diff --git a/tests/system/base.py b/tests/system/base.py
index 2f0cb06d..ddd5ded3 100644
--- a/tests/system/base.py
+++ b/tests/system/base.py
@@ -79,7 +79,8 @@ def get_tmp_answers_file(self, answers):
 
     @property
     def nulecule_lib(self):
-        return os.environ['NULECULE_LIB']
+        return os.environ.get('NULECULE_LIB') or \
+            os.path.join(os.path.dirname(__file__), '../../../nulecule-library')
 
     @classmethod
     def disable_selinux(cls):