From 74994975c77dd4d5a56b2b90b60ff2f697fb8a76 Mon Sep 17 00:00:00 2001
From: Matthias Maier <tamiko@43-1.org>
Date: Thu, 28 Mar 2024 19:15:40 -0500
Subject: [PATCH] Test grid/closest_point: guard against roundoff error

---
 tests/grid/closest_point.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tests/grid/closest_point.cc b/tests/grid/closest_point.cc
index 9ab7ad648a..0413c08509 100644
--- a/tests/grid/closest_point.cc
+++ b/tests/grid/closest_point.cc
@@ -24,7 +24,8 @@ test(const ReferenceCell &reference_cell,
   for (const unsigned int vertex_no : reference_cell.vertex_indices())
     AssertThrow(distance_square <=
                   p.distance_square(
-                    reference_cell.template vertex<dim>(vertex_no)),
+                    reference_cell.template vertex<dim>(vertex_no)) *
+                    (1. + 2. * std::numeric_limits<double>::epsilon()),
                 ExcInternalError());
 
   // Also generate a lot of points in the unit cell - we should be closer than
-- 
2.39.5