diff --git a/ext/date/tests/bug77243-001.phpt b/ext/date/tests/bug77243-001.phpt
index e52b4530716c5..b347d033429e0 100644
--- a/ext/date/tests/bug77243-001.phpt
+++ b/ext/date/tests/bug77243-001.phpt
@@ -1,5 +1,7 @@
 --TEST--
 Bug #77243 (Weekdays are calculated incorrectly for negative years)
+--SKIPIF--
+<?php if (PHP_INT_SIZE != 8) die("skip 64-bit only"); ?>
 --FILE--
 <?php
 date_default_timezone_set('UTC');
diff --git a/ext/date/tests/bug77243-002.phpt b/ext/date/tests/bug77243-002.phpt
index 40ea576aae3c1..fa6408da18ae1 100644
--- a/ext/date/tests/bug77243-002.phpt
+++ b/ext/date/tests/bug77243-002.phpt
@@ -1,5 +1,7 @@
 --TEST--
 Bug #77243 (Weekdays are calculated incorrectly for negative years)
+--SKIPIF--
+<?php if (PHP_INT_SIZE != 8) die("skip 64-bit only"); ?>
 --FILE--
 <?php
 date_default_timezone_set('UTC');