diff --git a/.stestr.conf b/.stestr.conf
new file mode 100644
index 0000000..5c6cf95
--- /dev/null
+++ b/.stestr.conf
@@ -0,0 +1,3 @@
+[DEFAULT]
+test_path=${OS_TEST_PATH:-./observabilityclient/tests/unit}
+top_dir=./
diff --git a/tox.ini b/tox.ini
index b421f7f..37f48b4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,8 +4,6 @@ envlist = py3,pep8
 
 [testenv]
 usedevelop = True
-setenv =
-  OS_TEST_PATH = ./observabilityclient/tests/unit
 passenv =
   PROMETHEUS_*
   OBSERVABILITY_*
@@ -13,7 +11,7 @@ deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/test-requirements.txt
-commands = stestr run --slowest --test-path {env:OS_TEST_PATH} {posargs}
+commands = stestr run --slowest {posargs}
 
 [testenv:pep8]
 skip_install = true
@@ -27,8 +25,7 @@ commands = {posargs}
 
 [testenv:cover]
 setenv =
-    {[testenv]setenv}
-    PYTHON=coverage run --source observabilityclient --parallel-mode
+  PYTHON=coverage run --source observabilityclient --parallel-mode
 commands =
   coverage erase
   {[testenv]commands}