From 372f411b8ca76f85c0cc6cc4415d5bee2ca948e2 Mon Sep 17 00:00:00 2001
From: Ned Batchelder <ned@nedbatchelder.com>
Date: Sun, 29 Dec 2019 19:07:32 -0500
Subject: An environment for testing the tip of CPython

---
 tox.ini | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tox.ini b/tox.ini
index 184e9365..c65f8f8b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -50,6 +50,10 @@ commands =
 [testenv:py39]
 basepython = python3.9
 
+[testenv:tip]
+# For running against the tip of master of CPython.
+basepython = /usr/local/cpython/bin/python3.9
+
 [testenv:doc]
 # Build the docs so we know if they are successful.  We build twice: once with
 # -q to get all warnings, and once with -QW to get a success/fail status
-- 
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