diff --git a/utils/slice_test.go b/utils/slice_test.go
new file mode 100644
index 000000000..5347118e5
--- /dev/null
+++ b/utils/slice_test.go
@@ -0,0 +1,38 @@
+/*
+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 "testing"
+
+func TestAvg(t *testing.T) {
+	values := []float64{1, 2, 3}
+	result := Avg(values)
+	expected := 2.0
+	if expected != result {
+		t.Errorf("Wrong Avg: expected %v got %v", expected, result)
+	}
+}
+
+func TestAvgEmpty(t *testing.T) {
+	values := []float64{}
+	result := Avg(values)
+	expected := 0.0
+	if expected != result {
+		t.Errorf("Wrong Avg: expected %v got %v", expected, result)
+	}
+}