diff --git a/tests/test_utils_npy.py b/tests/test_utils_npy.py
index d48d4277b..338eea1b1 100644
--- a/tests/test_utils_npy.py
+++ b/tests/test_utils_npy.py
@@ -6,11 +6,11 @@ sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')
 from slic.utils.npy import *
 
 @pytest.mark.parametrize("start, stop, step, expected", [
-    (0, 5, 1, np.linspace(0, 5, 6)),                       # regular integer step
-    (5, 0, -1, np.linspace(5, 0, 6)),                      # reversed with negative step
-    (1, 2, 0.3, np.linspace(1, 2, 4)),                     # step doesn't divide evenly
-    (-2, 2, 1.5, np.linspace(-2, 2, 3)),                   # centered range
-    (2.5, 0.5, -0.4, np.linspace(2.5, 0.5, 6)),            # reversed float
+    (0, 5, 1, [0, 1, 2, 3, 4, 5]),                         
+    (5, 0, -1, [5, 4, 3, 2, 1, 0]),                        
+    (1, 2, 3/10, [1, 4/3, 5/3, 2]),                        
+    (-2, 2, 3/2, [-2, -2/3, 2/3, 2]),                      
+    (5/2, 1/2, -2/5, [5/2, 21/10, 17/10, 13/10, 9/10, 1/2])
 ])
 def test_nice_arange(start, stop, step, expected):
     np.testing.assert_allclose(nice_arange(start, stop, step), expected)