try to restore color to pytest

the problem here is that the color codes will come out in
jenkins runs.  see if jenkins maybe does something with that
(filters or maybe even gives us color)

Change-Id: I9c8660fa85fb216cae16e18b776f34b005d3ac51

1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index c9a769f..8b744d7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,7 +34,7 @@ usedevelop=
 # only use --dropfirst option if we're *not* using -n;
 # if -n is used, we're working in brand new DBs anyway
 setenv=
-    BASECOMMAND=python -m pytest --rootdir {toxinidir}
+    BASECOMMAND=python -m pytest {tty:--color=yes} --rootdir {toxinidir}
     WORKERS={env:TOX_WORKERS:-n4}
     sqla079: WORKERS=--dropfirst
     cov: COVERAGE={[testenv]cov_args}