setup.py: Add pytest-xdist dependency

This allows running tests in parallel:

	./setup.py test --addopts "-n auto"

1 files changed, 2 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 4d06c87f7..69a78a1d3 100755
--- a/setup.py
+++ b/setup.py
@@ -182,5 +182,7 @@ setup(name='BuildStream',
                      'pytest-env',
                      'pytest-pep8',
                      'pytest-cov',
+                     # Provide option to run tests in parallel, less reliable
+                     'pytest-xdist',
                      'pytest >= 3.1.0'],
       zip_safe=False)