diff --git a/.stestr.conf b/.stestr.conf
index 126bb41f..ebc11d4c 100644
--- a/.stestr.conf
+++ b/.stestr.conf
@@ -1,4 +1,4 @@
 [DEFAULT]
-test_path=${OS_TEST_PATH:-./tests}
+test_path=./tests
 top_dir=./
-group_regex=.*(test_cert_setup)
+parallel_class=True
diff --git a/tox.ini b/tox.ini
index 2f1cf141..b52833d4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -28,9 +28,6 @@ passenv =
     no_proxy
     NO_PROXY
 
-[testenv:debug]
-commands = oslo_debug_helper -t tests {posargs}
-
 [testenv:linters]
 deps = {[testenv:pep8]deps}
 usedevelop = False
@@ -87,20 +84,3 @@ deps =
     pre-commit
 commands =
     pre-commit run --all-files --show-diff-on-failure
-
-[testenv:lower-constraints]
-basepython = python3
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt
-
-# This environment can be used to quickly validate that all needed system
-# packages required to successfully execute test targets are installed
-[testenv:bindep]
-# Do not install any requirements. We want this to be fast and work even if
-# system dependencies are missing, since it's used to tell you what system
-# dependencies are missing! This also means that bindep must be installed
-# separately, outside of the requirements files.
-deps = bindep
-commands = bindep test