diff --git a/tests/unit/test-class-wc-payment-gateway-wcpay-payment-types.php b/tests/unit/test-class-wc-payment-gateway-wcpay-payment-types.php
index 8caaadb9ea4..c4ae5f729ee 100644
--- a/tests/unit/test-class-wc-payment-gateway-wcpay-payment-types.php
+++ b/tests/unit/test-class-wc-payment-gateway-wcpay-payment-types.php
@@ -9,6 +9,7 @@
 use WCPay\Core\Server\Request\Create_And_Confirm_Intention;
 use WCPay\Constants\Payment_Method;
 use WCPay\Duplicate_Payment_Prevention_Service;
+use WCPay\Duplicates_Detection_Service;
 use WCPay\Session_Rate_Limiter;
 use WCPay\Fraud_Prevention\Fraud_Prevention_Service;
 use WCPay\Payment_Methods\CC_Payment_Method;
@@ -153,6 +154,7 @@ public function set_up() {
 					$mock_dpps,
 					$this->createMock( WC_Payments_Localization_Service::class ),
 					$this->createMock( WC_Payments_Fraud_Service::class ),
+					$this->createMock( Duplicates_Detection_Service::class ),
 				]
 			)
 			->setMethods(
diff --git a/tests/unit/test-class-wc-payment-gateway-wcpay-process-payment.php b/tests/unit/test-class-wc-payment-gateway-wcpay-process-payment.php
index 79f6cd75d9b..3962272376d 100644
--- a/tests/unit/test-class-wc-payment-gateway-wcpay-process-payment.php
+++ b/tests/unit/test-class-wc-payment-gateway-wcpay-process-payment.php
@@ -15,6 +15,7 @@
 use WCPay\Exceptions\Connection_Exception;
 use WCPay\Session_Rate_Limiter;
 use WCPay\Constants\Payment_Method;
+use WCPay\Duplicates_Detection_Service;
 use WCPay\Payment_Methods\CC_Payment_Method;
 
 // Need to use WC_Mock_Data_Store.
@@ -167,6 +168,7 @@ public function set_up() {
 					$this->mock_dpps,
 					$this->createMock( WC_Payments_Localization_Service::class ),
 					$this->createMock( WC_Payments_Fraud_Service::class ),
+					$this->createMock( Duplicates_Detection_Service::class ),
 				]
 			)
 			->setMethods(
diff --git a/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions-payment-method-order-note.php b/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions-payment-method-order-note.php
index 9715d61a193..fd4352ac0b2 100644
--- a/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions-payment-method-order-note.php
+++ b/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions-payment-method-order-note.php
@@ -6,6 +6,7 @@
  */
 
 use WCPay\Duplicate_Payment_Prevention_Service;
+use WCPay\Duplicates_Detection_Service;
 use WCPay\Payment_Methods\CC_Payment_Method;
 use WCPay\Session_Rate_Limiter;
 
@@ -139,7 +140,8 @@ public function set_up() {
 			$this->mock_order_service,
 			$mock_dpps,
 			$this->createMock( WC_Payments_Localization_Service::class ),
-			$this->createMock( WC_Payments_Fraud_Service::class )
+			$this->createMock( WC_Payments_Fraud_Service::class ),
+			$this->createMock( Duplicates_Detection_Service::class ),
 		);
 		$this->wcpay_gateway->init_hooks();
 
diff --git a/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions-process-payment.php b/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions-process-payment.php
index 434bbd971fd..622e7cbe1d9 100644
--- a/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions-process-payment.php
+++ b/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions-process-payment.php
@@ -10,6 +10,7 @@
 use WCPay\Constants\Order_Status;
 use WCPay\Constants\Intent_Status;
 use WCPay\Duplicate_Payment_Prevention_Service;
+use WCPay\Duplicates_Detection_Service;
 use WCPay\Payment_Methods\CC_Payment_Method;
 use WCPay\Session_Rate_Limiter;
 
@@ -160,6 +161,7 @@ public function set_up() {
 					$mock_dpps,
 					$this->createMock( WC_Payments_Localization_Service::class ),
 					$this->createMock( WC_Payments_Fraud_Service::class ),
+					$this->createMock( Duplicates_Detection_Service::class ),
 				]
 			)
 			->setMethods(
diff --git a/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions.php b/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions.php
index a5b33c1581c..4e50568e8b6 100644
--- a/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions.php
+++ b/tests/unit/test-class-wc-payment-gateway-wcpay-subscriptions.php
@@ -8,6 +8,7 @@
 use PHPUnit\Framework\MockObject\MockObject;
 use WCPay\Core\Server\Request\Create_And_Confirm_Intention;
 use WCPay\Duplicate_Payment_Prevention_Service;
+use WCPay\Duplicates_Detection_Service;
 use WCPay\Exceptions\API_Exception;
 use WCPay\Internal\Service\Level3Service;
 use WCPay\Internal\Service\OrderService;
@@ -156,7 +157,8 @@ public function set_up() {
 			$this->order_service,
 			$this->mock_dpps,
 			$this->mock_localization_service,
-			$this->mock_fraud_service
+			$this->mock_fraud_service,
+			$this->createMock( Duplicates_Detection_Service::class ),
 		);
 		$this->wcpay_gateway->init_hooks();
 		WC_Payments::set_gateway( $this->wcpay_gateway );