diff --git a/Python3.md b/Python3.md
index 1ada217..88fce5f 100644
--- a/Python3.md
+++ b/Python3.md
@@ -106,6 +106,7 @@ Delete this bit:
 ```#!python
 from future import standard_library
 standard_library.install_aliases()
+from builtins import str
 ```
 
 And replace the `from builtins import *` variant, if any, with:
@@ -121,7 +122,7 @@ This adds builtins that match Python 3's semantics. The `#noqa: F401` keeps flak
 Consider using this sed command to execute the above:
 
 ```
-$ sed -ie '/from future import standard_library/d;/standard_library.install_aliases()/d;s/from builtins import \*/from future.utils import PY2\\nif PY2:\\n    from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401/' path/to/file.py
+$ sed -ie '/from future import standard_library/d;/standard_library.install_aliases()/d;/from builtins import str/d;s/from builtins import \*/from future.utils import PY2\\nif PY2:\\n    from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401/' src/allmydata/test/test_runner.py
 ```
 
 **Fourth**, manually review the code. Futureize is nice, but it very definitely doesn't catch everything, or it makes wrong decisions.