Updated tox.ini to run py2 tests only on android module

Author: inclement

tox.ini

@@ -8,13 +8,16 @@ deps =
     pytest
     virtualenv
     py3: coveralls
-# makes it possible to override pytest args, e.g.
-# tox -- tests/test_graph.py
+# posargs will be replaced by the tox args, so you can override pytest
+# args e.g. `tox -- tests/test_graph.py`
 commands = pytest {posargs:tests/}
 passenv = TRAVIS TRAVIS_*
 setenv =
     PYTHONPATH={toxinidir}
 
+[testenv:py27]
+commands = pytest {posargs:tests/test_androidmodule_ctypes_finder.py}
+
 [testenv:py3]
 # for py3 env we will get code coverage
 commands =