diff --git a/tox.ini b/tox.ini
index 9a2d6d2558..4676a9c5d3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,6 +9,7 @@ minversion = 3.8.0
 
 [testenv]
 changedir = tests
+allowlist_externals = sh
 deps =
     parameterized
     pytest