diff --git a/routing/router_test.go b/routing/router_test.go
index 42020b7e..d8550ac7 100644
--- a/routing/router_test.go
+++ b/routing/router_test.go
@@ -3025,8 +3025,6 @@ func TestRouterPaymentStateMachine(t *testing.T) {
 			PaymentHash: payHash,
 		}
 
-		copy(preImage[:], bytes.Repeat([]byte{9}, 32))
-
 		router.cfg.SessionSource = &mockPaymentSessionSource{
 			routes: test.routes,
 		}