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diff --git a/ext/date/tests/date_isodate_set_basic1.phpt b/ext/date/tests/date_isodate_set_basic1.phpt
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+++ b/ext/date/tests/date_isodate_set_basic1.phpt
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+--TEST--
+Test date_isodate_set() function : basic functionality 
+--FILE--
+<?php
+/* Prototype  : DateTime date_isodate_set  ( DateTime $object  , int $year  , int $week  [, int $day  ] )
+ * Description: Set a date according to the ISO 8601 standard - using weeks and day offsets rather than specific dates. 
+ * Source code: ext/date/php_date.c
+ * Alias to functions: DateTime::setISODate
+ */
+
+echo "*** Testing date_isodate_set() : basic functionality ***\n";
+
+//Set the default time zone 
+date_default_timezone_set("Europe/London");
+
+// Create a deate object
+$datetime = date_create("2009-01-30 17:57:32");
+
+// Which month is week 40 ?
+date_isodate_set($datetime, 2008, 40);
+echo "Week 40 of 2009 is in \"" . date_format($datetime, "F") . "\"\n";
+
+// What date is week  week 30 day 3 ?
+date_isodate_set($datetime, 2009, 30, 3);
+echo "Week 30 day 3 of 2009 is \"" . date_format($datetime, "D M j") . "\"\n";
+
+// What date was is last year  ?
+date_isodate_set($datetime, 2008, 30, 3);
+echo "..same day last year was \"" . date_format($datetime, "D M j") . "\"\n";
+
+?>
+===DONE===
+--EXPECTF--
+*** Testing date_isodate_set() : basic functionality ***
+Week 40 of 2009 is in "September"
+Week 30 day 3 of 2009 is "Wed Jul 22"
+..same day last year was "Wed Jul 23"
+===DONE===