diff --git a/utils/coreutils.go b/utils/coreutils.go
index c05d73dda..ce14ff570 100644
--- a/utils/coreutils.go
+++ b/utils/coreutils.go
@@ -966,11 +966,8 @@ func AESDecrypt(encrypted string, encKey string) (txt string, err error) {
 	nonceSize := aesGCM.NonceSize()
 	nonce, ciphertext := enc[:nonceSize], enc[nonceSize:]
 	var plaintext []byte
-	if plaintext, err = aesGCM.Open(nil, nonce, ciphertext, nil); err != nil {
-		return
-	}
-
-	return fmt.Sprintf("%s", plaintext), nil
+	plaintext, err = aesGCM.Open(nil, nonce, ciphertext, nil)
+	return string(plaintext), err
 }
 
 // Hash generates the hash text
diff --git a/utils/file.go b/utils/file.go
index 0c56f1835..573beb3be 100644
--- a/utils/file.go
+++ b/utils/file.go
@@ -26,8 +26,7 @@ import (
 
 // WatchDir sets up a watcher via inotify to be triggered on new files
 // sysID is the subsystem ID, f will be triggered on match
-func WatchDir(dirPath string, f func(itmPath, itmID string) error,
-	sysID string, stopWatching chan struct{}) (err error) {
+func WatchDir(dirPath string, f func(itmPath, itmID string) error, sysID string, stopWatching chan struct{}) (err error) {
 	var watcher *fsnotify.Watcher
 	if watcher, err = fsnotify.NewWatcher(); err != nil {
 		return
diff --git a/utils/file_it_test.go b/utils/file_it_test.go
new file mode 100644
index 000000000..925cabff2
--- /dev/null
+++ b/utils/file_it_test.go
@@ -0,0 +1,62 @@
+/*
+Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
+Copyright (C) ITsysCOM GmbH
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>
+*/
+
+package utils
+
+import (
+	"os"
+	"testing"
+)
+
+var (
+	testsWatchDir = []func(t *testing.T){
+		testWatchDir,
+		testWatchDirNoError,
+	}
+)
+
+func TestFileIT(t *testing.T) {
+	for _, test := range testsWatchDir {
+		t.Run("Watch_Dir_Tests", test)
+	}
+}
+
+func testWatchDir(t *testing.T) {
+	stopWatching := make(chan struct{}, 1)
+	close(stopWatching)
+	flPath := "/tmp/testWatchDir"
+	if err := os.MkdirAll(flPath, 0777); err != nil {
+		t.Error(err)
+	}
+	if err := WatchDir(flPath, nil, "randomID", stopWatching); err != nil {
+		t.Error(err)
+	}
+
+	if err := os.RemoveAll(flPath); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func testWatchDirNoError(t *testing.T) {
+	stopWatching := make(chan struct{}, 1)
+	flPath := "/tmp/inexistentDir"
+	expectedErr := "no such file or directory"
+	if err := WatchDir(flPath, nil, "randomID", stopWatching); err == nil || err.Error() != expectedErr {
+		t.Errorf("Expected %+v, received %+v", expectedErr, err)
+	}
+}
diff --git a/utils/logger.go b/utils/logger.go
index f769ebc2b..0d340eedc 100644
--- a/utils/logger.go
+++ b/utils/logger.go
@@ -31,10 +31,7 @@ var nodeID string
 
 func init() {
 	if Logger == nil || reflect.ValueOf(Logger).IsNil() {
-		err := Newlogger(MetaSysLog, nodeID)
-		if err != nil {
-			Logger.Err(fmt.Sprintf("Could not connect to syslog: %v", err))
-		}
+		Newlogger(MetaSysLog, nodeID)
 	}
 }
 
@@ -44,12 +41,9 @@ func Newlogger(loggertype, id string) (err error) {
 	nodeID = id
 	var l *syslog.Writer
 	if loggertype == MetaSysLog {
