Move 3.6-syntaxed test to test_next_gen.py

tests/test_make.py

@@ -21,7 +21,7 @@ from hypothesis.strategies import booleans, integers, lists, sampled_from, text
 import attr
 
 from attr import _config
-from attr._compat import PY2, PY36, PY310, ordered_dict
+from attr._compat import PY2, PY310, ordered_dict
 from attr._make import (
     Attribute,
     Factory,
@@ -429,41 +429,6 @@ class TestTransformAttrs(object):
 
         assert d.x == d.xx()
 
-    @pytest.mark.skipif(not PY36, reason="NG is 3.6+-only")
-    def test_mro_ng(self):
-        """
-        Attributes and methods are looked up the same way in NG by default.
-
-        See #428
-        """
-
-        @attr.define
-        class A:
-
-            x: int = 10
-
-            def xx(self):
-                return 10
-
-        @attr.define
-        class B(A):
-            y: int = 20
-
-        @attr.define
-        class C(A):
-            x: int = 50
-
-            def xx(self):
-                return 50
-
-        @attr.define
-        class D(B, C):
-            pass
-
-        d = D()
-
-        assert d.x == d.xx()
-
     def test_inherited(self):
         """
         Inherited Attributes have `.inherited` True, otherwise False.

tests/test_next_gen.py

@@ -333,3 +333,37 @@ class TestNextGen:
         # Validates
         with pytest.raises(ValueError, match="must be >=10"):
             inst.x = "9"
+
+    def test_mro_ng(self):
+        """
+        Attributes and methods are looked up the same way in NG by default.
+
+        See #428
+        """
+
+        @attr.define
+        class A:
+
+            x: int = 10
+
+            def xx(self):
+                return 10
+
+        @attr.define
+        class B(A):
+            y: int = 20
+
+        @attr.define
+        class C(A):
+            x: int = 50
+
+            def xx(self):
+                return 50
+
+        @attr.define
+        class D(B, C):
+            pass
+
+        d = D()
+
+        assert d.x == d.xx()