diff --git a/agents/diam_it_test.go b/agents/diam_it_test.go
index 9db362f09..a3983dfc9 100644
--- a/agents/diam_it_test.go
+++ b/agents/diam_it_test.go
@@ -63,7 +63,7 @@ var sTestsDiam = []func(t *testing.T){
 	testDiamItKillEngine,
 }
 
-//Test start here
+// Test start here
 func TestDiamItTcp(t *testing.T) {
 	diamConfigDIR = "diamagent"
 	for _, stest := range sTestsDiam {
@@ -131,9 +131,6 @@ func testDiamItStartEngine(t *testing.T) {
 }
 
 func testDiamItConnectDiameterClient(t *testing.T) {
-	if diamConfigDIR == "diamsctpagent" || diamConfigDIR == "diamagentmaxconn" {
-		daCfg.DiameterAgentCfg().DictionariesPath = ""
-	}
 	diamClnt, err = NewDiameterClient(daCfg.DiameterAgentCfg().Listen, "INTEGRATION_TESTS",
 		daCfg.DiameterAgentCfg().OriginRealm, daCfg.DiameterAgentCfg().VendorId,
 		daCfg.DiameterAgentCfg().ProductName, utils.DIAMETER_FIRMWARE_REVISION,
diff --git a/agents/diamclient.go b/agents/diamclient.go
index aa83caf28..e3383c3b4 100644
--- a/agents/diamclient.go
+++ b/agents/diamclient.go
@@ -22,6 +22,7 @@ import (
 	"fmt"
 	"net"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/cgrates/cgrates/utils"
@@ -31,6 +32,8 @@ import (
 	"github.com/fiorix/go-diameter/diam/sm"
 )
 
+var dictOnce sync.Once
+
 func NewDiameterClient(addr, originHost, originRealm string, vendorId int, productName string,
 	firmwareRev int, dictsDir string, network string) (*DiameterClient, error) {
 	cfg := &sm.Settings{
@@ -74,7 +77,10 @@ func NewDiameterClient(addr, originHost, originRealm string, vendorId int, produ
 		},
 	}
 	if len(dictsDir) != 0 {
-		if err := loadDictionaries(dictsDir, "DiameterClient"); err != nil {
+		var err error
+		err = nil
+		dictOnce.Do(func() { err = loadDictionaries(dictsDir, "DiameterClient") })
+		if err != nil {
 			return nil, err
 		}
 	}