-		if l, err = syslog.New(syslog.LOG_INFO|syslog.LOG_DAEMON, fmt.Sprintf("CGRateS <%s> ", nodeID)); err != nil {
-			return err
-		} else {
-			Logger.SetSyslog(l)
-		}
-		return nil
+		l, err = syslog.New(syslog.LOG_INFO|syslog.LOG_DAEMON, fmt.Sprintf("CGRateS <%s> ", nodeID))
+		Logger.SetSyslog(l) // if we received an error, l is nil
+		return err
 	} else if loggertype != MetaStdLog {
 		return fmt.Errorf("unsuported logger: <%s>", loggertype)
 	}
@@ -92,7 +86,7 @@ type StdLogger struct {
 
 func (sl *StdLogger) Close() (err error) {
 	if sl.syslog != nil {
-		sl.Close()
+		err = sl.syslog.Close()
 	}
 	return
 }
diff --git a/utils/logger_it_test.go b/utils/logger_it_test.go
new file mode 100644
index 000000000..6b44fe45a
--- /dev/null
+++ b/utils/logger_it_test.go
@@ -0,0 +1,350 @@
+package utils
+
+import (
+	"bytes"
+	"log/syslog"
+	"net"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+var (
+	testsSyslogLogger = []func(t *testing.T){
+		testEmergencyLogger,
+		testAlertLogger,
+		testCriticalLogger,
+		testErrorLogger,
+		testWarningLogger,
+		testNoticeLogger,
+		testInfoLogger,
+		testDebugLogger,
+	}
+)
+
+type unixServer struct {
+	l    net.Listener
+	buf  *bytes.Buffer
+	path string
+}
+
+func newUnixServer(path string) (*unixServer, error) {
+	l, err := net.Listen("unix", path)
+	if err != nil {
+		return nil, err
+	}
+	return &unixServer{
+		l:    l,
+		buf:  new(bytes.Buffer),
+		path: path,
+	}, nil
+}
+
+func (u *unixServer) Close() error {
+	return u.l.Close()
+}
+
+func (u *unixServer) serveConn(c net.Conn) error {
+	for {
+		buf := make([]byte, 512)
+		nr, err := c.Read(buf)
+		if err != nil {
+			return err
+		}
+
+		_, err = u.buf.Write(buf[0:nr])
+		if err != nil {
+			return err
+		}
+	}
+}
+
+func (u *unixServer) Serve() error {
+	for {
+		fd, err := u.l.Accept()
+		if err != nil {
+			return err
+		}
+
+		go u.serveConn(fd)
+	}
+}
+
+func (u *unixServer) String() string {
+	return u.buf.String()
+}
+
+func TestLoggerSyslog(t *testing.T) {
+	for _, test := range testsSyslogLogger {
+		t.Run("Syslog_logger", test)
+	}
+}
+
+func testEmergencyLogger(t *testing.T) {
+	flPath := "/tmp/testEmergency2"
+
+	l, err := newUnixServer(flPath)
+	if err != nil {
+		t.Error(err)
+	}
+	go l.Serve()
+
+	writer, err := syslog.Dial("unix", flPath, syslog.LOG_EMERG, "id_emergency")
+	if err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+	newLogger.SetSyslog(writer)
+
+	if err := newLogger.Emerg("emergency_panic"); err != nil {
+		t.Error(err)
+	}
+	runtime.Gosched()
+	if err := writer.Close(); err != nil {
+		t.Error(err)
+	}
+	if err := l.Close(); err != nil {
+		t.Error(err)
+	}
+	expected := "emergency_panic"
+	if rcv := l.String(); !strings.Contains(rcv, expected) {
+		t.Errorf("Expected %q, received %q", expected, rcv)
+	}
+}
+
+func testAlertLogger(t *testing.T) {
+	flPath := "/tmp/testAlert2"
+
+	l, err := newUnixServer(flPath)
+	if err != nil {
+		t.Error(err)
+	}
+	go l.Serve()
+
+	writer, err := syslog.Dial("unix", flPath, syslog.LOG_ALERT, "id_alert")
