diff --git a/skimage/morphology/tests/test_selem.py b/skimage/morphology/tests/test_selem.py
index 545cb0d4..ebefdfa1 100644
--- a/skimage/morphology/tests/test_selem.py
+++ b/skimage/morphology/tests/test_selem.py
@@ -110,7 +110,7 @@ class TestSElem():
                                    [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
                                    [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
                                    [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
-                                   [0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0]], dtype=uint8)
+                                   [0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0]], dtype=np.uint8)
         actual_mask1 = selem.ellipse(5, 3)
         expected_mask2 = np.array([[1, 1, 1],
                                    [1, 1, 1],