diff --git a/dev-python/werkzeug/werkzeug-2.0.0.ebuild b/dev-python/werkzeug/werkzeug-2.0.0.ebuild
index b846c49b53958..d9a91a7036a52 100644
--- a/dev-python/werkzeug/werkzeug-2.0.0.ebuild
+++ b/dev-python/werkzeug/werkzeug-2.0.0.ebuild
@@ -36,5 +36,7 @@ DEPEND="
 distutils_enable_tests pytest
 
 python_test() {
+	# the default portage tempdir is too long for AF_UNIX sockets
+	local -x TMPDIR=/tmp
 	epytest -p no:httpbin tests
 }