diff --git a/pyren/mod_ddt.py b/pyren/mod_ddt.py
index b1c2e05..cf0abf6 100755
--- a/pyren/mod_ddt.py
+++ b/pyren/mod_ddt.py
@@ -123,7 +123,7 @@ class DDT():
         dumpIs = False
         for root, dirs, files in os.walk("./dumps"):
             for f in files:
-                if (xfn + '.') in f:
+                if ('_' + xfn + '.') in f:
                     dumpIs = True
                     break