diff --git a/tox.ini b/tox.ini
--- a/tox.ini
+++ b/tox.ini
@@ -7,6 +7,7 @@
 deps =
   pytest-cov
   pifpaf
+  dev: ipdb
 setenv =
   LC_ALL=C.UTF-8
   LC_CTYPE=C.UTF-8