diff --git a/tests/unit/bootstrap.php b/tests/unit/bootstrap.php
index b986ab01ef4..8756d9ecd30 100755
--- a/tests/unit/bootstrap.php
+++ b/tests/unit/bootstrap.php
@@ -60,6 +60,8 @@ function() {
 
 	require $_plugin_dir . 'woocommerce-payments.php';
 
+	require_once __DIR__ . '/helpers/class-wc-helper-site-currency.php';
+
 	require_once $_plugin_dir . 'includes/class-wc-payments-db.php';
 	require_once $_plugin_dir . 'includes/wc-payment-api/models/class-wc-payments-api-charge.php';
 	require_once $_plugin_dir . 'includes/wc-payment-api/models/class-wc-payments-api-abstract-intention.php';