From 5305f5895858c0f1f229c800c972de28283825ca Mon Sep 17 00:00:00 2001
From: Iuri de Silvio <iurisilvio@gmail.com>
Date: Sun, 7 Jan 2024 08:02:15 -0300
Subject: [PATCH] Add note about tox>=4

---
 README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README.md b/README.md
index 7b97289..6732455 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,10 @@
 
 tox-factor enables running a subset of tox test envs, based on factor matching.
 
+> [!WARNING]  
+> tox-factor is compatible only with `tox<4`.
+> 
+> `tox>=4` include a `-f` flag built-in, tox-factor is not required. 
 
 ## Okay, but what does that *actually* mean?