diff --git a/pkg/ueps/packet_test.go b/pkg/ueps/packet_test.go
index c8d235e..23dff71 100644
--- a/pkg/ueps/packet_test.go
+++ b/pkg/ueps/packet_test.go
@@ -106,12 +106,16 @@ func TestPacket_MarshalAndSign_Good(t *testing.T) {
 func TestPacket_MarshalAndSign_Bad(t *testing.T) {
 	builder := NewBuilder(0x02, []byte("data"))
 
-	frame1, errorA := builder.MarshalAndSign([]byte("secret-a"))
-	frame2, errorB := builder.MarshalAndSign([]byte("secret-b"))
-
-	if errorA != nil || errorB != nil {
-		t.Fatalf("MarshalAndSign errors: %v, %v", errorA, errorB)
+	frame1, err := builder.MarshalAndSign([]byte("secret-a"))
+	if err != nil {
+		t.Fatalf("MarshalAndSign(secret-a) failed: %v", err)
 	}
+
+	frame2, err := builder.MarshalAndSign([]byte("secret-b"))
+	if err != nil {
+		t.Fatalf("MarshalAndSign(secret-b) failed: %v", err)
+	}
+
 	if bytes.Equal(frame1, frame2) {
 		t.Error("expected different frames for different secrets, got identical frames")
 	}