diff --git a/python/fluxqueue/context.py b/python/fluxqueue/context.py
index 9ce638c..6a87fbd 100644
--- a/python/fluxqueue/context.py
+++ b/python/fluxqueue/context.py
@@ -76,7 +76,12 @@ def __init_subclass__(cls) -> None:
         if cls.__name__ == "_Context":
             raise ValueError("Context subclass cannot be named '_Context'")
 
-        if not cls.__fluxqueue_context__ or cls.__fluxqueue_context__ == "_Context":
+        if cls.__fluxqueue_context__ == "_Context":
+            raise ValueError(
+                f"'__fluxqueue_context__' on {cls.__name__} cannot be named '_Context'"
+            )
+
+        if not cls.__fluxqueue_context__:
             cls.__fluxqueue_context__ = cls.__name__