diff --git a/general_tests/libtest.go b/general_tests/libtest.go
index de11c0d2b..b5668f29a 100644
--- a/general_tests/libtest.go
+++ b/general_tests/libtest.go
@@ -19,7 +19,7 @@ package general_tests
 
 import (
 	"errors"
-	"flag"
+	//"flag"
 	"net/rpc"
 	"net/rpc/jsonrpc"
 
@@ -28,14 +28,17 @@ import (
 )
 
 var (
-	dataDir   = flag.String("data_dir", "/usr/share/cgrates", "CGR data dir path here")
-	waitRater = flag.Int("wait_rater", 100, "Number of miliseconds to wait for rater to start and cache")
-	encoding  = flag.String("rpc", utils.MetaJSON, "what encoding whould be uused for rpc comunication")
-	err       error
+	//dataDir   = flag.String("data_dir", "/usr/share/cgrates", "CGR data dir path here")
+	//waitRater = flag.Int("wait_rater", 100, "Number of miliseconds to wait for rater to start and cache")
+	waitRater = 100
+	//encoding  = flag.String("rpc", utils.MetaJSON, "what encoding whould be uused for rpc comunication")
+	encoding = utils.MetaJSON
+	err      error
+	dataDir  = "/usr/share/cgrates"
 )
 
 func newRPCClient(cfg *config.ListenCfg) (c *rpc.Client, err error) {
-	switch *encoding {
+	switch encoding {
 	case utils.MetaJSON:
 		return jsonrpc.Dial(utils.TCP, cfg.RPCJSONListen)
 	case utils.MetaGOB:
diff --git a/general_tests/sessions_concur_test.go b/general_tests/sessions_concur_test.go
index 48b056c3d..96b32c5fc 100644
--- a/general_tests/sessions_concur_test.go
+++ b/general_tests/sessions_concur_test.go
@@ -29,7 +29,7 @@ import (
 	"time"
 
 	"github.com/cgrates/cgrates/apier/v1"
-	 "github.com/cgrates/cgrates/apier/v2"
+	"github.com/cgrates/cgrates/apier/v2"
 	"github.com/cgrates/cgrates/config"
 	"github.com/cgrates/cgrates/engine"
 	"github.com/cgrates/cgrates/sessions"
@@ -45,13 +45,15 @@ var (
 	sCncrCps      = flag.Int("cps", 50000, "maximum requests per second sent out")
 
 	cpsPool = make(chan struct{}, *sCncrCps)
+	acntIDs = make(chan string, 1)
+	wg      sync.WaitGroup
 )
 
 // Tests starting here
 func TestSCncrInternal(t *testing.T) {
 	sCncrCfgDIR = "sessinternal"
 	for _, tst := range sTestsSCncrIT {
-		t.Run(sCncrCfgDIR, tst)
+		t.Run("InternalConn", tst)
 	}
 }
 
@@ -59,7 +61,7 @@ func TestSCncrInternal(t *testing.T) {
 func TestSCncrJSON(t *testing.T) {
 	sCncrCfgDIR = "sessintjson"
 	for _, tst := range sTestsSCncrIT {
-		t.Run(sCncrCfgDIR, tst)
+		t.Run("JSONConn", tst)
 	}
 }
 
@@ -76,7 +78,7 @@ var sTestsSCncrIT = []func(t *testing.T){
 }
 
 func testSCncrInitConfig(t *testing.T) {
-	sCncrCfgPath = path.Join(*dataDir, "conf", "samples", sCncrCfgDIR)
+	sCncrCfgPath = path.Join(dataDir, "conf", "samples", sCncrCfgDIR)
 	if sCncrCfg, err = config.NewCGRConfigFromPath(sCncrCfgPath); err != nil {
 		t.Fatal(err)
 	}
@@ -96,7 +98,7 @@ func testSCncrInitStorDB(t *testing.T) {
 }
 
 func testSCncrStartEngine(t *testing.T) {
-	if _, err := engine.StopStartEngine(sCncrCfgPath, *waitRater); err != nil {
+	if _, err := engine.StopStartEngine(sCncrCfgPath, waitRater); err != nil {
 		t.Fatal(err)
 	}
 }
@@ -111,7 +113,7 @@ func testSCncrRPCConn(t *testing.T) {
 }
 
