diff --git a/testing/test_mark.py b/testing/test_mark.py
index 9b3e15b37e3..cf59baed986 100644
--- a/testing/test_mark.py
+++ b/testing/test_mark.py
@@ -418,6 +418,32 @@ def test_bar(self): pass
         items, rec = testdir.inline_genitems(p)
         self.assert_markers(items, test_foo=('a', 'b'), test_bar=('a',))
 
+
+    @pytest.mark.issue568
+    @pytest.mark.xfail(reason="markers smear on methods of base classes")
+    def test_mark_should_not_pass_to_siebling_class(self, testdir):
+        p = testdir.makepyfile("""
+            import pytest
+
+            class TestBase:
+                def test_foo(self):
+                    pass
+
+            @pytest.mark.b
+            class TestSub(TestBase):
+                pass
+
+
+            class TestOtherSub(TestBase):
+                pass
+
+        """)
+        items, rec = testdir.inline_genitems(p)
+        base_item, sub_item, sub_item_other = items
+        assert not hasattr(base_item.obj, 'b')
+        assert not hasattr(sub_item_other.obj, 'b')
+
+
     def test_mark_decorator_baseclasses_merged(self, testdir):
         p = testdir.makepyfile("""
             import pytest