+	if err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+	newLogger.SetSyslog(writer)
+
+	newLogger.SetLogLevel(7)
+
+	if err := newLogger.Alert("emergency_alert"); err != nil {
+		t.Error(err)
+	}
+	runtime.Gosched()
+	if err := writer.Close(); err != nil {
+		t.Error(err)
+	}
+	if err := l.Close(); err != nil {
+		t.Error(err)
+	}
+	expected := "emergency_alert"
+	if rcv := l.String(); !strings.Contains(rcv, expected) {
+		t.Errorf("Expected %q, received %q", expected, rcv)
+	}
+}
+
+func testCriticalLogger(t *testing.T) {
+	flPath := "/tmp/testCritical2"
+
+	l, err := newUnixServer(flPath)
+	if err != nil {
+		t.Error(err)
+	}
+	go l.Serve()
+
+	writer, err := syslog.Dial("unix", flPath, syslog.LOG_CRIT, "id_critical")
+	if err != nil {
+		t.Error(err)
+	}
+	newLogger := new(StdLogger)
+	newLogger.SetSyslog(writer)
+	newLogger.SetLogLevel(7)
+
+	if err := newLogger.Crit("critical_panic"); err != nil {
+		t.Error(err)
+	}
+	runtime.Gosched()
+	if err := writer.Close(); err != nil {
+		t.Error(err)
+	}
+	if err := l.Close(); err != nil {
+		t.Error(err)
+	}
+	expected := "critical_panic"
+	if rcv := l.String(); !strings.Contains(rcv, expected) {
+		t.Errorf("Expected %q, received %q", expected, rcv)
+	}
+}
+
+func testErrorLogger(t *testing.T) {
+	flPath := "/tmp/testError2"
+
+	l, err := newUnixServer(flPath)
+	if err != nil {
+		t.Error(err)
+	}
+	go l.Serve()
+
+	writer, err := syslog.Dial("unix", flPath, syslog.LOG_ERR, "id_error")
+	if err != nil {
+		t.Error(err)
+	}
+	newLogger := new(StdLogger)
+	newLogger.SetSyslog(writer)
+	newLogger.SetLogLevel(7)
+
+	if err := newLogger.Err("error_panic"); err != nil {
+		t.Error(err)
+	}
+	runtime.Gosched()
+	if err := writer.Close(); err != nil {
+		t.Error(err)
+	}
+	if err := l.Close(); err != nil {
+		t.Error(err)
+	}
+	expected := "error_panic"
+	if rcv := l.String(); !strings.Contains(rcv, expected) {
+		t.Errorf("Expected %q, received %q", expected, rcv)
+	}
+}
+
+func testWarningLogger(t *testing.T) {
+	flPath := "/tmp/testWarning2"
+
+	l, err := newUnixServer(flPath)
+	if err != nil {
+		t.Error(err)
+	}
+	go l.Serve()
+
+	writer, err := syslog.Dial("unix", flPath, syslog.LOG_WARNING, "id_warning")
+	if err != nil {
+		t.Error(err)
+	}
+	newLogger := new(StdLogger)
+	newLogger.SetSyslog(writer)
+	newLogger.SetLogLevel(7)
+
+	if err := newLogger.Warning("warning_panic"); err != nil {
+		t.Error(err)
+	}
+	runtime.Gosched()
+	if err := writer.Close(); err != nil {
+		t.Error(err)
+	}
+	if err := l.Close(); err != nil {
+		t.Error(err)
+	}
+	expected := ""
+	if rcv := l.String(); !strings.Contains(rcv, expected) {
+		t.Errorf("Expected %q, received %q", expected, rcv)
+	}
+}
+
+func testNoticeLogger(t *testing.T) {
+	flPath := "/tmp/testNotice2"
+
+	l, err := newUnixServer(flPath)
+	if err != nil {
+		t.Error(err)
+	}
+	go l.Serve()
+
+	writer, err := syslog.Dial("unix", flPath, syslog.LOG_NOTICE, "id_notice")
+	if err != nil {
+		t.Error(err)
+	}
+	newLogger := new(StdLogger)
+	newLogger.SetSyslog(writer)
+	newLogger.SetLogLevel(7)
+
+	if err := newLogger.Notice("notice_panic"); err != nil {
