diff --git a/tox.ini b/tox.ini
index e4ef08f8..150ac999 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,6 +12,7 @@ setenv = VIRTUAL_ENV={envdir}
 install_command = pip install -U {opts} {packages}
 commands = find {toxinidir} -type f -not -path '{toxinidir}/.tox/*' -not -path '*/__pycache__/*' -name '*.py[c|o]' -delete
 deps = -r{toxinidir}/test-requirements.txt
+whitelist_externals = find
 
 [testenv:venv]
 basepython = python3