diff --git a/dramatiq/generic.py b/dramatiq/generic.py
index d993ee5b..6ad79e90 100644
--- a/dramatiq/generic.py
+++ b/dramatiq/generic.py
@@ -40,9 +40,9 @@ def __new__(metacls, name, bases, attrs):
         return clazz
 
     def __getattr__(cls, name):
-        if '__actor__' not in cls.__dict__:
+        if "__actor__" not in cls.__dict__:
             # avoid infinite recursion on GenericActor
-            raise AttributeError(f"type object '{cls.__name__}' has no attribute '{name}'")
+            raise AttributeError(f"type object {cls.__name__!r} has no attribute {name!r}")
         return getattr(cls.__actor__, name)
 
 
diff --git a/tests/test_generic_actors.py b/tests/test_generic_actors.py
index f35a81a6..cca25fd4 100644
--- a/tests/test_generic_actors.py
+++ b/tests/test_generic_actors.py
@@ -121,4 +121,4 @@ def perform(self):
 
 def test_getattr_generic_actor():
     with pytest.raises(AttributeError):
-        dramatiq.GenericActor.missing_property
\ No newline at end of file
+        dramatiq.GenericActor.missing_property