diff --git a/test/pEpTest/src/pEpTestTree.hh b/test/pEpTest/src/pEpTestTree.hh
index 206cbb0..b340d5b 100644
--- a/test/pEpTest/src/pEpTestTree.hh
+++ b/test/pEpTest/src/pEpTestTree.hh
@@ -8,7 +8,6 @@
 #include <functional>
 #include <map>
 #include "../../../src/pEpLog.hh"
-//#include "pEpTestModel.hh"
 
 // Yes, the mem mgmt is purely static on purpose (so far)
 
diff --git a/test/pEpTest/src/pEpTestTree.hxx b/test/pEpTest/src/pEpTestTree.hxx
index 7aa5ff7..18f77fd 100644
--- a/test/pEpTest/src/pEpTestTree.hxx
+++ b/test/pEpTest/src/pEpTestTree.hxx
@@ -1,4 +1,9 @@
-#include "pEpTestTree.hh"
+// This file is under GNU General Public License 3.0
+// see LICENSE.txt
+
+#ifndef LIBPEPADAPTER_PEPTEST_PEPTESTTREE_HXX
+#define LIBPEPADAPTER_PEPTEST_PEPTESTTREE_HXX
+
 #include "../../../src/std_utils.hh"
 #include "../../framework/utils.hh"
 #include <iostream>
@@ -398,3 +403,5 @@ namespace pEp {
         };
     } // namespace Test
 } // namespace pEp
+
+#endif // LIBPEPADAPTER_PEPTEST_PEPTESTTREE_HXX
\ No newline at end of file