From 4bf041bc0c7daf28948183c975f5f437dec2c78e Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Sun, 23 Jun 2024 09:18:50 -0700
Subject: [PATCH] src/sage/doctest/external.py: mathics is not external

---
 src/sage/doctest/external.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/sage/doctest/external.py b/src/sage/doctest/external.py
index ceec70230d0..aa158c76671 100644
--- a/src/sage/doctest/external.py
+++ b/src/sage/doctest/external.py
@@ -356,7 +356,9 @@ def external_features():
     import sage.features.ffmpeg
     yield from sage.features.ffmpeg.all_features()
     import sage.features.interfaces
-    yield from sage.features.interfaces.all_features()
+    for feature in sage.features.interfaces.all_features():
+        if feature.name != 'mathics':
+            yield feature
     from sage.features.mip_backends import CPLEX, Gurobi
     yield CPLEX()
     yield Gurobi()
@@ -398,7 +400,6 @@ class AvailableSoftware():
          'magma',
          'maple',
          'mathematica',
-         'mathics',
          'matlab',
          'octave',
          'pdflatex',