diff --git a/CHANGES.rst b/CHANGES.rst
index 6119f3e..9bf9b9b 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,7 +5,9 @@ CHANGES
 4.4.1 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- As tests break with ``pillow >= 11``, for now force the tests to use an older
+  version.
+  (`#125 <https://github.com/zopefoundation/z3c.rml/issues/125>_`)
 
 
 4.4.0 (2023-08-23)
diff --git a/tox.ini b/tox.ini
index be8e53b..33a9d1e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,6 +14,7 @@ envlist =
 [testenv]
 usedevelop = true
 deps =
+    pillow < 11
 commands =
     zope-testrunner --test-path=src {posargs:-vc}
 extras =
@@ -49,6 +50,7 @@ allowlist_externals =
     mkdir
 deps =
     coverage
+    pillow < 11
 commands =
     mkdir -p {toxinidir}/parts/htmlcov
     coverage run -m zope.testrunner --test-path=src {posargs:-vc}