diff --git a/src/DataMapper/EstPosRequestDataMapper.php b/src/DataMapper/EstPosRequestDataMapper.php
index 7ecef742..a492f52b 100644
--- a/src/DataMapper/EstPosRequestDataMapper.php
+++ b/src/DataMapper/EstPosRequestDataMapper.php
@@ -271,7 +271,7 @@ public function create3DFormDataCommon(AbstractPosAccount $account, $order, stri
             'failUrl'   => $order->fail_url,
             // musteri 3D onay sayfasinda islemleri tamamlamadan kapatirsa, banka bu sayfaya bir istek gonderecek.
             'callbackUrl' => $order->fail_url,
-            'refreshtime' => '10', //callbackUrl sisteminin doğru çalışması için eklenmesi gereken parametre
+            'refreshTime' => '10', //callbackUrl sisteminin doğru çalışması için eklenmesi gereken parametre
             'rnd'       => $order->rand,
             'lang'      => $this->getLang($account, $order),
             'currency'  => $this->mapCurrency($order->currency),
diff --git a/tests/DataMapper/EstPosRequestDataMapperTest.php b/tests/DataMapper/EstPosRequestDataMapperTest.php
index ba33ab96..b1771a9e 100644
--- a/tests/DataMapper/EstPosRequestDataMapperTest.php
+++ b/tests/DataMapper/EstPosRequestDataMapperTest.php
@@ -322,7 +322,7 @@ public function testGet3DFormData()
             'okUrl'     => $this->order['success_url'],
             'failUrl'   => $this->order['fail_url'],
             'callbackUrl' => $this->order['fail_url'],
-            'refreshtime' => '10',
+            'refreshTime' => '10',
             'rnd'       => $this->order['rand'],
             'lang'      => 'tr',
             'currency'  => 949,
@@ -408,7 +408,7 @@ public function testGet3DHostFormData()
             'okUrl'     => $this->order['success_url'],
             'failUrl'   => $this->order['fail_url'],
             'callbackUrl' => $this->order['fail_url'],
-            'refreshtime' => '10',
+            'refreshTime' => '10',
             'rnd'       => $this->order['rand'],
             'lang'      => 'tr',
             'currency'  => '949',
@@ -527,7 +527,7 @@ public static function threeDFormDataProvider(): iterable
                     'okUrl'                           => 'https://domain.com/success',
                     'failUrl'                         => 'https://domain.com/fail_url',
                     'callbackUrl'                     => 'https://domain.com/fail_url',
-                    'refreshtime'                     => '10',
+                    'refreshTime'                     => '10',
                     'rnd'                             => 'rand',
                     'lang'                            => 'tr',
                     'currency'                        => '949',
@@ -570,7 +570,7 @@ public static function threeDFormDataProvider(): iterable
                     'okUrl'                           => 'https://domain.com/success',
                     'failUrl'                         => 'https://domain.com/fail_url',
                     'callbackUrl'                     => 'https://domain.com/fail_url',
-                    'refreshtime'                     => '10',
+                    'refreshTime'                     => '10',
                     'rnd'                             => 'rand',
                     'lang'                            => 'tr',
                     'currency'                        => '949',
diff --git a/tests/DataMapper/EstV3PosRequestDataMapperTest.php b/tests/DataMapper/EstV3PosRequestDataMapperTest.php
index e2784622..313bd006 100644
--- a/tests/DataMapper/EstV3PosRequestDataMapperTest.php
+++ b/tests/DataMapper/EstV3PosRequestDataMapperTest.php
@@ -95,7 +95,7 @@ public function testGet3DFormData()
             'callbackUrl'   => $this->order['fail_url'],
             'rnd'           => $this->order['rand'],
             'hashAlgorithm' => 'ver3',
-            'refreshtime'   => '10',
+            'refreshTime'   => '10',
             'lang'          => 'tr',
             'currency'      => '949',
             'TranType'      => 'Auth',
@@ -168,7 +168,7 @@ public function testGet3DHostFormData()
             'callbackUrl' => $this->order['fail_url'],
             'rnd'       => $this->order['rand'],
             'hashAlgorithm' => 'ver3',
-            'refreshtime' => '10',
+            'refreshTime' => '10',
             'lang'      => 'tr',
             'currency'  => '949',
             'TranType'  => 'Auth',
diff --git a/tests/DataMapper/ResponseDataMapper/EstPosResponseDataMapperTest.php b/tests/DataMapper/ResponseDataMapper/EstPosResponseDataMapperTest.php
index 5650ef21..d95bb086 100644
--- a/tests/DataMapper/ResponseDataMapper/EstPosResponseDataMapperTest.php
+++ b/tests/DataMapper/ResponseDataMapper/EstPosResponseDataMapperTest.php
@@ -736,7 +736,7 @@ public static function threeDHostPaymentDataProvider(): array
                     'firmaadi'                        => 'John Doe',
                     'islemtipi'                       => 'Auth',
                     'campaignOptions'                 => '000001',
-                    'refreshtime'                     => '300',
+                    'refreshTime'                     => '300',
                     'lang'                            => 'tr',
                     'merchantID'                      => '700655000200',
                     'maskedCreditCard'                => '4355 08** **** 4358',
@@ -822,7 +822,7 @@ public static function threeDHostPaymentDataProvider(): array
                     'firmaadi'                        => 'John Doe',
                     'islemtipi'                       => 'Auth',
                     'campaignOptions'                 => '000002',
-                    'refreshtime'                     => '300',
+                    'refreshTime'                     => '300',
                     'lang'                            => 'tr',
                     'merchantID'                      => '700655000200',
                     'maskedCreditCard'                => '4355 08** **** 4358',