diff --git a/agents/astagent_test.go b/agents/astagent_test.go
new file mode 100644
index 000000000..6fa0cc113
--- /dev/null
+++ b/agents/astagent_test.go
@@ -0,0 +1,28 @@
+/*
+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 agents
+
+import (
+	"testing"
+
+	"github.com/cgrates/cgrates/sessions"
+)
+
+func TestAAsSessionSClientIface(t *testing.T) {
+	_ = sessions.SessionSClient(new(AsteriskAgent))
+}
diff --git a/agents/fsagent_test.go b/agents/fsagent_test.go
new file mode 100644
index 000000000..76b0e03aa
--- /dev/null
+++ b/agents/fsagent_test.go
@@ -0,0 +1,28 @@
+/*
+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 agents
+
+import (
+	"testing"
+
+	"github.com/cgrates/cgrates/sessions"
+)
+
+func TestFAsSessionSClientIface(t *testing.T) {
+	_ = sessions.SessionSClient(new(FSsessions))
+}
diff --git a/agents/kamagent_test.go b/agents/kamagent_test.go
new file mode 100644
index 000000000..8cd9729c8
--- /dev/null
+++ b/agents/kamagent_test.go
@@ -0,0 +1,28 @@
+/*
+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 agents
+
+import (
+	"testing"
+
+	"github.com/cgrates/cgrates/sessions"
+)
+
+func TestKAsSessionSClientIface(t *testing.T) {
+	_ = sessions.SessionSClient(new(KamailioAgent))
+}