diff --git a/channeldb/payment_control_test.go b/channeldb/payment_control_test.go
index 5272ec79a..063a2e6f5 100644
--- a/channeldb/payment_control_test.go
+++ b/channeldb/payment_control_test.go
@@ -116,9 +116,18 @@ func TestPaymentControlSwitchFail(t *testing.T) {
 		nil,
 	)
 
-	// Record a new attempt.
+	// Record a new attempt. In this test scenario, the attempt fails.
+	// However, this is not communicated to control tower in the current
+	// implementation. It only registers the initiation of the attempt.
 	attempt.AttemptID = 2
 	err = pControl.RegisterAttempt(info.PaymentHash, attempt)
+	if err != nil {
+		t.Fatalf("unable to register attempt: %v", err)
+	}
+
+	// Record another attempt.
+	attempt.AttemptID = 3
+	err = pControl.RegisterAttempt(info.PaymentHash, attempt)
 	if err != nil {
 		t.Fatalf("unable to send htlc message: %v", err)
 	}
@@ -128,7 +137,7 @@ func TestPaymentControlSwitchFail(t *testing.T) {
 		nil,
 	)
 
-	// Verifies that status was changed to StatusSucceeded.
+	// Settle the attempt and verify that status was changed to StatusSucceeded.
 	var payment *MPPayment
 	payment, err = pControl.Success(info.PaymentHash, preimg)
 	if err != nil {