diff --git a/tox.ini b/tox.ini
index f5336da08..72f95b711 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,6 +11,7 @@ setenv =
   VIRTUAL_ENV={envdir}
   PYTHONDONTWRITEBYTECODE = 1
   OS_TEST_PATH=./ironic_python_agent/tests/unit
+  OS_LOG_CAPTURE={env:OS_LOG_CAPTURE:true}
   LANGUAGE=en_US
   LC_ALL=en_US.utf-8
 deps =