From cc42c66f1e41bbea49f36d667dc5ca2d1c97ce31 Mon Sep 17 00:00:00 2001
From: Christoph Lehner <christoph@lhnr.de>
Date: Tue, 31 Oct 2023 17:59:12 +0100
Subject: [PATCH] cleanup

---
 tests/ad/ad.py | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/tests/ad/ad.py b/tests/ad/ad.py
index 22531064..974fd87a 100755
--- a/tests/ad/ad.py
+++ b/tests/ad/ad.py
@@ -42,11 +42,7 @@
         eps = prec.eps**0.5
         g.message(f"Numerical derivatives with eps = {eps}")
         for var in [a1, a2, b1, b2, x, t1]:
-            if isinstance(var.value, g.lattice):
-                lt = g.lattice(var.value)
-            else:
-                lt = var.value.copy()
-            rng.cnormal(lt)
+            lt = rng.cnormal(var.value.new())
             var.value += lt * eps
             v1 = c(with_gradients=False)
             var.value -= 2 * lt * eps