+		t.Error(err)
+	}
+	runtime.Gosched()
+
+	if err := writer.Close(); err != nil {
+		t.Error(err)
+	}
+	if err := l.Close(); err != nil {
+		t.Error(err)
+	}
+	expected := "notice_panic"
+	if rcv := l.String(); !strings.Contains(rcv, expected) {
+		t.Errorf("Expected %q, received %q", expected, rcv)
+	}
+}
+
+func testInfoLogger(t *testing.T) {
+	flPath := "/tmp/testInfo2"
+
+	l, err := newUnixServer(flPath)
+	if err != nil {
+		t.Error(err)
+	}
+	go l.Serve()
+
+	writer, err := syslog.Dial("unix", flPath, syslog.LOG_NOTICE, "id_info")
+	if err != nil {
+		t.Error(err)
+	}
+	newLogger := new(StdLogger)
+	newLogger.SetSyslog(writer)
+	newLogger.SetLogLevel(7)
+
+	if err := newLogger.Info("info_panic"); err != nil {
+		t.Error(err)
+	}
+	runtime.Gosched()
+
+	if err := writer.Close(); err != nil {
+		t.Error(err)
+	}
+	if err := l.Close(); err != nil {
+		t.Error(err)
+	}
+	expected := "info_panic"
+	if rcv := l.String(); !strings.Contains(rcv, expected) {
+		t.Errorf("Expected %q, received %q", expected, rcv)
+	}
+}
+
+func testDebugLogger(t *testing.T) {
+	flPath := "/tmp/testDebug2"
+
+	l, err := newUnixServer(flPath)
+	if err != nil {
+		t.Error(err)
+	}
+	go l.Serve()
+
+	writer, err := syslog.Dial("unix", flPath, syslog.LOG_NOTICE, "id_debug")
+	if err != nil {
+		t.Error(err)
+	}
+	newLogger := new(StdLogger)
+	newLogger.SetSyslog(writer)
+	newLogger.SetLogLevel(7)
+
+	if err := newLogger.Debug("debug_panic"); err != nil {
+		t.Error(err)
+	}
+	runtime.Gosched()
+
+	if err := writer.Close(); err != nil {
+		t.Error(err)
+	}
+	if err := l.Close(); err != nil {
+		t.Error(err)
+	}
+	expected := "debug_panic"
+	if rcv := l.String(); !strings.Contains(rcv, expected) {
+		t.Errorf("Expected %q, received %q", expected, rcv)
+	}
+}
diff --git a/utils/logger_test.go b/utils/logger_test.go
new file mode 100644
index 000000000..7f9720f01
--- /dev/null
+++ b/utils/logger_test.go
@@ -0,0 +1,324 @@
+/*
+Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
+Copyright (C) ITsysCOM GmbH
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>
+*/
+
+package utils
+
+import (
+	"bytes"
+	"io/ioutil"
+	"log"
+	syslog "log/syslog"
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestEmergLogger(t *testing.T) {
+	output := new(bytes.Buffer)
+	log.SetOutput(output)
+	loggertype := MetaSysLog
+	id := "id_emerg"
+	if err := Newlogger(loggertype, id); err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+
+	newLogger.SetLogLevel(-1)
+	if err := newLogger.Emerg(EmptyString); err != nil {
+		t.Error(err)
+	} else {
+		newLogger.SetLogLevel(LOGLEVEL_EMERGENCY)
+		if err := newLogger.Emerg("emergency_panic"); err != nil {
+			t.Error(err)
+		}
+		expected := "CGRateS <id_emerg> [EMERGENCY] emergency_panic"
+		if rcv := output.String(); !strings.Contains(rcv, expected) {
+			t.Errorf("Expected %+v, received %+v", expected, rcv)
+		}
+	}
+
+	log.SetOutput(os.Stderr)
+}
+
+func TestAlertLogger(t *testing.T) {
+	output := new(bytes.Buffer)
+	log.SetOutput(output)
+	loggertype := MetaSysLog
+	id := "id_alert"
