diff --git a/tox.ini b/tox.ini
index 3f6d26587..f7a7f96b3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,7 +22,6 @@ passenv = TAHOE_LAFS_* SUBUNITREPORTER_* USERPROFILE HOMEDRIVE HOMEPATH
 # this problem.
 deps =
      certifi
-     python-subunit
      subunitreporter
 # We add usedevelop=True for speed, and extras=test to get things like "mock"
 # that are required for our unit tests.