diff --git a/dispatchers/core_it_test.go b/dispatchers/core_it_test.go
index a99c283bc..be6032e3c 100644
--- a/dispatchers/core_it_test.go
+++ b/dispatchers/core_it_test.go
@@ -25,6 +25,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/cgrates/cgrates/config"
 	"github.com/cgrates/cgrates/utils"
 )
 
@@ -105,3 +106,84 @@ func testDspCoreLoad(t *testing.T) {
 	}
 
 }
+
+func TestDspCoreSv1StatusNil(t *testing.T) {
+	cgrCfg := config.NewDefaultCGRConfig()
+	dspSrv := NewDispatcherService(nil, cgrCfg, nil, nil)
+	CGREvent := &utils.TenantWithAPIOpts{
+		Tenant: "tenant",
+	}
+	var reply *map[string]interface{}
+	result := dspSrv.CoreSv1Status(CGREvent, reply)
+	expected := "DISPATCHER_ERROR:NOT_FOUND"
+	if result == nil || result.Error() != expected {
+		t.Errorf("\nExpected <%+v>, \nReceived <%+v>", expected, result)
+	}
+}
+
+func TestDspCoreSv1StatusErrorNil(t *testing.T) {
+	cgrCfg := config.NewDefaultCGRConfig()
+	dspSrv := NewDispatcherService(nil, cgrCfg, nil, nil)
+	cgrCfg.DispatcherSCfg().AttributeSConns = []string{"test"}
+	CGREvent := &utils.TenantWithAPIOpts{}
+	var reply *map[string]interface{}
+	result := dspSrv.CoreSv1Status(CGREvent, reply)
+	expected := "MANDATORY_IE_MISSING: [ApiKey]"
+	if result == nil || result.Error() != expected {
+		t.Errorf("\nExpected <%+v>, \nReceived <%+v>", expected, result)
+	}
+}
+
+func TestDspCoreSv1PingNil(t *testing.T) {
+	cgrCfg := config.NewDefaultCGRConfig()
+	dspSrv := NewDispatcherService(nil, cgrCfg, nil, nil)
+	CGREvent := &utils.CGREvent{
+		Tenant: "tenant",
+	}
+	var reply *string
+	result := dspSrv.CoreSv1Ping(CGREvent, reply)
+	expected := "DISPATCHER_ERROR:NOT_FOUND"
+	if result == nil || result.Error() != expected {
+		t.Errorf("\nExpected <%+v>, \nReceived <%+v>", expected, result)
+	}
+}
+
+func TestDspCoreSv1PingErrorNil(t *testing.T) {
+	cgrCfg := config.NewDefaultCGRConfig()
+	dspSrv := NewDispatcherService(nil, cgrCfg, nil, nil)
+	cgrCfg.DispatcherSCfg().AttributeSConns = []string{"test"}
+	CGREvent := &utils.CGREvent{}
+	var reply *string
+	result := dspSrv.CoreSv1Ping(CGREvent, reply)
+	expected := "MANDATORY_IE_MISSING: [ApiKey]"
+	if result == nil || result.Error() != expected {
+		t.Errorf("\nExpected <%+v>, \nReceived <%+v>", expected, result)
+	}
+}
+
+func TestDspCoreSv1SleepNil(t *testing.T) {
+	cgrCfg := config.NewDefaultCGRConfig()
+	dspSrv := NewDispatcherService(nil, cgrCfg, nil, nil)
+	CGREvent := &utils.DurationArgs{
+		Tenant: "tenant",
+	}
+	var reply *string
+	result := dspSrv.CoreSv1Sleep(CGREvent, reply)
+	expected := "DISPATCHER_ERROR:NOT_FOUND"
+	if result == nil || result.Error() != expected {
+		t.Errorf("\nExpected <%+v>, \nReceived <%+v>", expected, result)
+	}
+}
+
+func TestDspCoreSv1SleepErrorNil(t *testing.T) {
+	cgrCfg := config.NewDefaultCGRConfig()
+	dspSrv := NewDispatcherService(nil, cgrCfg, nil, nil)
+	cgrCfg.DispatcherSCfg().AttributeSConns = []string{"test"}
+	CGREvent := &utils.DurationArgs{}
+	var reply *string
+	result := dspSrv.CoreSv1Sleep(CGREvent, reply)
+	expected := "MANDATORY_IE_MISSING: [ApiKey]"
+	if result == nil || result.Error() != expected {
+		t.Errorf("\nExpected <%+v>, \nReceived <%+v>", expected, result)
+	}
+}