diff --git a/tox.ini b/tox.ini
index 7f8e6cc..d5bc302 100644
--- a/tox.ini
+++ b/tox.ini
@@ -48,7 +48,7 @@ deps =
 [testenv:py27-rp3]
 basepython = python2.7
 commands =
-    coverage run {envbindir}/zope-testrunner --path=src/RestrictedPython --all {posargs}
+    coverage run {envbindir}/zope-testrunner --path=src/RestrictedPython --all -v {posargs}
 deps =
     .[test]
     zope.testrunner