Index: wp-testcase/test_includes_formatting.php
===================================================================
--- wp-testcase/test_includes_formatting.php	(revision 318)
+++ wp-testcase/test_includes_formatting.php	(working copy)
@@ -403,7 +403,15 @@
 		$this->assertEquals('‘test’s quoted’', wptexturize('\'test\'s quoted\''));
 		$this->assertEquals('“test’s quoted”', wptexturize('"test\'s quoted"'));
 	}
-	
+
+	//WP Tickets #4539, #15241
+	function test_full_sentences_with_unmatched_single_quotes() {
+		$this->assertEquals(
+			'That means every moment you#8217;re working on something without it being in the public it#8217;s actually dying.',
+			wptexturize("That means every moment you're working on something without it being in the public it's actually dying.")
+		);
+	}
+
 	//WP Ticket #4539
 	function test_quotes() {
 		$this->knownWPBug(4539);