diff --git a/tox.ini b/tox.ini
index fb2be51..c6c081c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,8 @@ envlist = py26,py27,py26sa07,py27sa07,py26sa08,py27sa08,py26sa09,py27sa09,py33,p
 [testenv]
 usedevelop = True
 whitelist_externals = bash
-install_command = pip install {opts} {packages}
+# Avoid psycopg2 wheel package rename warnings by not using the binary.
+install_command = pip install --no-binary psycopg2 {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt