diff --git a/.ci/py3_sources.txt b/.ci/py3_sources.txt
index 75546357121..69f7f69dc08 100644
--- a/.ci/py3_sources.txt
+++ b/.ci/py3_sources.txt
@@ -1,5 +1,6 @@
 lib/galaxy/util/
 lib/galaxy/jobs/runners/util/
+lib/galaxy/tools/cwl/
 lib/galaxy/tools/parser/
 lib/galaxy/tools/lint.py
 lib/galaxy/tools/lint_util.py