diff --git a/tools/ostestr_compat_shim.sh b/tools/ostestr_compat_shim.sh
deleted file mode 100755
index 36c59a6b..00000000
--- a/tools/ostestr_compat_shim.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/sh
-
-# preserve old behavior of using an arg as a regex when '--' is not present
-case $@ in
-    (*--*) stestr run $@;;
-    ('') stestr run;;
-    (*) stestr run --regex "$@"
-esac
diff --git a/tox.ini b/tox.ini
index a6bf6b1d..f565edb1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ deps = -r{toxinidir}/requirements.txt
 whitelist_externals = sh
                       find
 commands = find . -type f -name "*.py[c|o]" -delete
-           {toxinidir}/tools/ostestr_compat_shim.sh {posargs}
+           stestr run {posargs}
 
 [testenv:fullstack]
 basepython = python2.7