diff --git a/tox.ini b/tox.ini
index 464314c..e08829c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,9 +5,9 @@ allowlist_external = /usr/bin/env
 envlist = py3
 
 [testenv]
-passenv = OUTPUT
+passenv = OUTPUT REQUIRE_VALID_TONE
 deps =
-    dzcb~=0.3.0
+    dzcb~=0.3.2
 commands =
     python {toxinidir}/input/generate_all.py