diff --git a/pkg/node/protocol_test.go b/pkg/node/protocol_test.go
index 90b50cf..6816607 100644
--- a/pkg/node/protocol_test.go
+++ b/pkg/node/protocol_test.go
@@ -48,7 +48,7 @@ func TestProtocol_ValidateResponse_Bad(t *testing.T) {
 //
 //	msg, _ := NewMessage(MsgPong, "sender", "receiver", nil)
 //	err := handler.ValidateResponse(msg, MsgStats)
-//	if IsProtocolError(err) { t.Error("type mismatch is not a ProtocolError") }
+//	if !IsProtocolError(err) { t.Error("type mismatch must be a ProtocolError") }
 func TestProtocol_ValidateResponse_Ugly(t *testing.T) {
 	handler := &ResponseHandler{}
 
@@ -57,8 +57,8 @@ func TestProtocol_ValidateResponse_Ugly(t *testing.T) {
 	if err == nil {
 		t.Error("expected error for wrong type")
 	}
-	if IsProtocolError(err) {
-		t.Error("type mismatch should not produce a ProtocolError")
+	if !IsProtocolError(err) {
+		t.Error("type mismatch must produce a ProtocolError")
 	}
 }