diff --git a/pytest.ini b/pytest.ini
index 94515aaf..3d30458f 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -21,4 +21,7 @@ filterwarnings=
 	# python/cpython#100750
 	ignore:'encoding' argument not specified::platform
 
+	# pypa/build#615
+	ignore:'encoding' argument not specified:EncodingWarning:build.env
+
 	## end upstream