diff --git a/src/sage/geometry/lattice_polytope.py b/src/sage/geometry/lattice_polytope.py
index cdf2c374e9f..1cd9f578113 100644
--- a/src/sage/geometry/lattice_polytope.py
+++ b/src/sage/geometry/lattice_polytope.py
@@ -3138,7 +3138,7 @@ def normal_form(self, algorithm="palp_native", permutation=False):
             M( 12, -1, -9, -6,  6),
             M( 12, -1, -6, -3,  3)
             in 5-d lattice M
-            sage: P.normal_form(algorithm="palp_modified")  # long time (22s)           # needs sage.groups
+            sage: P.normal_form(algorithm="palp_modified")  # not tested (22s; MemoryError on 32 bit), needs sage.groups
             M(  6,  0,  0,  0,  0),
             M( -6,  0,  0,  0,  0),
             M(  0,  1,  0,  0,  0),