Improve testing with tox

setup.py

@@ -35,9 +35,16 @@ def get_version():
         'sphinx-rtd-theme>=0.2,<0.3'
     ],
     'test': [
+        'coverage>=4.3.4,<5.0.0',
+        'coveralls>=1.1,<2.0',
+        'flake8>=3.3.0,<4.0.0',
         'pytest>=3.0.0,<4.0.0',
+        'pytest-cov>=2.4.0,<3.0.0',
         'pytest-mock>=1.5.0,<2.0.0',
     ],
+    'test:python_version >= "3.3"': [
+        'mypy-lang>=0.4.6,<0.5.0',
+    ],
 }
 
 classifiers = [

tox.ini

@@ -1,14 +1,21 @@
 [tox]
-envlist = {py27,py33,py34,pypy,pypy3}-django18, {py27,py34,py35,pypy}-django{19,110}, {py27,py34,py35,py36}-django111, coverage, docs, flake8, mypy
-; https://docs.djangoproject.com/en/dev/faq/install/#what-python-version-can-i-use-with-django
+envlist =
+    py27, py33, py34, py35, py36,
+    ; https://docs.djangoproject.com/en/dev/faq/install/#what-python-version-can-i-use-with-django
+    py27-django{18,19,110,111},
+    py33-django18,
+    py34-django{19,110,111},
+    py35-django{19,110,111},
+    py36-django111,
+    coverage, docs, flake8, mypy
 
 [travis]
 python =
-    2.7: py27-django{18,19,110,111}, coverage, docs, flake8
-    3.3: py33-django18
-    3.4: py34-django{19,110,111}
-    3.5: py35-django{19,110,111}, coverage, docs, flake8, mypy
-    3.6: py36-django111
+    2.7: py27, py27-django{18,19,110,111}, coverage, docs, flake8
+    3.3: py33, py33-django18
+    3.4: py34, py34-django{19,110,111}
+    3.5: py35, py35-django{19,110,111}, coverage, docs, flake8, mypy
+    3.6: py36, py36-django111
 
 [testenv]
 deps =
@@ -19,14 +26,11 @@ deps =
 commands =
     pip install -e .[test]
     pytest tests/core
-    python tests/django/runtests.py
+    django{18,19,110,111}: python tests/django/runtests.py
 passenv = CHANNELS_* TRAVIS TRAVIS_BRANCH TRAVIS_JOB_ID
 
 [testenv:coverage]
 deps =
-    coveralls
-    coverage
-    pytest-cov
     Django>=1.10,<1.11
 commands =
     pip install -e .[test]
@@ -43,11 +47,12 @@ commands =
     make html
 
 [testenv:flake8]
-deps = flake8
-commands = flake8 kawasemi/
+commands =
+    pip install -e .[test]
+    flake8 kawasemi/
 
 [testenv:mypy]
-deps = mypy-lang
 commands =
+    pip install -e .[test]
     mypy --py2 --silent-imports -m kawasemi
     mypy --silent-imports -m kawasemi