse implements NotificationInterface
 {
-    /**
-     * Response Message.
-     *
-     * @return null|string A response message from the payment gateway
-     */
-    public function getMessage()
+    public function getTransactionStatus()
+    {
+        return $this->isSuccessful() ? self::STATUS_COMPLETED : self::STATUS_FAILED;
+    }
+
+    public function getReply()
     {
         return '1|OK';
     }
diff --git a/src/Message/CompletePurchaseRequest.php b/src/Message/CompletePurchaseRequest.php
index 9863e31..292f5c9 100644
--- a/src/Message/CompletePurchaseRequest.php
+++ b/src/Message/CompletePurchaseRequest.php
@@ -7,15 +7,13 @@
 use Omnipay\Common\Exception\InvalidRequestException;
 use Omnipay\Common\Exception\InvalidResponseException;
 use Omnipay\Common\Message\AbstractRequest;
-use Omnipay\Common\Message\NotificationInterface;
-use Omnipay\Common\Message\ResponseInterface;
 use Omnipay\ECPay\Traits\HasCustomFields;
 use Omnipay\ECPay\Traits\HasDefaults;
 use Omnipay\ECPay\Traits\HasECPay;
 use Omnipay\ECPay\Traits\HasMerchantTradeNo;
 use Omnipay\ECPay\Traits\HasStoreID;
 
-class CompletePurchaseRequest extends AbstractRequest implements NotificationInterface
+class CompletePurchaseRequest extends AbstractRequest
 {
     use HasECPay;
     use HasDefaults;
@@ -239,25 +237,6 @@ public function sendData($data)
         return $this->response = new CompletePurchaseResponse($this, $data);
     }
 
-    public function getTransactionStatus()
-    {
-        return $this->getNotification()->getTransactionStatus();
-    }
-
-    public function getMessage()
-    {
-        return $this->getNotification()->getMessage();
-    }
-
-    /**
-     * @return ResponseInterface
-     * @throws InvalidResponseException
-     */
-    private function getNotification()
-    {
-        return ! $this->response ? $this->send() : $this->response;
-    }
-
     /**
      * @param array $data
      * @return array
diff --git a/src/Message/CompletePurchaseResponse.php b/src/Message/CompletePurchaseResponse.php
index aeed035..923f0e8 100644
--- a/src/Message/CompletePurchaseResponse.php
+++ b/src/Message/CompletePurchaseResponse.php
@@ -2,9 +2,7 @@
 
 namespace Omnipay\ECPay\Message;
 
-use Omnipay\Common\Message\NotificationInterface;
-
-class CompletePurchaseResponse extends AbstractResponse implements NotificationInterface
+class CompletePurchaseResponse extends AbstractResponse
 {
     public function isSuccessful()
     {
@@ -20,9 +18,4 @@ public function getMessage()
     {
         return $this->data['RtnMsg'];
     }
-
-    public function getTransactionStatus()
-    {
-        return $this->isSuccessful() ? self::STATUS_COMPLETED : self::STATUS_FAILED;
-    }
 }
diff --git a/tests/GatewayTest.php b/tests/GatewayTest.php
index c84bb13..39b406a 100644
--- a/tests/GatewayTest.php
+++ b/tests/GatewayTest.php
@@ -90,7 +90,8 @@ public function testAcceptNotification()
         ]))->send();
 
         self::assertTrue($response->isSuccessful());
-        self::assertEquals('1|OK', $response->getMessage());
+        self::assertEquals('Succeeded', $response->getMessage());
+        self::assertEquals('1|OK', $response->getReply());
     }
 
     public function testFetchTransaction()
diff --git a/tests/Message/AcceptNotificationRequestTest.php b/tests/Message/AcceptNotificationRequestTest.php
index c50f0da..5c1e35d 100644
--- a/tests/Message/AcceptNotificationRequestTest.php
+++ b/tests/Message/AcceptNotificationRequestTest.php
@@ -62,7 +62,8 @@ public function testSendData($results)
         self::assertEquals($options['MerchantTradeNo'], $notification->getTransactionId());
         self::assertEquals($options['TradeNo'], $notification->getTransactionReference());
         self::assertEquals(NotificationInterface::STATUS_COMPLETED, $notification->getTransactionStatus());
-        self::assertEquals('1|OK', $notification->getMessage());
+        self::assertEquals('Succeeded', $notification->getMessage());
+        self::assertEquals('1|OK', $notification->getReply());
     }
 
     public function testInvalidCheckMacValue()