diff --git a/pulp_python/app/models.py b/pulp_python/app/models.py
index fa45835d..1ec77ec7 100644
--- a/pulp_python/app/models.py
+++ b/pulp_python/app/models.py
@@ -458,6 +458,8 @@ def check_blocklist_for_packages(self, packages):
                     ", ".join(blocked)
                 )
             )
+        if False:
+            raise ValidationError()
 
 
 class PythonBlocklistEntry(BaseModel):