diff --git a/tox.ini b/tox.ini
index 302f56478..8ddf4ed78 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,7 @@ setenv =
     PYTEST_ADDOPTS = {env:PYTEST_ADDOPTS:--numprocesses auto}
     PYTHONHASHSEED = 0
 # The default install command is python -I -m pip install {opts} {packages}
-install_command = python -I {toxinidir}/tools/pip_install.py {opts} {packages}
+install_command = python -I {toxinidir}/tools/pip_install.py -vvvvv {opts} {packages}
 deps =
     -e acme[test]
     -e certbot[test]