diff --git a/testing/test_capture.py b/testing/test_capture.py
index 8e594a3f8..043716c99 100644
--- a/testing/test_capture.py
+++ b/testing/test_capture.py
@@ -822,6 +822,7 @@ def test_dontreadfrominput():
     from _pytest.capture import DontReadFromInput
 
     f = DontReadFromInput()
+    assert f.buffer is f
     assert not f.isatty()
     pytest.raises(IOError, f.read)
     pytest.raises(IOError, f.readlines)
@@ -831,20 +832,6 @@ def test_dontreadfrominput():
     f.close()  # just for completeness
 
 
-def test_dontreadfrominput_buffer_python3():
-    from _pytest.capture import DontReadFromInput
-
-    f = DontReadFromInput()
-    fb = f.buffer
-    assert not fb.isatty()
-    pytest.raises(IOError, fb.read)
-    pytest.raises(IOError, fb.readlines)
-    iter_f = iter(f)
-    pytest.raises(IOError, next, iter_f)
-    pytest.raises(ValueError, fb.fileno)
-    f.close()  # just for completeness
-
-
 @pytest.fixture
 def tmpfile(testdir):
     f = testdir.makepyfile("").open("wb+")