diff --git a/docs/tutorial/porcelain.txt b/docs/tutorial/porcelain.txt
index 74d7048d..b16f8739 100644
--- a/docs/tutorial/porcelain.txt
+++ b/docs/tutorial/porcelain.txt
@@ -1,34 +1,34 @@
 Porcelain
 =========
 
 The ``porcelain'' is the higher level interface, built on top of the lower
 level implementation covered in previous chapters of this tutorial. The
 ``dulwich.porcelain'' module in Dulwich is aimed to closely resemble
 the Git command-line API that you are familiar with.
 
 Basic concepts
 --------------
 The porcelain operations are implemented as top-level functions in the
 ``dulwich.porcelain'' module. Most arguments can either be strings or
 more complex Dulwich objects; e.g. a repository argument will either take
 a string with a path to the repository or an instance of a ``Repo`` object.
 
 Initializing a new repository
 -----------------------------
 
   >>> from dulwich import porcelain
 
   >>> repo = porcelain.init("myrepo")
 
 Clone a repository
 ------------------
 
   >>> porcelain.clone("git://github.com/jelmer/dulwich", "dulwich-clone")
 
 Commit changes
 --------------
 
   >>> r = porcelain.init("testrepo")
   >>> open("testrepo/testfile", "w").write("data")
-  >>> porcelain.add(r, "testrepo/testfile")
-  >>> porcelain.commit(r, "A sample commit")
+  >>> porcelain.add(r, "testfile")
+  >>> porcelain.commit(r, b"A sample commit")