diff --git a/lib/galaxy/tool_util/cwl/schema.py b/lib/galaxy/tool_util/cwl/schema.py
index 03370b03d2ba..884fbc5c5d34 100644
--- a/lib/galaxy/tool_util/cwl/schema.py
+++ b/lib/galaxy/tool_util/cwl/schema.py
@@ -44,6 +44,7 @@ def loading_context(self):
         loading_context.strict = self._strict
         loading_context.do_validate = self._validate
         loading_context.loader = self.raw_document_loader
+        loading_context.enable_dev = True
         loading_context.do_update = True
         loading_context.relax_path_checks = True
         return loading_context