diff --git a/test/runner/lib/util.py b/test/runner/lib/util.py
index a7eb55f266..899d5fccb1 100644
--- a/test/runner/lib/util.py
+++ b/test/runner/lib/util.py
@@ -202,7 +202,8 @@ def common_environment():
 
     optional = (
         'HTTPTESTER',
-        'SSH_AUTH_SOCK'
+        'LD_LIBRARY_PATH',
+        'SSH_AUTH_SOCK',
     )
 
     env.update(pass_vars(required=required, optional=optional))