diff --git a/django/utils/functional.py b/django/utils/functional.py
index 666651bd2e..2771851eae 100644
--- a/django/utils/functional.py
+++ b/django/utils/functional.py
@@ -144,10 +144,7 @@ def lazy(func, *resultclasses):
             return bytes(func(*self.__args, **self.__kw))
 
         def __cast(self):
-            if self._delegate_bytes:
-                return self.__bytes_cast()
-            else:
-                return func(*self.__args, **self.__kw)
+            return func(*self.__args, **self.__kw)
 
         def __str__(self):
             # object defines __str__(), so __prepare_class__() won't overload
diff --git a/tests/utils_tests/test_functional.py b/tests/utils_tests/test_functional.py
index f8763b3db6..cc4409d893 100644
--- a/tests/utils_tests/test_functional.py
+++ b/tests/utils_tests/test_functional.py
@@ -242,6 +242,10 @@ class FunctionalTests(SimpleTestCase):
         lazy_value = lazy(lambda: [1], str, list)()
         self.assertEqual(str(lazy_value), "[1]")
 
+    def test_lazy_str_cast_mixed_bytes_result_types(self):
+        lazy_value = lazy(lambda: [1], bytes, list)()
+        self.assertEqual(str(lazy_value), "[1]")
+
     def test_classproperty_getter(self):
         class Foo:
             foo_attr = 123