diff --git a/graphene/__init__.py b/graphene/__init__.py
index e0f6c51a..2884939c 100644
--- a/graphene/__init__.py
+++ b/graphene/__init__.py
@@ -66,6 +66,7 @@ __all__ = [
     "Date",
     "DateTime",
     "Time",
+    "Decimal",
     "JSONString",
     "UUID",
     "List",
diff --git a/graphene/types/tests/test_decimal.py b/graphene/types/tests/test_decimal.py
index e4c08ffc..abc4a6c4 100644
--- a/graphene/types/tests/test_decimal.py
+++ b/graphene/types/tests/test_decimal.py
@@ -40,4 +40,4 @@ def test_bad_decimal_query():
 
     result = schema.execute("""{ decimal(input: "%s") }""" % not_a_decimal)
     assert len(result.errors) == 1
-    assert result.data == None
+    assert result.data is None