diff --git a/test-requirements.txt b/test-requirements.txt
index 095ec9c..9ea2415 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,2 +1,2 @@
-flake8>=2.2.4,<=2.4.1
-os-testr>=0.4.1
+flake8>=2.2.4
+stestr>=2.2.0
diff --git a/tox.ini b/tox.ini
index 65b8dd2..b96b562 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,7 +11,7 @@ setenv = VIRTUAL_ENV={envdir}
          PYTHONHASHSEED=0
 install_command =
   pip install {opts} {packages}
-commands = ostestr {posargs}
+commands = stestr run {posargs}
 
 [testenv:py35]
 basepython = python3.5
@@ -25,6 +25,12 @@ deps = -r{toxinidir}/test-requirements.txt
 # TODO: Need to write unit tests then remove the following command.
 commands = /bin/true
 
+[testenv:py3]
+basepython = python3
+deps = -r{toxinidir}/test-requirements.txt
+# TODO: Need to write unit tests then remove the following command.
+commands = /bin/true
+
 [testenv:pep8]
 basepython = python3
 deps = -r{toxinidir}/test-requirements.txt