diff --git a/lib/sumfiles.py b/lib/sumfiles.py
index d4a06f5..fcfcd26 100644
--- a/lib/sumfiles.py
+++ b/lib/sumfiles.py
@@ -112,6 +112,12 @@ class DejaResults(object):
             self.parse_sum_line(cur_results, line)
         return cur_results
 
+    def transform_re (self, xfails):
+        ret = {}
+        for r in xfails:
+            ret[r] = re.compile (r)
+        return ret
+
     # Compute regressions between RESULTS and BASELINE on BUILDER.
     # BASELINE will be modified if any new PASSes are seen.
     # Returns a regression report, as a string.
@@ -120,12 +126,20 @@ class DejaResults(object):
         our_keys.sort()
         result = ''
         xfails = self.read_xfail (builder)
+        xfails_re = self.transform_re (xfails)
         if xfails is None:
             xfails = {}
         for key in our_keys:
             # An XFAIL entry means we have an unreliable test.
-            if key in xfails:
+            cont = False
+            for x in xfails_re:
+                if re.match (xfails_re[x], (key)):
+                    cont = True
+                    break
+            if cont:
                 continue
+#            if key in xfails:
+#                continue
             # A transition to PASS means we should update the baseline.
             if results[key] == 'PASS':
                 if key not in baseline or baseline[key] != 'PASS':