diff --git a/lib/core/src/test_utils/refund.rs b/lib/core/src/test_utils/refund.rs
index b66b91e02..22ff37e92 100644
--- a/lib/core/src/test_utils/refund.rs
+++ b/lib/core/src/test_utils/refund.rs
@@ -25,7 +25,7 @@ impl RefundHandler<SendSwap> for MockRefundHandler {
         _is_cooperative: bool,
         _fee_rate_msats_per_vbyte: Option<u32>,
     ) -> Result<String, PaymentError> {
-        unimplemented!();
+        Ok("refund-tx-id".to_string())
     }
 
     async fn prepare_refund(
@@ -47,7 +47,7 @@ impl RefundHandler<ChainSwap> for MockRefundHandler {
         _is_cooperative: bool,
         _fee_rate_msats_per_vbyte: Option<u32>,
     ) -> Result<String, PaymentError> {
-        unimplemented!();
+        Ok("refund-tx-id".to_string())
     }
 
     async fn prepare_refund(