diff --git a/examples/temporary_example.py b/examples/temporary_example.py
index f30070bbd37000ce43e036873db95274008c7268..862369411056d87d411c3e173bd479e9a7e93e01 100644
--- a/examples/temporary_example.py
+++ b/examples/temporary_example.py
@@ -2,8 +2,8 @@ import random
 
 from flatland.envs.generators import random_rail_generator
 from flatland.envs.rail_env import RailEnv
-from flatland.utils.rendertools import *
 from flatland.utils.rendertools import RenderTool
+import numpy as np
 
 random.seed(0)
 np.random.seed(0)
diff --git a/tox.ini b/tox.ini
index 1c9a170724b2ed111eac11061ba598eea52a571c..71edb7b5fbe2652b00bf48fc63a35d523c791a7a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,7 @@ ignore = E121 E126 E123 E128 E133 E226 E241 E242 E704 W291 W293 W391 W503 W504 W
 [testenv:flake8]
 basepython = python
 deps = flake8
-commands = flake8 flatland
+commands = flake8 flatland tests examples
 
 [testenv:docs]
 basepython = python