1 files changed, 1 insertions, 1 deletions
diff --git a/scripts-dev/mypy_synapse_plugin.py b/scripts-dev/mypy_synapse_plugin.py
index 509047b41b..a15c3c005c 100644
--- a/scripts-dev/mypy_synapse_plugin.py
+++ b/scripts-dev/mypy_synapse_plugin.py
@@ -360,7 +360,7 @@ def is_cacheable(
         # For a type alias, check if the underlying real type is cachable.
         return is_cacheable(mypy.types.get_proper_type(rt), signature, verbose)
 
-    elif isinstance(rt, UninhabitedType) and rt.is_noreturn:
+    elif isinstance(rt, UninhabitedType):
         # There is no return value, just consider it cachable. This is only used
         # in tests.
         return True, None