+	if err := Newlogger(loggertype, id); err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+
+	newLogger.SetLogLevel(0)
+	if err := newLogger.Alert("Alert"); err != nil {
+		t.Error(err)
+	} else {
+		newLogger.SetLogLevel(LOGLEVEL_ALERT)
+		if err := newLogger.Alert("Alert"); err != nil {
+			t.Error(err)
+		}
+		expected := "CGRateS <id_alert> [ALERT] Alert"
+		if rcv := output.String(); !strings.Contains(rcv, expected) {
+			t.Errorf("Expected %+v, received %+v", expected, rcv)
+		}
+	}
+
+	log.SetOutput(os.Stderr)
+}
+
+func TestCritLogger(t *testing.T) {
+	output := new(bytes.Buffer)
+	log.SetOutput(output)
+
+	loggertype := MetaSysLog
+	id := "id_crit"
+	if err := Newlogger(loggertype, id); err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+
+	newLogger.SetLogLevel(1)
+	if err := newLogger.Crit("Critical_level"); err != nil {
+		t.Error(err)
+	} else {
+		newLogger.logLevel = LOGLEVEL_CRITICAL
+		if err := newLogger.Crit("Critical_level"); err != nil {
+			t.Error(err)
+		}
+		expected := "CGRateS <id_crit> [CRITICAL] Critical_level"
+		if rcv := output.String(); !strings.Contains(rcv, expected) {
+			t.Errorf("Expected %+v, received %+v", expected, rcv)
+		}
+	}
+
+	log.SetOutput(os.Stderr)
+}
+
+func TestErrorLogger(t *testing.T) {
+	output := new(bytes.Buffer)
+	log.SetOutput(output)
+
+	loggertype := MetaSysLog
+	id := "id_error"
+	if err := Newlogger(loggertype, id); err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+
+	newLogger.SetLogLevel(2)
+	if err := newLogger.Err("error_panic"); err != nil {
+		t.Error(err)
+	} else {
+		newLogger.SetLogLevel(LOGLEVEL_ERROR)
+		if err := newLogger.Err("error_panic"); err != nil {
+			t.Error(err)
+		}
+		expected := "CGRateS <id_error> [ERROR] error_panic"
+		if rcv := output.String(); !strings.Contains(rcv, expected) {
+			t.Errorf("Expected %+v, received %+v", expected, rcv)
+		}
+	}
+
+	log.SetOutput(os.Stderr)
+}
+
+func TestWarningLogger(t *testing.T) {
+	output := new(bytes.Buffer)
+	log.SetOutput(output)
+
+	loggertype := MetaSysLog
+	id := "id_error"
+	if err := Newlogger(loggertype, id); err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+
+	newLogger.SetLogLevel(3)
+	if err := newLogger.Warning("warning_panic"); err != nil {
+		t.Error(err)
+	} else {
+		newLogger.SetLogLevel(LOGLEVEL_WARNING)
+		if err := newLogger.Warning("warning_panic"); err != nil {
+			t.Error(err)
+		}
+		expected := "CGRateS <id_error> [WARNING] warning_panic"
+		if rcv := output.String(); !strings.Contains(rcv, expected) {
+			t.Errorf("Expected %+v, received %+v", expected, rcv)
+		}
+	}
+
+	log.SetOutput(os.Stderr)
+}
+
+func TestNoticeLogger(t *testing.T) {
+	output := new(bytes.Buffer)
+	log.SetOutput(output)
+
+	loggertype := MetaSysLog
+	id := "id_notice"
+	if err := Newlogger(loggertype, id); err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+
+	newLogger.SetLogLevel(4)
+	if err := newLogger.Notice("notice_panic"); err != nil {
+		t.Error(err)
+	} else {
+		newLogger.SetLogLevel(LOGLEVEL_NOTICE)
+		if err := newLogger.Notice("notice_panic"); err != nil {
+			t.Error(err)
