diff --git a/tox.ini b/tox.ini
index ed2f8f9ad2007e11acacc02d1cc50541b0982838..5c95129343d80cf2b7cedb3124a585bdbfdc83ae 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,6 +8,7 @@ max-line-length = 120
 ban-relative-imports = true
 
 [testenv]
+passenv = DATABASE_URI_TEST
 deps =
     coverage
     flake8