diff --git a/tox.ini b/tox.ini
index 0a27a0a17..8377eae8f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,7 +27,10 @@ commands =
 
 [testenv:checksyntax]
 commands =
-    openstack-doc-test --check-syntax {posargs}
+    # WADLs using entity files are not properly handled by
+    # openstack-doc-test, we therefore have to check all files that
+    # are in the tree for any syntax issues.
+    openstack-doc-test --check-syntax --force {posargs}
     # Check that .po and .pot files are valid:
     bash -c "find api* -type f -regex '.*\.pot?' -print0|xargs -0 -n 1 msgfmt --check-format -o /dev/null"