setup.py: Specify minimum required version of pytest-cov plugin

This causes the new artifact tests to pass (unless you happened
to already have a recent enough version of pytest-cov, in which case
you didn't notice the breakage).

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index 615f8ca9f..0be02dfa1 100755
--- a/setup.py
+++ b/setup.py
@@ -269,7 +269,7 @@ setup(name='BuildStream',
                      'pytest-env',
                      'pytest-pep8',
                      'pytest-pylint',
-                     'pytest-cov',
+                     'pytest-cov >= 2.5.0',
                      # Provide option to run tests in parallel, less reliable
                      'pytest-xdist',
                      'pytest >= 3.1.0',