Fix coverage tox venv6.10.0

We need to configure tox to actually run coverage or we get no data
for coverage to combine.

Change-Id: I6dc1601e628ac1090ce7a277c2be4b97f8577058

1 files changed, 2 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index e6b664c..7e6ba9f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -39,6 +39,8 @@ commands =
 
 [testenv:cover]
 basepython = python3
+setenv =
+    PYTHON=coverage run --source oslo_config --parallel-mode
 commands =
   coverage erase
   {[testenv]commands}