diff --git a/test/engine.go b/test/engine.go
index f7d8ecb2b7..b092641196 100644
--- a/test/engine.go
+++ b/test/engine.go
@@ -405,8 +405,18 @@ func (e *engine) Println(a ...frontend.Variable) {
 	}
 
 	for i := 0; i < len(a); i++ {
-		v := e.toBigInt(a[i])
-		sbb.WriteString(v.String())
+		if s, ok := a[i].(string); ok {
+			sbb.WriteString(s)
+		} else {
+			v := e.toBigInt(a[i])
+			var vAsNeg big.Int
+			vAsNeg.Sub(v, e.q)
+			if vAsNeg.IsInt64() {
+				sbb.WriteString(strconv.FormatInt(vAsNeg.Int64(), 10))
+			} else {
+				sbb.WriteString(v.String())
+			}
+		}
 		sbb.WriteByte(' ')
 	}
 	fmt.Println(sbb.String())