Index: tests/formatting/MakeClickable.php
===================================================================
--- tests/formatting/MakeClickable.php	(revision 25020)
+++ tests/formatting/MakeClickable.php	(working copy)
@@ -316,6 +316,39 @@
 	}
 
 	/**
+	 * @ticket 23756
+	 */
+	function test_no_links_inside_pre_or_code() {
+		$before = array(
+			'<pre>http://wordpress.org</pre>',
+			'<code>http://wordpress.org</code>',
+			'URL before pre http://wordpress.org<pre>http://wordpress.org</pre>',
+			'URL before code http://wordpress.org<code>http://wordpress.org</code>',
+			'URL after pre <pre>http://wordpress.org</pre>http://wordpress.org',
+			'URL after code <code>http://wordpress.org</code>http://wordpress.org',
+			'URL before and after pre http://wordpress.org<pre>http://wordpress.org</pre>http://wordpress.org',
+			'URL before and after code http://wordpress.org<code>http://wordpress.org</code>http://wordpress.org',
+			'code inside pre <pre>http://wordpress.org <code>http://wordpress.org</code> http://wordpress.org</pre>',
+		);
+
+		$expected = array(
+			'<pre>http://wordpress.org</pre>',
+			'<code>http://wordpress.org</code>',
+			'URL before pre <a href="http://wordpress.org" rel="nofollow">http://wordpress.org</a><pre>http://wordpress.org</pre>',
+			'URL before code <a href="http://wordpress.org" rel="nofollow">http://wordpress.org</a><code>http://wordpress.org</code>',
+			'URL after pre <pre>http://wordpress.org</pre><a href="http://wordpress.org" rel="nofollow">http://wordpress.org</a>',
+			'URL after code <code>http://wordpress.org</code><a href="http://wordpress.org" rel="nofollow">http://wordpress.org</a>',
+			'URL before and after pre <a href="http://wordpress.org" rel="nofollow">http://wordpress.org</a><pre>http://wordpress.org</pre><a href="http://wordpress.org" rel="nofollow">http://wordpress.org</a>',
+			'URL before and after code <a href="http://wordpress.org" rel="nofollow">http://wordpress.org</a><code>http://wordpress.org</code><a href="http://wordpress.org" rel="nofollow">http://wordpress.org</a>',
+			'code inside pre <pre>http://wordpress.org <code>http://wordpress.org</code> http://wordpress.org</pre>',
+		);
+
+		foreach ($before as $key => $url) {
+			$this->assertEquals($expected[$key], make_clickable($url));
+		}
+	}
+
+	/**
 	 * ticket 16892
 	 */
 	function test_no_segfault() {