1 files changed, 1 insertions, 0 deletions
diff --git a/tox.ini b/tox.ini
index e1d59611b..18cbc41ff 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,3 +9,4 @@ envlist = py36
 [testenv]
 commands = pytest
 sitepackages = True
+passenv = BST_FORCE_BACKEND, PYTEST_ADDOPTS