diff --git a/tox.ini b/tox.ini
index ed8108d..c9f5aed 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,7 @@ isolated_build = True
 envlist = py{38}-pydantic{1,2}-pysimdjson{2,3,4,5,6},\
           py{39,310}-pydantic{1,2}-pysimdjson{3,4,5,6},\
           py{311}-pydantic{1,2}-pysimdjson{3,5,6},\
-          py{312}-pydantic{1,2}-pysimdjson{3,6}
+          py{312}-pydantic{1,2}-pysimdjson{6}
 toxworkdir = {env:TOXDIR:.tox}
 
 labels =