diff --git a/dev-python/pytest/pytest-5.4.3.ebuild b/dev-python/pytest/pytest-5.4.3.ebuild
index ccf148d84c1f0..7a531fe1ffb22 100644
--- a/dev-python/pytest/pytest-5.4.3.ebuild
+++ b/dev-python/pytest/pytest-5.4.3.ebuild
@@ -14,7 +14,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ppc ppc64 sparc x86"
+KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ppc ppc64 ~s390 sparc x86"
 IUSE="test"
 RESTRICT="!test? ( test )"