diff --git a/skimage/morphology/greyreconstruct.py b/skimage/morphology/greyreconstruct.py
index bf3caffe..9e447800 100644
--- a/skimage/morphology/greyreconstruct.py
+++ b/skimage/morphology/greyreconstruct.py
@@ -133,7 +133,7 @@ def reconstruction(seed, mask, method='dilation', selem=None, offset=None):
     if offset == None:
         if not all([d % 2 == 1 for d in selem.shape]):
             ValueError("Footprint dimensions must all be odd")
-        offset = np.array([d / 2 for d in selem.shape])
+        offset = np.array([d // 2 for d in selem.shape])
     # Cross out the center of the selem
     selem[[slice(d, d + 1) for d in offset]] = False
 
diff --git a/skimage/morphology/tests/test_reconstruction.py b/skimage/morphology/tests/test_reconstruction.py
index 74f61b9f..8e40ac67 100644
--- a/skimage/morphology/tests/test_reconstruction.py
+++ b/skimage/morphology/tests/test_reconstruction.py
@@ -15,19 +15,19 @@ from skimage.morphology.greyreconstruct import reconstruction
 
 def test_zeros():
     """Test reconstruction with image and mask of zeros"""
-    assert np.all(reconstruction(np.zeros((5, 7)), np.zeros((5, 7))) == 0)
+    assert_close(reconstruction(np.zeros((5, 7)), np.zeros((5, 7))), 0)
 
 
 def test_image_equals_mask():
     """Test reconstruction where the image and mask are the same"""
-    assert np.all(reconstruction(np.ones((7, 5)), np.ones((7, 5))) == 1)
+    assert_close(reconstruction(np.ones((7, 5)), np.ones((7, 5))), 1)
 
 
 def test_image_less_than_mask():
     """Test reconstruction where the image is uniform and less than mask"""
     image = np.ones((5, 5))
     mask = np.ones((5, 5)) * 2
-    assert np.all(reconstruction(image, mask) == 1)
+    assert_close(reconstruction(image, mask), 1)
 
 
 def test_one_image_peak():
@@ -35,7 +35,7 @@ def test_one_image_peak():
     image = np.ones((5, 5))
     image[2, 2] = 2
     mask = np.ones((5, 5)) * 3
-    assert np.all(reconstruction(image, mask) == 2)
+    assert_close(reconstruction(image, mask), 2)
 
 
 def test_two_image_peaks():
@@ -60,13 +60,13 @@ def test_two_image_peaks():
                          [1, 1, 1, 1, 1, 3, 3, 3],
                          [1, 1, 1, 1, 1, 3, 3, 3],
                          [1, 1, 1, 1, 1, 3, 3, 3]])
-    assert np.all(reconstruction(image, mask) == expected)
+    assert_close(reconstruction(image, mask), expected)
 
 
 def test_zero_image_one_mask():
     """Test reconstruction with an image of all zeros and a mask that's not"""
     result = reconstruction(np.zeros((10, 10)), np.ones((10, 10)))
-    assert np.all(result == 0)
+    assert_close(result, 0)
 
 
 def test_fill_hole():