 func testSCncrKillEngine(t *testing.T) {
-	if err := engine.KillEngine(*waitRater); err != nil {
+	if err := engine.KillEngine(waitRater); err != nil {
 		t.Error(err)
 	}
 }
@@ -120,14 +122,14 @@ func testSCncrLoadTP(t *testing.T) {
 	var loadInst string
 	if err := sCncrRPC.Call(utils.ApierV1LoadTariffPlanFromFolder,
 		&utils.AttrLoadTpFromFolder{FolderPath: path.Join(
-			*dataDir, "tariffplans", "tp1cnt")}, &loadInst); err != nil {
+			dataDir, "tariffplans", "tp1cnt")}, &loadInst); err != nil {
 		t.Error(err)
 	}
 	attrPrfl := &v2.AttributeWithCache{
 		ExternalAttributeProfile: &engine.ExternalAttributeProfile{
-			Tenant:    "cgrates.org",
-			ID:        "AttrConcurrentSessions",
-			Contexts:  []string{utils.ANY},
+			Tenant:   "cgrates.org",
+			ID:       "AttrConcurrentSessions",
+			Contexts: []string{utils.ANY},
 			Attributes: []*engine.ExternalAttribute{
 				{
 					FieldName: "TestType",
@@ -146,12 +148,11 @@ func testSCncrLoadTP(t *testing.T) {
 }
 
 func testSCncrRunSessions(t *testing.T) {
-	acntIDs := utils.NewStringSet(nil)
+	acntIDsSet := utils.NewStringSet(nil)
 	bufferTopup := time.Duration(8760) * time.Hour
-	var wg sync.WaitGroup
 	for i := 0; i < *sCncrSessions; i++ {
 		acntID := fmt.Sprintf("100%d", utils.RandomInteger(100, 200))
-		if !acntIDs.Has(acntID) {
+		if !acntIDsSet.Has(acntID) {
 			// Special balance BUFFER to cover concurrency on MAIN one
 			argsAddBalance := &v1.AttrAddBalance{
 				Tenant:      "cgrates.org",
@@ -168,24 +169,14 @@ func testSCncrRunSessions(t *testing.T) {
 			} else if addBlcRply != utils.OK {
 				t.Errorf("received: <%s>", addBlcRply)
 			}
-			acntIDs.Add(acntID)
+			acntIDsSet.Add(acntID)
 		}
+		acntIDs <- acntID
 		wg.Add(1)
-		go func(acntID string) {
-			cpsPool <- struct{}{} // push here up to cps
-			go func() {           // allow more requests after a second
-				time.Sleep(time.Duration(time.Second))
-				<-cpsPool
-			}()
-			err := runSession(acntID)
-			wg.Done()
-			if err != nil {
-				t.Error(err)
-			}
-		}(acntID)
+		go t.Run(fmt.Sprintf("RunSession#%d", i), testRunSession)
 	}
 	wg.Wait()
-	for acntID := range acntIDs.Data() {
+	for acntID := range acntIDsSet.Data() {
 		// make sure the account was properly refunded
 		var acnt *engine.Account
 		acntAttrs := &utils.AttrGetAccount{
@@ -202,9 +193,15 @@ func testSCncrRunSessions(t *testing.T) {
 }
 
