diff --git a/skimage/filter/tests/test_thresholding.py b/skimage/filter/tests/test_thresholding.py
index 8278fa6f..97d3d9e3 100644
--- a/skimage/filter/tests/test_thresholding.py
+++ b/skimage/filter/tests/test_thresholding.py
@@ -74,12 +74,12 @@ class TestSimpleImage():
 
 def test_otsu_camera_image():
     camera = skimage.img_as_ubyte(data.camera())
-    assert threshold_otsu(camera) == 87
+    assert 86 < threshold_otsu(camera) < 88
 
 
 def test_otsu_coins_image():
     coins = skimage.img_as_ubyte(data.coins())
-    assert threshold_otsu(coins) == 107
+    assert 106 < threshold_otsu(coins) < 108
 
 
 def test_otsu_coins_image_as_float():
@@ -89,7 +89,7 @@ def test_otsu_coins_image_as_float():
 
 def test_otsu_lena_image():
     lena = skimage.img_as_ubyte(data.lena())
-    assert threshold_otsu(lena) == 141
+    assert 140 < threshold_otsu(lena) < 142
 
 
 if __name__ == '__main__':