diff --git a/utilities.py b/utilities.py
index c8bde8a3b7baf9e034541188c01b6e73e3bfc00e..e542fb02fef5ecb5c2e1fdbec3af7b590f1067d9 100644
--- a/utilities.py
+++ b/utilities.py
@@ -11,7 +11,7 @@ from pytest import approx
 # {{{ arrays
 
 def compare_arrays(a, b):
-    assert a == approx(b, rel=1e-5, abs=2e-5)
+    assert a == approx(b, rel=1e-12, abs=1e-14)
 
 
 def random_array_on_device(queue, *shape):