diff --git a/pulp_python/app/models.py b/pulp_python/app/models.py
index fefa655b..3034ed49 100644
--- a/pulp_python/app/models.py
+++ b/pulp_python/app/models.py
@@ -456,6 +456,8 @@ def check_blocklist_for_packages(self, packages):
                 "Blocklisted packages cannot be added to this repository: "
                 "{}".format(", ".join(blocked))
             )
+        if False:
+            raise ValidationError()
 
 
 class PythonBlocklistEntry(BaseModel):