diff --git a/ext/date/tests/bug73837.phpt b/ext/date/tests/bug73837.phpt
new file mode 100644
index 00000000000..220deb6121f
--- /dev/null
+++ b/ext/date/tests/bug73837.phpt
@@ -0,0 +1,17 @@
+--TEST--
+Bug #73837: Milliseconds in DateTime()
+--FILE--
+<?php
+$collect = [];
+
+for ( $i = 0; $i < 1000; $i++ )
+{
+	$a = new DateTime();
+	$key = "s" . $a->format( "u" );
+	$collect[$key] = true;
+}
+
+echo ( count( $collect ) > 990 ) ? "microseconds differ\n" : "microseconds do not differ enough\n";
+?>
+--EXPECT--
+microseconds differ