diff --git a/dev-lang/spidermonkey/spidermonkey-128.3.0.ebuild b/dev-lang/spidermonkey/spidermonkey-128.3.0.ebuild
index a85726775523d..e0af1cd1f6ea2 100644
--- a/dev-lang/spidermonkey/spidermonkey-128.3.0.ebuild
+++ b/dev-lang/spidermonkey/spidermonkey-128.3.0.ebuild
@@ -449,6 +449,11 @@ src_test() {
 
 	cp "${FILESDIR}"/spidermonkey-${SLOT}-known-test-failures.txt "${T}"/known_test_failures.list || die
 
+	if use x86 ; then
+		echo "non262/Intl/DateTimeFormat/timeZone_version.js" >> "${T}"/known_test_failures.list
+		echo "test262/intl402/Locale/constructor-non-iana-canon.js" >> "${T}"/known_test_failures.list
+	fi
+
 	./mach jstests --exclude-file="${T}"/known_test_failures.list || die
 }