diff --git a/tools/pretty_tox.sh b/tools/pretty_tox.sh
new file mode 100755
index 0000000..ff554c5
--- /dev/null
+++ b/tools/pretty_tox.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+set -o pipefail
+
+TESTRARGS=$1
+python setup.py testr --slowest --testr-args="--subunit $TESTRARGS" | subunit-trace --no-failure-debug -f
diff --git a/tox.ini b/tox.ini
index 0ea4e95..d2de02c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,11 +6,12 @@ skipsdist = True
 [testenv]
 usedevelop = True
 install_command = pip install -U {opts} {packages}
+whitelist_externals = bash
 setenv =
    VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-commands = python setup.py testr --slowest --testr-args='{posargs}'
+commands = bash tools/pretty_tox.sh {posargs}
 
 [testenv:pep8]
 commands = flake8