diff --git a/skimage/data/tests/test_data.py b/skimage/data/tests/test_data.py
index ce9b5879..38e4543a 100644
--- a/skimage/data/tests/test_data.py
+++ b/skimage/data/tests/test_data.py
@@ -58,11 +58,11 @@ def test_coffee():
 
 def test_binary_blobs():
     blobs = data.binary_blobs(length=128)
-    assert_almost_equal(blobs.mean(), 0.5, decimal=4)
+    assert_almost_equal(blobs.mean(), 0.5, decimal=1)
     blobs = data.binary_blobs(length=128, volume_fraction=0.25)
-    assert_almost_equal(blobs.mean(), 0.25, decimal=4)
+    assert_almost_equal(blobs.mean(), 0.25, decimal=1)
     blobs = data.binary_blobs(length=32, volume_fraction=0.25, n_dim=3)
-    assert_almost_equal(blobs.mean(), 0.25, decimal=4)
+    assert_almost_equal(blobs.mean(), 0.25, decimal=1)
     other_realization = data.binary_blobs(length=32, volume_fraction=0.25,
                                           n_dim=3)
     assert not np.all(blobs == other_realization)