add a RENormalizer to not use ellipsis

src/ZODB/tests/blob_transaction.txt

@@ -394,7 +394,7 @@ And we shouldn't be able to read the data that we saved:
     >>> blob_storage.loadBlob(blob._p_oid, s1)
     Traceback (most recent call last):
     ...
-    POSKeyError: 'No blob file at ...'
+    POSKeyError: 'No blob file at /var/blobs/0x00/0x039bfdeeb0364777.blob'
 
 Of course the old data should be unaffected:
 
@@ -411,7 +411,7 @@ Similarly, the new object wasn't added to the storage:
     >>> blob_storage.loadBlob(blob._p_oid, s2)
     Traceback (most recent call last):
     ...
-    POSKeyError: 'No blob file at ...'
+    POSKeyError: 'No blob file at /var/blobs/0x00/0x039bfdeeb0364777.blob'
 
 .. clean up
 

src/ZODB/tests/testblob.py

@@ -682,6 +682,9 @@ def storage_reusable_suite(prefix, factory,
         "blob_connection.txt", "blob_importexport.txt",
         "blob_transaction.txt",
         setUp=setup, tearDown=zope.testing.setupstack.tearDown,
+        checker=zope.testing.renormalizing.RENormalizing([
+            (re.compile(r'/.*/blobs/.*\.blob'), '<BLOB STORAGE PATH>')
+            ]),
         optionflags=doctest.ELLIPSIS,
         ))
     if test_packing: