diff --git a/utils/cgrrecordwriter.go b/utils/cgrrecordwriter.go
index 0a01552c4..3bb083a8c 100644
--- a/utils/cgrrecordwriter.go
+++ b/utils/cgrrecordwriter.go
@@ -22,7 +22,7 @@ import (
 	"io"
 )
 
-// Writer for one line, compatible with csv.Writer interface on Write
+// CgrRecordWriter is a writer for one line, compatible with csv.Writer interface on Write
 // Used in TP exporter
 type CgrRecordWriter interface {
 	Write([]string) error
@@ -39,6 +39,7 @@ type CgrIORecordWriter struct {
 	w io.Writer
 }
 
+// Write into the Writer the record
 func (rw *CgrIORecordWriter) Write(record []string) error {
 	for _, fld := range append(record, "\n") { // Postpend the new line char and write record in the writer
 		if _, err := io.WriteString(rw.w, fld); err != nil {
@@ -48,6 +49,7 @@ func (rw *CgrIORecordWriter) Write(record []string) error {
 	return nil
 }
 
+// Flush only to implement CgrRecordWriter
 // ToDo: make sure we properly handle this method
 func (*CgrIORecordWriter) Flush() {
 	return
diff --git a/utils/coreutils.go b/utils/coreutils.go
index 450404daa..f5f1fe242 100644
--- a/utils/coreutils.go
+++ b/utils/coreutils.go
@@ -69,10 +69,13 @@ func init() {
 	startCGRateSTime = time.Now()
 }
 
+/*
 func GetTimeElapsedFromStart() string {
 	return time.Now().Sub(startCGRateSTime).Round(time.Second).String()
 }
+*/
 
+// GetStartTime return the Start time of engine (in UNIX format)
 func GetStartTime() string {
 	return startCGRateSTime.Format(time.UnixDate)
 }
@@ -112,7 +115,7 @@ func FirstNonEmpty(vals ...string) string {
 			return val
 		}
 	}
-	return ""
+	return EmptyString
 }
 
 func Sha1(attrs ...string) string {
diff --git a/utils/coreutils_test.go b/utils/coreutils_test.go
index 3657d9d1b..98015d949 100644
--- a/utils/coreutils_test.go
+++ b/utils/coreutils_test.go
@@ -25,7 +25,22 @@ import (
 	"time"
 )
 
+func TestGetStartTime(t *testing.T) {
+	startCGRateSTime = time.Date(2020, time.April, 18, 23, 0, 0, 0, time.UTC)
+	eOut := startCGRateSTime.Format(time.UnixDate)
+	rcv := GetStartTime()
+	if !reflect.DeepEqual(eOut, rcv) {
+		t.Errorf("Expecting: %+v, received: %+v", eOut, rcv)
+	}
+}
+
 func TestFirstNonEmpty(t *testing.T) {
+	//only check with an empty string
+	rcv := FirstNonEmpty(EmptyString)
+	if rcv != EmptyString {
+		t.Errorf("Expecting an empty string, received: %+v", rcv)
+	}
+	//normal check
 	firstElmnt := ""
 	sampleMap := make(map[string]string)
 	sampleMap["Third"] = "third"