diff -r ddeb510d6815 -r 2c0aa02ecd5a tests/test-storage.py
--- a/tests/test-storage.py	Tue Oct 16 15:24:06 2018 +0200
+++ b/tests/test-storage.py	Tue Oct 16 16:24:46 2018 +0200
@@ -49,7 +49,8 @@
     if rawtext is not None:
         fl._revlog.addrawrevision(rawtext, tr, linkrev, p1, p2, node, flags)
     elif delta is not None:
-        raise error.Abort('support for storing raw deltas not yet supported')
+        fl._revlog.addrawrevision(rawtext, tr, linkrev, p1, p2, node, flags,
+                                  cachedelta=delta)
     else:
         raise error.Abort('must supply rawtext or delta arguments')