diff --git a/tox.ini b/tox.ini
index d35a0a99a..18cc64b78 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,8 +1,7 @@
 [testenv]
 changedir=testing
-argv=py.test
-    --confcutdir=..
-    --junitxml=junit-{envname}.xml
+commands=
+  py.test --confcutdir=..  --junitxml=junit-{envname}.xml []
 [testenv:py26]
 basepython=python2.6
 [testenv:py25]
@@ -17,10 +16,8 @@ basepython=python3.1
 changedir=testing
 basepython=jython
 deps=pytest-xdist 
-argv=
-    {envpython}
-    {envbindir}/py.test-jython 
-    --confcutdir=..
-    --junitxml=junit-{envname}.xml
-    acceptance_test.py 
-    plugin 
+commands=
+    {envpython} {envbindir}/py.test-jython --confcutdir=..  \
+        --junitxml=junit-{envname}1.xml [io_ code]
+    {envpython} {envbindir}/py.test-jython --confcutdir=..  \
+        --junitxml=junit-{envname}2.xml acceptance_test.py plugin