+		}
+		expected := "CGRateS <id_notice> [NOTICE] notice_panic"
+		if rcv := output.String(); !strings.Contains(rcv, expected) {
+			t.Errorf("Expected %+v, received %+v", expected, rcv)
+		}
+	}
+
+	log.SetOutput(os.Stderr)
+}
+
+func TestInfoLogger(t *testing.T) {
+	output := new(bytes.Buffer)
+	log.SetOutput(output)
+
+	loggertype := MetaSysLog
+	id := "id_info"
+	if err := Newlogger(loggertype, id); err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+
+	newLogger.SetLogLevel(5)
+	if err := newLogger.Info("info_panic"); err != nil {
+		t.Error(err)
+	} else {
+		newLogger.SetLogLevel(LOGLEVEL_INFO)
+		if err := newLogger.Info("info_panic"); err != nil {
+			t.Error(err)
+		}
+		expected := "CGRateS <id_info> [INFO] info_panic"
+		if rcv := output.String(); !strings.Contains(rcv, expected) {
+			t.Errorf("Expected %+v, received %+v", expected, rcv)
+		}
+	}
+
+	log.SetOutput(os.Stderr)
+}
+
+func TestDebugLogger(t *testing.T) {
+	output := new(bytes.Buffer)
+	log.SetOutput(output)
+
+	loggertype := MetaSysLog
+	id := "id_debug"
+	if err := Newlogger(loggertype, id); err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+
+	newLogger.SetLogLevel(6)
+	if err := newLogger.Debug("debug_panic"); err != nil {
+		t.Error(err)
+	} else {
+		newLogger.SetLogLevel(LOGLEVEL_DEBUG)
+		if err := newLogger.Debug("debug_panic"); err != nil {
+			t.Error(err)
+		}
+		newLogger.GetSyslog()
+		expected := "GRateS <id_debug> [DEBUG] debug_panic"
+		if rcv := output.String(); !strings.Contains(rcv, expected) {
+			t.Errorf("Expected %+v, received %+v", expected, rcv)
+		}
+	}
+
+	log.SetOutput(os.Stderr)
+}
+
+func TestWriteLogger(t *testing.T) {
+	log.SetOutput(os.Stderr)
+
+	loggertype := MetaSysLog
+	id := "id_write"
+	if err := Newlogger(loggertype, id); err != nil {
+		t.Error(err)
+	}
+
+	newWriter, err := syslog.New(syslog.LOG_INFO|syslog.LOG_DAEMON, "CGRates id_write")
+	if err != nil {
+		t.Error(err)
+	}
+	newLogger := new(StdLogger)
+	newLogger.SetSyslog(newWriter)
+
+	if n, err := newLogger.Write([]byte(EmptyString)); err != nil {
+		t.Error(err)
+	} else if n != 1 {
+		t.Errorf("Expected 1, received %+v", n)
+	}
+
+	log.SetOutput(os.Stderr)
+}
+
+func TestCloseLogger(t *testing.T) {
+	log.SetOutput(ioutil.Discard)
+
+	loggertype := MetaStdLog
+	if err := Newlogger(loggertype, EmptyString); err != nil {
+		t.Error(err)
+	}
+
+	newLogger := new(StdLogger)
+	if err := newLogger.Close(); err != nil {
+		t.Error(err)
+	}
+	newWriter, err := syslog.New(0, "CGRates")
+	if err != nil {
+		t.Error(err)
+	}
+	x := newLogger.GetSyslog()
+	x = newWriter
+
+	newLogger.SetSyslog(x)
+	if err := newLogger.Close(); err != nil {
+		t.Error(err)
+	}
+}
+
+func TestLogStackLogger(t *testing.T) {
+	LogStack()
+}
+
+func TestNewLoggerInvalidLoggerType(t *testing.T) {
+	log.SetOutput(ioutil.Discard)
+
+	loggertype := "Invalid_TYPE"
+	expected := "unsuported logger: <Invalid_TYPE>"
+	if err := Newlogger(loggertype, EmptyString); err == nil || err.Error() != expected {
+		t.Errorf("Expected %+v, received %+v", expected, err)
+	}
+}