diff --git a/tox.ini b/tox.ini
index 4e2fa48..5e4562d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,10 +15,13 @@ deps = -r{toxinidir}/test-requirements.txt
 [testenv:linters]
 whitelist_externals = bash
 commands =
-  bash -c "find {toxinidir}        \
-            \( -name .tox -prune \)         \
-            -o -type f -name '*.yaml'       \
+  bash -c "find {toxinidir} \
+            \( -name .tox -prune \) \
+            -o -type f -name '*.yaml' \
             -print0 | xargs -0 yamllint"
+  bash -c "find {toxinidir} \
+            -type f -name '*.xml' \
+            -print0 | xargs -0 xmllint --noout"
 
 [testenv:venv]
 commands = {posargs}