diff --git a/polyfactory/factories/base.py b/polyfactory/factories/base.py
index e109d7fd..c6c96c08 100644
--- a/polyfactory/factories/base.py
+++ b/polyfactory/factories/base.py
@@ -239,10 +239,7 @@ class Foo(ModelFactory[MyModel]):  # <<< MyModel
         generic_args: Sequence[type[T]] = [
             arg for factory_base in factory_bases for arg in get_args(factory_base) if not isinstance(arg, TypeVar)
         ]
-        if len(generic_args) != 1:
-            return None
-
-        return generic_args[0]
+        return None if len(generic_args) != 1 else generic_args[0]
 
     @classmethod
     def _get_sync_persistence(cls) -> SyncPersistenceProtocol[T]: