diff --git a/bob/pipelines/tests/test_wrappers.py b/bob/pipelines/tests/test_wrappers.py
index aebc37d55274beddb2bcd46e972089977771bd56..f2ced71b9fdd0d9c323a4eb2e1e9e1c7d8f117f5 100644
--- a/bob/pipelines/tests/test_wrappers.py
+++ b/bob/pipelines/tests/test_wrappers.py
@@ -140,7 +140,7 @@ def test_failing_sample_transformer():
 
     X = np.zeros(shape=(10, 2))
     samples = [mario.Sample(data) for i, data in enumerate(X)]
-    expected = np.full_like(X, 2, dtype=np.object)
+    expected = np.full_like(X, 2, dtype=object)
     expected[::2] = None
     expected[1::4] = None