diff --git a/docs/changes.rst b/docs/changes.rst
index cbd995030..8c61dfa78 100644
--- a/docs/changes.rst
+++ b/docs/changes.rst
@@ -14,6 +14,7 @@ Pending
 * Dropped support for the Python 3.9, it has reached its end of life date.
 * Toggle tracking the toolbar's queries when using
   ``debug_toolbar.store.DatabaseStore`` with ``SKIP_TOOLBAR_QUERIES``.
+* Updated tox configuration to treat all warnings as errors.
 
 6.1.0 (2025-10-30)
 ------------------
diff --git a/tox.ini b/tox.ini
index e7058e0fd..9c1a157c6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -43,7 +43,7 @@ passenv=
     GITHUB_*
 setenv =
     PYTHONPATH = {toxinidir}
-    PYTHONWARNINGS = d
+    PYTHONWARNINGS = default,ignore:The RedirectsPanel is deprecated:DeprecationWarning
     DB_NAME = {env:DB_NAME:debug_toolbar}
     DB_USER = {env:DB_USER:debug_toolbar}
     DB_HOST = {env:DB_HOST:localhost}
@@ -51,7 +51,7 @@ setenv =
     DJANGO_SETTINGS_MODULE = tests.settings
 allowlist_externals = make
 pip_pre = True
-commands = python -b -W always -m coverage run -m django test -v2 {posargs:tests}
+commands = python -b -m coverage run -m django test -v2 {posargs:tests}
 
 
 [testenv:py{310,311,312,313,314}-dj{42,51,52,60,main}-{postgresql,psycopg3}]