diff --git a/tests/unit-tests/reader-activation-sync-woocommerce.php b/tests/unit-tests/reader-activation-sync-woocommerce.php
index cee7fd30dd..bdde9c52f3 100644
--- a/tests/unit-tests/reader-activation-sync-woocommerce.php
+++ b/tests/unit-tests/reader-activation-sync-woocommerce.php
@@ -13,6 +13,14 @@
  * Tests Reader Activation Sync WooCommerce.
  */
 class Newspack_Test_RAS_Sync_WooCommerce extends WP_UnitTestCase {
+
+	/**
+	 * The current order that will be returned in the filter
+	 *
+	 * @var ?WC_Order
+	 */
+	public static $current_order = false;
+
 	const USER_DATA = [
 		'user_login' => 'test_user',
 		'user_email' => 'test@example.com',
@@ -37,6 +45,32 @@ public function set_up() { // phpcs:ignore Squiz.Commenting.FunctionComment.Miss
 		// Reset the user.
 		wp_delete_user( self::$user_id );
 		self::$user_id = wp_insert_user( self::USER_DATA );
+
+		add_filter(
+			'newspack_reader_activation_get_current_product_order_for_sync',
+			[ __CLASS__, 'get_current_order' ]
+		);
+	}
+
+	/**
+	 * Tear down the test.
+	 *
+	 * @return void
+	 */
+	public function tear_down() {
+		remove_filter(
+			'newspack_reader_activation_get_current_product_order_for_sync',
+			[ __CLASS__, 'get_current_order' ]
+		);
+	}
+
+	/**
+	 * Get the current order for the test.
+	 *
+	 * @return ?WC_Order
+	 */
+	public static function get_current_order() {
+		return self::$current_order;
 	}
 
 	/**
@@ -57,13 +91,7 @@ public function test_payment_metadata_basic() {
 			],
 		];
 		$order = \wc_create_order( $order_data );
-
-		add_filter(
-			'newspack_reader_activation_get_current_product_order_for_sync',
-			function() use ( $order ) {
-				return $order;
-			}
-		);
+		self::$current_order = $order;
 
 		$payment_page_url = 'https://example.com/donate';
 		$contact_data = Sync\WooCommerce::get_contact_from_order( $order, $payment_page_url );
@@ -117,14 +145,7 @@ public function test_payment_metadata_utm() {
 			],
 		];
 		$order = \wc_create_order( $order_data );
-
-
-		add_filter(
-			'newspack_reader_activation_get_current_product_order_for_sync',
-			function() use ( $order ) {
-				return $order;
-			}
-		);
+		self::$current_order = $order;
 
 		$contact_data = Sync\WooCommerce::get_contact_from_order( $order );
 		$this->assertEquals( 'test_source', $contact_data['metadata']['payment_page_utm_source'] );
@@ -143,13 +164,7 @@ public function test_payment_metadata_with_failed_order() {
 			]
 		);
 
-
-		add_filter(
-			'newspack_reader_activation_get_current_product_order_for_sync',
-			function() use ( $order ) {
-				return $order;
-			}
-		);
+		self::$current_order = $order;
 
 		$contact_data = Sync\WooCommerce::get_contact_from_order( $order );
 		$this->assertEmpty( $contact_data['metadata']['last_payment_date'] );
@@ -167,12 +182,7 @@ public function test_payment_metadata_from_customer() {
 		];
 		$order = \wc_create_order( $order_data );
 
-		add_filter(
-			'newspack_reader_activation_get_current_product_order_for_sync',
-			function() use ( $order ) {
-				return $order;
-			}
-		);
+		self::$current_order = $order;
 
 		$contact_data = Sync\WooCommerce::get_contact_from_customer( self::$user_id );
 		$this->assertEquals( '$' . $order_data['total'], $contact_data['metadata']['last_payment_amount'] );
@@ -191,12 +201,7 @@ public function test_payment_metadata_from_customer_with_last_order_failed() {
 		];
 		$order = \wc_create_order( $completed_order_data );
 
-		add_filter(
-			'newspack_reader_activation_get_current_product_order_for_sync',
-			function() use ( $order ) {
-				return $order;
-			}
-		);
+		self::$current_order = $order;
 
 		// A more recent, but failed, order.
 		$failed_order_data = [