diff --git a/p2p/net/mock/mock_test.go b/p2p/net/mock/mock_test.go
index 863e54f1c7..73c0954048 100644
--- a/p2p/net/mock/mock_test.go
+++ b/p2p/net/mock/mock_test.go
@@ -642,7 +642,7 @@ func TestEventBus(t *testing.T) {
 				t.Fatal("wrong remote peer")
 			}
 			if evnt.Connectedness != network.Connected {
-				t.Fatal("wrong connectedness type")
+				t.Fatalf("wrong connectedness type. Got: %v, expected: %v", evnt.Connectedness, network.Connected)
 			}
 		case evt := <-sub1.Out():
 			evnt := evt.(event.EvtPeerConnectednessChanged)