diff --git a/setup.py b/setup.py
index 02466317..2884e591 100644
--- a/setup.py
+++ b/setup.py
@@ -43,7 +43,7 @@
         "Framework :: Wagtail",
         "Framework :: Wagtail :: 2",
     ],
-    install_requires=["Django>=2.2,<4.1", "Wagtail>=2.11,<2.17", "polib>=1.1,<2.0"],
+    install_requires=["Django>=2.2,<4.1", "Wagtail>=2.11,<3.1", "polib>=1.1,<2.0"],
     extras_require={
         "testing": ["dj-database-url==0.5.0", "freezegun==1.1.0"],
         "documentation": [
diff --git a/tox.ini b/tox.ini
index c74704fe..d5678392 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ usedevelop = True
 envlist =
     python{3.7,3.8,3.9}-django{2.2}-wagtail{2.11,2.12,2.13}-{sqlite,postgres}
     python{3.7,3.8,3.9}-django{3.2}-wagtail{2.14,2.15,2.16}-{sqlite,postgres}
-    python{3.7,3.8,3.9,3.10}-django{4.0}-wagtail{2.16,main}-{sqlite,postgres}
+    python{3.7,3.8,3.9,3.10}-django{4.0}-wagtail{2.16,main,sync}-{sqlite,postgres}
     python{3.10}-django{3.2,main}-wagtail{2.15,2.16,main}-{sqlite,postgres}
 
 [flake8]
@@ -16,7 +16,7 @@ exclude = migrations,node_modules
 
 [testenv]
 install_command = pip install -e ".[testing]" -U {opts} {packages}
-commands = coverage run testmanage.py test --deprecation all {posargs: -v 2}
+commands = coverage run testmanage.py test {posargs: -v 2}
 
 basepython =
     python3.7: python3.7
@@ -39,6 +39,7 @@ deps =
     wagtail2.15: wagtail>=2.15,<2.16
     wagtail2.16: wagtail>=2.16,<2.17
     wagtailmain: git+https://github.com/wagtail/wagtail.git
+    wagtailsync: git+https://github.com/wagtail/wagtail.git@feature/sync-tree-unpublish-cascade#egg=wagtail
 
     # Pinned to work around UTC connection error
     # https://stackoverflow.com/questions/68024060/assertionerror-database-connection-isnt-set-to-utc