 // runSession runs one session
-func runSession(acntID string) (err error) {
+func testRunSession(t *testing.T) {
+	defer wg.Done()       // decrease group counter one out from test
+	cpsPool <- struct{}{} // push here up to cps
+	go func() {           // allow more requests after a second
+		time.Sleep(time.Duration(time.Second))
+		<-cpsPool
+	}()
+	acntID := <-acntIDs
 	originID := utils.GenUUID() // each test with it's own OriginID
-
 	// topup as much as we know we need for one session
 	mainTopup := time.Duration(90) * time.Second
 	var addBlcRply string
@@ -219,9 +216,9 @@ func runSession(acntID string) (err error) {
 		},
 	}
 	if err = sCncrRPC.Call(utils.ApierV1AddBalance, argsAddBalance, &addBlcRply); err != nil {
-		return
+		t.Error(err)
 	} else if addBlcRply != utils.OK {
-		return fmt.Errorf("received: <%s> to ApierV1.AddBalance", addBlcRply)
+		t.Errorf("received: <%s> to ApierV1.AddBalance", addBlcRply)
 	}
 	time.Sleep(time.Duration(
 		utils.RandomInteger(0, 100)) * time.Millisecond) // randomize between tests
@@ -246,7 +243,7 @@ func runSession(acntID string) (err error) {
 	}
 	var rplyAuth sessions.V1AuthorizeReply
 	if err := sCncrRPC.Call(utils.SessionSv1AuthorizeEvent, authArgs, &rplyAuth); err != nil {
-		return err
+		t.Error(err)
 	}
 	time.Sleep(time.Duration(
 		utils.RandomInteger(0, 100)) * time.Millisecond)
@@ -254,8 +251,8 @@ func runSession(acntID string) (err error) {
 	// Init the session
 	initUsage := 1 * time.Minute
 	initArgs := &sessions.V1InitSessionArgs{
-		InitSession: true,
-		GetAttributes:     true,
+		InitSession:   true,
+		GetAttributes: true,
 		CGREvent: &utils.CGREvent{
 			Tenant: "cgrates.org",
 			ID:     fmt.Sprintf("TestSCncrInit%s", originID),
@@ -272,9 +269,9 @@ func runSession(acntID string) (err error) {
 	var rplyInit sessions.V1InitSessionReply
 	if err := sCncrRPC.Call(utils.SessionSv1InitiateSession,
 		initArgs, &rplyInit); err != nil {
-		return err
+		t.Error(err)
 	} else if rplyInit.MaxUsage == 0 {
-		return fmt.Errorf("unexpected MaxUsage at init: %v", rplyInit.MaxUsage)
+		t.Errorf("unexpected MaxUsage at init: %v", rplyInit.MaxUsage)
 	}
 	time.Sleep(time.Duration(
 		utils.RandomInteger(0, 100)) * time.Millisecond)
@@ -297,11 +294,11 @@ func runSession(acntID string) (err error) {
 		},
 	}
 	var rplyUpdt sessions.V1UpdateSessionReply
-	if err = sCncrRPC.Call(utils.SessionSv1UpdateSession,
+	if err := sCncrRPC.Call(utils.SessionSv1UpdateSession,
 		updtArgs, &rplyUpdt); err != nil {
-		return
+		t.Error(err)
 	} else if rplyUpdt.MaxUsage == 0 {
-		return fmt.Errorf("unexpected MaxUsage at update: %v", rplyUpdt.MaxUsage)
+		t.Errorf("unexpected MaxUsage at update: %v", rplyUpdt.MaxUsage)
 	}
 	time.Sleep(time.Duration(
 		utils.RandomInteger(0, 100)) * time.Millisecond)
@@ -319,11 +316,11 @@ func runSession(acntID string) (err error) {
 		},
 	}
 	var rplyTrmnt string
-	if err = sCncrRPC.Call(utils.SessionSv1TerminateSession,
+	if err := sCncrRPC.Call(utils.SessionSv1TerminateSession,
 		trmntArgs, &rplyTrmnt); err != nil {
-		return
+		t.Error(err)
 	} else if rplyTrmnt != utils.OK {
-		return fmt.Errorf("received: <%s> to SessionSv1.Terminate", rplyTrmnt)
+		t.Errorf("received: <%s> to SessionSv1.Terminate", rplyTrmnt)
 	}
 	time.Sleep(time.Duration(
 		utils.RandomInteger(0, 100)) * time.Millisecond)
@@ -339,21 +336,20 @@ func runSession(acntID string) (err error) {
 		},
 	}
 	var rplyCDR string
-	if err = sCncrRPC.Call(utils.SessionSv1ProcessCDR,
+	if err := sCncrRPC.Call(utils.SessionSv1ProcessCDR,
 		argsCDR, &rplyCDR); err != nil {
-		return
+		t.Error(err)
 	} else if rplyCDR != utils.OK {
-		return fmt.Errorf("received: <%s> to ProcessCDR", rplyCDR)
+		t.Errorf("received: <%s> to ProcessCDR", rplyCDR)
 	}
 	time.Sleep(time.Duration(20) * time.Millisecond)
 	var cdrs []*engine.ExternalCDR
 	argCDRs := utils.RPCCDRsFilter{OriginIDs: []string{originID}}
-	if err = sCncrRPC.Call(utils.ApierV2GetCDRs, argCDRs, &cdrs); err != nil {
-		return
+	if err := sCncrRPC.Call(utils.ApierV2GetCDRs, argCDRs, &cdrs); err != nil {
+		t.Error(err)
 	} else if len(cdrs) != 1 {
-		return fmt.Errorf("unexpected number of CDRs returned: %d", len(cdrs))
-	} else if cdrs[0].Usage != "1m30s" {
-		return fmt.Errorf("unexpected usage of CDR: %+v", cdrs[0])
+		t.Errorf("unexpected number of CDRs returned: %d", len(cdrs))
+	} else if cdrs[0].Usage != "2m30s" {
+		t.Errorf("unexpected usage of CDR: %+v", cdrs[0])
 	}
-	return
 }
diff --git a/sessions/sessions.go b/sessions/sessions.go
index 9a9fe42ac..f5c9fa7ea 100644
--- a/sessions/sessions.go
+++ b/sessions/sessions.go
@@ -2974,7 +2974,7 @@ func (sS *SessionS) BiRPCv1ProcessEvent(clnt rpcclient.ClientConnector,
 		rplyAttr, err := sS.processAttributes(args.CGREvent, args.ArgDispatcher,
 			argsFlagsWithParams.ParamsSlice(utils.MetaAttributes))
 		if err == nil {
-			args.CGREvent = rplyAttr.CGREvent
+			args.CGREvent = rplyAttr.CGREvent.Clone()
 			if tntIface, has := args.CGREvent.Event[utils.MetaTenant]; has {
 				// special case when we want to overwrite the tenant
 				args.CGREvent.Tenant = tntIface.(string)