diff --git a/tox.ini b/tox.ini
index bb37438..3a17c18 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,6 +5,7 @@ skipsdist=true
 commands =
     {envpython} -V
     {envpython} -m compileall speedtest_cli.py
+    {envpython} speedtest_cli.py
 
 [testenv:flake8]
 basepython=python
@@ -17,3 +18,4 @@ commands =
 commands =
     pypy -V
     pypy -m compileall speedtest_cli.py
+    pypy speedtest_cli.py