diff --git a/cmd/stress/cgr-raterstress/cgr-raterstress.go b/cmd/stress/cgr-raterstress/cgr-raterstress.go
index 58eeaa644..6945c96cd 100644
--- a/cmd/stress/cgr-raterstress/cgr-raterstress.go
+++ b/cmd/stress/cgr-raterstress/cgr-raterstress.go
@@ -20,29 +20,47 @@ package main
 
 import (
 	"flag"
-	"github.com/cgrates/cgrates/engine"
 	"log"
 	"net/rpc"
+	"os"
+	"github.com/cgrates/cgrates/engine"
 	//"net/rpc/jsonrpc"
 	"net/rpc/jsonrpc"
 	"runtime"
+	"runtime/pprof"
 	"time"
 )
 
 var (
-	balancer = flag.String("balancer", "localhost:2012", "balancer server address")
-	runs     = flag.Int("runs", 10000, "stress cycle number")
-	parallel = flag.Int("parallel", 0, "run n requests in parallel")
-	json     = flag.Bool("json", false, "use JSON for RPC encoding")
+	balancer   = flag.String("balancer", "localhost:2012", "balancer server address")
+	runs       = flag.Int("runs", 10000, "stress cycle number")
+	parallel   = flag.Int("parallel", 0, "run n requests in parallel")
+	json       = flag.Bool("json", false, "use JSON for RPC encoding")
+	cpuprofile = flag.String("cpuprofile", "", "write cpu profile to file")
 )
 
 func main() {
 	flag.Parse()
+	if *cpuprofile != "" {
+		f, err := os.Create(*cpuprofile)
+		if err != nil {
+			log.Fatal(err)
+		}
+		pprof.StartCPUProfile(f)
+		defer pprof.StopCPUProfile()
+	}
 	runtime.GOMAXPROCS(runtime.NumCPU())
 
-	t1 := time.Date(2013, time.August, 07, 17, 30, 0, 0, time.UTC)
-	t2 := time.Date(2013, time.August, 07, 18, 30, 0, 0, time.UTC)
-	cd := engine.CallDescriptor{Direction: "*out", TOR: "call", Tenant: "cgrates.org", Subject: "1001", Destination: "+49", TimeStart: t1, TimeEnd: t2}
+	cd := engine.CallDescriptor{
+		TimeStart:    time.Date(2013, time.December, 13, 22, 30, 0, 0, time.UTC),
+		TimeEnd:      time.Date(2013, time.December, 13, 22, 31, 0, 0, time.UTC),
+		CallDuration: 60 * time.Second,
+		Direction:    "*out",
+		TOR:          "call",
+		Tenant:       "cgrates.org",
+		Subject:      "1001",
+		Destination:  "+49",
+	}
 	result := engine.CallCost{}
 	var client *rpc.Client
 	var err error
diff --git a/engine/userbalance_test.go b/engine/userbalance_test.go
index c28729b2d..766820dbe 100644
--- a/engine/userbalance_test.go
+++ b/engine/userbalance_test.go
@@ -1015,7 +1015,7 @@ func TestUserBalanceUnitCountingOutboundInbound(t *testing.T) {
 	}
 }
 
-func TestUserBalanceRefundSimple(t *testing.T) {
+func TestUserBalanceRefund(t *testing.T) {
 	ub := &UserBalance{
 		BalanceMap: map[string]BalanceChain{
 			CREDIT + OUTBOUND: BalanceChain{
@@ -1028,12 +1028,13 @@ func TestUserBalanceRefundSimple(t *testing.T) {
 		},
 	}
 	increments := Increments{
+		&Increment{Cost: 2, BalanceUuids: []string{"", "moneya"}},
 		&Increment{Cost: 2, Duration: 3 * time.Second, BalanceUuids: []string{"minutea", "moneya"}},
 		&Increment{Duration: 4 * time.Second, BalanceUuids: []string{"minuteb", ""}},
 	}
 
 	ub.refundIncrements(increments, OUTBOUND, false)
-	if ub.BalanceMap[CREDIT+OUTBOUND][0].Value != 102 ||
+	if ub.BalanceMap[CREDIT+OUTBOUND][0].Value != 104 ||
 		ub.BalanceMap[MINUTES+OUTBOUND][0].Value != 13 ||
 		ub.BalanceMap[MINUTES+OUTBOUND][1].Value != 14 {
 		t.Error("Error refounding money: ", ub.BalanceMap[MINUTES+OUTBOUND][1].Value)