diff --git a/ietf/tests.py b/ietf/tests.py
index f21b2478d..5d48ca266 100644
--- a/ietf/tests.py
+++ b/ietf/tests.py
@@ -10,7 +10,6 @@ import django.test.simple
 from django.test import TestCase
 from django.conf import settings
 from django.db import connection
-import ietf.settings
 import ietf.urls
 
 
@@ -60,7 +59,7 @@ class UrlTestCase(TestCase):
         # find test urls
         self.testtuples = []
         self.testurls = []
-        for root, dirs, files in os.walk(ietf.settings.BASE_DIR):
+        for root, dirs, files in os.walk(settings.BASE_DIR):
             if "testurl.list" in files:
                 filename = root+"/testurl.list" # yes, this is non-portable
                 file = open(filename) 
@@ -138,9 +137,20 @@ class UrlTestCase(TestCase):
                             testtext = reduce(response.content)
                             goodtext = reduce(goodhtml)
                             if not testtext == goodtext:
-                                print "Diff: %s" % (url)
-                                for line in unified_diff(goodtext, testtext, url, master, lineterm=False):
-                                    print line
+                                diff = "\n".join(unified_diff(goodtext, testtext, url, master, lineterm=False))
+                                dfile = "%s/../test/diff/%s" % (settings.BASE_DIR, url.replace("/", "_"))
+                                if os.path.exists(dfile):
+                                    dfile = open(dfile)
+                                    print "Reading OK diff file:", dfile.name
+                                    okdiff = dfile.read()
+                                    dfile.close()
+                                else:
+                                    okdiff = ""
+                                if diff.strip() == okdiff.strip():
+                                    print "OK  diff %s" % (url)
+                                else:
+                                    print "Diff:    %s" % (url)
+                                    print diff
                     except urllib.URLError, e:
                         print "Failed retrieving master text for comparison: %s" % e
 
diff --git a/test/diff/_ipr_ipr-657_ b/test/diff/_ipr_ipr-657_
new file mode 100644
index 000000000..a0c4c84f5
--- /dev/null
+++ b/test/diff/_ipr_ipr-657_
@@ -0,0 +1,44 @@
+--- /ipr/ipr-657/ False
++++ https://datatracker.ietf.org/public/ipr_detail_show.cgi?&ipr_id=657 False
+@@ -6,6 +6,7 @@False
+ disclosure ID #590, " France Telecom SA's general license statement
+ (1) ". Click here to update this IPR disclosure Submitted Date:
+ November 8, 2005
++
+ I. Patent Holder/Applicant ("Patent Holder")
+ 
+ Legal Name: France Telecom SA
+@@ -43,7 +44,6 @@False
+ Country: to be confirmed by individual patent declarations
+ 
+ Additional Notes:
+-
+ to be confirmed by individual patent declarations
+ 
+ B. Does this disclosure relate to an unpublished pending patent
+@@ -67,12 +67,14 @@False
+ Licensing information, comments, notes, or URL for further
+ information:
+ 
+-NOTE: The individual submitting this template represents and warrants
++No information submitted
++
++Note: The individual submitting this template represents and warrants
+ that he or she is authorized by the Patent Holder to agree to the
+ above-selected licensing declaration.
+ 
+ V. Contact Information of Submitter of this Form (if different from
+-IETF Participant in Section III above)
++the Contact Information above)
+ 
+ Name: Serge RAES
+ 
+@@ -90,4 +92,8 @@False
+ 
+ Email: serge.raes@francetelecom.com
+ 
++VI. Other Notes:
+ 
++No information submitted
++
++