diff --git a/tox.ini b/tox.ini
index 91da309..3744d26 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,6 +6,7 @@ envlist =
     type_check
 skip_missing_interpreters = True
 skipsdist = True
+allowlist_externals=rm
 
 [testenv]
 commands = python -m pip install --upgrade pip