diff --git a/tests/wscript b/tests/wscript
index c67d252..e44f2a4 100644
--- a/tests/wscript
+++ b/tests/wscript
@@ -10,4 +10,5 @@
         source=bld.path.ant_glob(['*.cpp'] + ['%s/**/*.cpp' % tool for tool in bld.env['BUILD_TOOLS']]),
         use=['core-objects'] + ['%s-objects' % tool for tool in bld.env['BUILD_TOOLS']],
         headers='../common.hpp boost-test.hpp',
+        defines='TMP_TESTS_PATH=\"%s/tmp-tests\"' % bld.bldnode,
         )