From a3c27913acb866fb5aa27ea0cfa6aa8417c9b6e7 Mon Sep 17 00:00:00 2001
From: Conor MacBride <conor@macbride.me>
Date: Sun, 9 Nov 2025 12:58:02 +0000
Subject: [PATCH] ensure requirements pinned in tox.ini are not overridden

---
 tox.ini | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tox.ini b/tox.ini
index dd717bff..72affc86 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,8 @@ setenv =
     mpldev: PIP_EXTRA_INDEX_URL = https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
 changedir = .tmp/{envname}
 description = run tests
+constrain_package_deps =
+    !mpldev-!pytestdev: true
 deps =
     pytest-xdist
     mpl20: matplotlib==2.0.*