1 files changed, 14 insertions, 0 deletions
diff --git a/numpy/lib/tests/test_function_base.py b/numpy/lib/tests/test_function_base.py
index 27e7302ce..fcf89cb90 100644
--- a/numpy/lib/tests/test_function_base.py
+++ b/numpy/lib/tests/test_function_base.py
@@ -1919,6 +1919,20 @@ class TestMedian(TestCase):
         assert_almost_equal(np.median(x2), 2)
         assert_allclose(np.median(x2, axis=0), x)
 
+    def test_subclass(self):
+        # gh-3846
+        class MySubClass(np.ndarray):
+            def __new__(cls, input_array, info=None):
+                obj = np.asarray(input_array).view(cls)
+                obj.info = info
+                return obj
+
+            def mean(self, axis=None, dtype=None, out=None):
+                return -7
+
+        a = MySubClass([1,2,3])
+        assert_equal(np.median(a), -7)
+
     def test_extended_axis(self):
         o = np.random.normal(size=(71, 23))
         x = np.dstack([o] * 10)