diff --git a/leapp/models/fields/__init__.py b/leapp/models/fields/__init__.py
index 31c09168d..5e24be44d 100644
--- a/leapp/models/fields/__init__.py
+++ b/leapp/models/fields/__init__.py
@@ -46,7 +46,7 @@ def __init__(self, default=None, help=None):  # noqa; pylint: disable=redefined-
         self._nullable = False
         self._default = default
 
-        if type(self) == Field:  # noqa;
+        if type(self) is Field:
             raise ModelMisuseError("Do not use this type directly.")
 
     def _validate_model_value(self, value, name):