diff --git a/tox.ini b/tox.ini
index 702cca90..0e7bf2d5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,6 +6,7 @@ envlist =
     py{38,39,310,311}-django41{-svg,}
     py{38,39,310,311,312}-django42{-svg,}
     py{310,311,312}-django50{-svg,}
+    py{310,311,312}-django51{-svg,}
 skip_missing_interpreters = True
 
 [gh-actions]
@@ -30,6 +31,7 @@ deps =
     django41: Django<4.2
     django42: Django<4.3
     django50: Django<5.1
+    django51: Django>=5.1a1,<5.2
     testfixtures
 commands =
     python -Wd {envbindir}/django-admin test {posargs}