diff --git a/engine/trends_test.go b/engine/trends_test.go
new file mode 100644
index 000000000..ea8d9ec94
--- /dev/null
+++ b/engine/trends_test.go
@@ -0,0 +1,45 @@
+/*
+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 engine
+
+import "testing"
+
+func TestTrendProfileTenantID(t *testing.T) {
+	profile := &TrendProfile{
+		Tenant: "cgrates.org",
+		ID:     "1",
+	}
+	result := profile.TenantID()
+	expected := "cgrates.org:1"
+	if result != expected {
+		t.Errorf("TenantID() = %v; want %v", result, expected)
+	}
+}
+
+func TestTrendTenantID(t *testing.T) {
+	trend := &Trend{
+		Tenant: "cgrates.org",
+		ID:     "1",
+	}
+	result := trend.TenantID()
+	expected := "cgrates.org:1"
+	if result != expected {
+		t.Errorf("TenantID() = %v; want %v", result, expected)
+	}
+}