diff --git a/test/OLItest/TestRunner.py b/test/OLItest/TestRunner.py
index e7fbaa7..320ddcf 100644
--- a/test/OLItest/TestRunner.py
+++ b/test/OLItest/TestRunner.py
@@ -148,6 +148,8 @@ class OLITestLib():
             assert res_t == 'OK'
             dirs = []
             for d in data:
+                if d == '':
+                    continue
                 if isinstance(d, tuple):
                     # literal (unquoted)
                     folder = b'"%s"' % d[1].replace('"', '\\"')