diff --git a/roles/mail_forwarder/tests/test_connectivity_from_client.py b/roles/mail_forwarder/tests/test_connectivity_from_client.py
index 1bdccffe8044535fd9700a7d30a82286f4327764..759fa385d657df15a48fd471921155562b0241d8 100644
--- a/roles/mail_forwarder/tests/test_connectivity_from_client.py
+++ b/roles/mail_forwarder/tests/test_connectivity_from_client.py
@@ -15,6 +15,12 @@ def test_connectivity_from_client(Command, Sudo):
 
         ping = Command('hping3 -S -p 25 -c 1 parameters-mandatory')
         assert ping.rc != 0
+        assert "100% packet loss" in ping.stderr
 
         ping = Command('hping3 -S -p 25 -c 1 parameters-optional')
         assert ping.rc != 0
+        assert "100% packet loss" in ping.stderr
+
+        ping = Command('hping3 -S -p 25 -c 1 parameters-no-incoming')
+        assert "100% packet loss" in ping.stderr
+        assert ping.rc != 0