diff --git a/tox.ini b/tox.ini
index 5977c73a372f23e47931979e4a3d4eea01f0c184..1e962ca49d9252c275ee526d2c4860cb580c25d7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,5 @@
 [tox]
 envlist = py38
-isolated_build = True
 minversion = 3.18.0
 
 [testenv]