2 files changed, 2 insertions, 1 deletions

diff --git a/setup.cfg b/setup.cfg
index 5e19bd2b..f3dd4b61 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [tool:pytest]
-addopts = -q
+addopts = -q -n3
 
 [pep8]
 # E265 block comment should start with '# '
diff --git a/tox.ini b/tox.ini
index a7b320b6..44c9914c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,6 +11,7 @@ usedevelop = True
 deps =
     # https://requires.io/github/nedbat/coveragepy/requirements/
     git+https://github.com/nedbat/pytest.git@bug2038#egg=pytest==0.0
+    pytest-xdist==1.15.0
     pip==8.1.2
     mock==2.0.0
     PyContracts==1.7.9