diff --git a/src/Omnipay/Pacnet/Message/Response.php b/src/Omnipay/Pacnet/Message/Response.php
index be716e6..096ab4a 100644
--- a/src/Omnipay/Pacnet/Message/Response.php
+++ b/src/Omnipay/Pacnet/Message/Response.php
@@ -39,12 +39,9 @@ public function getMessage()
 
     public function getTransactionReference()
     {
-        if (isset($this->data['TemplateNumber'])) {
-            return $this->data['TemplateNumber'];
-        } elseif (isset($this->data['TrackingNumber']) && $this->data['TrackingNumber'] != '') {
-            return $this->data['TrackingNumber'];
-        } else {
-            return null;
-        }
+        return (
+            isset($this->data['TrackingNumber']) &&
+            $this->data['TrackingNumber'] !== ''
+        ) ? $this->data['TrackingNumber'] : null;
     }
 }
diff --git a/tests/Omnipay/Pacnet/Message/RefundRequestTest.php b/tests/Omnipay/Pacnet/Message/RefundRequestTest.php
index 99cffa9..3ed219d 100644
--- a/tests/Omnipay/Pacnet/Message/RefundRequestTest.php
+++ b/tests/Omnipay/Pacnet/Message/RefundRequestTest.php
@@ -16,7 +16,7 @@ public function setUp()
                 'paymentRoutingNumber'  => '987743',
                 'amount'                => '10.00',
                 'currency'              => 'USD',
-                'transactionReference'  => '10000165604'
+                'transactionReference'  => '10000165737'
             )
         );
     }
@@ -89,7 +89,7 @@ public function testEndpoint()
     public function testTransactionReference()
     {
         $data = $this->request->getData();
-        $this->assertSame('10000165604', $data['TemplateNumber']);
+        $this->assertSame('10000165737', $data['TemplateNumber']);
     }
 
     public function testAmount()
@@ -111,7 +111,7 @@ public function testSendSuccess()
 
         $this->assertTrue($response->isSuccessful());
         $this->assertFalse($response->isRedirect());
-        $this->assertEquals('10000165604', $response->getTransactionReference());
+        $this->assertEquals('10000165737', $response->getTransactionReference());
         $this->assertNull($response->getMessage());
         $this->assertNull($response->getCode());
     }
@@ -123,7 +123,7 @@ public function testSendError()
 
         $this->assertFalse($response->isSuccessful());
         $this->assertFalse($response->isRedirect());
-        $this->assertEquals('10000165604', $response->getTransactionReference());
+        $this->assertEquals('10000165737', $response->getTransactionReference());
         $this->assertEquals('Invalid because the original payment is not a settled debit.', $response->getMessage());
         $this->assertEquals('invalid:OriginalPaymentNotSettled', $response->getCode());
     }
diff --git a/tests/Omnipay/Pacnet/Message/ResponseTest.php b/tests/Omnipay/Pacnet/Message/ResponseTest.php
index 5029ca7..feba539 100644
--- a/tests/Omnipay/Pacnet/Message/ResponseTest.php
+++ b/tests/Omnipay/Pacnet/Message/ResponseTest.php
@@ -67,7 +67,7 @@ public function testRefundSuccess()
 
         $this->assertTrue($response->isSuccessful());
         $this->assertFalse($response->isRedirect());
-        $this->assertEquals('10000165604', $response->getTransactionReference());
+        $this->assertEquals('10000165737', $response->getTransactionReference());
         $this->assertNull($response->getMessage());
         $this->assertNull($response->getCode());
     }
@@ -79,7 +79,7 @@ public function testRefundFailure()
 
         $this->assertFalse($response->isSuccessful());
         $this->assertFalse($response->isRedirect());
-        $this->assertEquals('10000165604', $response->getTransactionReference());
+        $this->assertEquals('10000165737', $response->getTransactionReference());
         $this->assertEquals('Invalid because the original payment is not a settled debit.', $response->getMessage());
         $this->assertEquals('invalid:OriginalPaymentNotSettled', $response->getCode());
     }