diff --git a/test-requirements.txt b/test-requirements.txt
index 40daf186..68e7d613 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -14,6 +14,7 @@ fixtures>=1.3.1 # Apache-2.0/BSD
 mock>=1.2 # BSD
 oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
+os-testr>=0.4.1 # Apache-2.0
 psycopg2>=2.5 # LGPL/ZPL
 pylint==1.4.5 # GNU GPL v2
 reno>=0.1.1 # Apache2
diff --git a/tools/pretty_tox.sh b/tools/pretty_tox.sh
deleted file mode 100644
index d1ff91e5..00000000
--- a/tools/pretty_tox.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/usr/bin/env bash
-
-set -ex
-set -o pipefail
-
-TESTRARGS=$1
-python setup.py testr --slowest --testr-args="--subunit $TESTRARGS" | subunit-trace -f
diff --git a/tox.ini b/tox.ini
index 0f05fe56..b8558a4b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,8 +12,7 @@ setenv =
 deps =
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
-commands = bash tools/pretty_tox.sh '{posargs}'
-whitelist_externals = bash
+commands = ostestr {posargs}
 passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 
 [testenv:cover]