use pytest-dist for make test3

test-requirements.txt

@@ -6,6 +6,8 @@ mock<=2.0.0
 requests-mock
 coverage
 pytest
+pytest-cov
+pytest-xdist
 Cheetah3
 psycopg2-binary
 python-multilib

tox.ini

@@ -36,7 +36,7 @@ commands_pre =
 [testenv:py3]
 deps =
     -r{toxinidir}/test-requirements.txt
-allowlist_externals = coverage3
+allowlist_externals = coverage3,pytest
 setenv = 
     {[testenv]setenv}
     PYTHONPATH=.:plugins/hub/.:plugins/builder/.:plugins/cli/.:cli/.:www/lib
@@ -44,9 +44,7 @@ commands_pre =
     {[testenv]commands_pre}
     coverage3 erase --rcfile .coveragerc3
 commands = 
-    coverage3 run --rcfile .coveragerc3 --source . -m pytest {posargs}
-    coverage3 report --rcfile .coveragerc3
-    coverage3 html -d {toxinidir}/htmlcov/py3 --rcfile .coveragerc3
+    pytest -n auto --cov --cov-config .coveragerc3 --cov-report=html
 
 [testenv:py2]
 deps =