https://github.com/simplistix/sybil/commit/b1c31ce0818cfa7953a61b3b391a88cd5620f9dd

From b1c31ce0818cfa7953a61b3b391a88cd5620f9dd Mon Sep 17 00:00:00 2001
From: Chris Withers <chris@withers.org>
Date: Thu, 9 Jul 2026 08:51:56 +0100
Subject: [PATCH] Follow testfixtures' compare_text/compare_dict move to
 comparers module

--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dev = [
     "pytest-cov>=6",
     "ruff>=0.15.7",
     "seedir",
-    "testfixtures>=11",
+    "testfixtures>=12.0.0",
     "types-PyYAML",
 ]
 docs = [
--- a/tests/test_lexing.py
+++ b/tests/test_lexing.py
@@ -2,7 +2,7 @@
 
 import pytest
 from testfixtures import ShouldRaise, compare
-from testfixtures.comparison import compare_text, compare_dict
+from testfixtures.comparers import compare_text, compare_dict
 
 from sybil import Lexeme
 from sybil.parsers.abstract.lexers import BlockLexer, LexingException