diff --git modules/filter/filter.test modules/filter/filter.test
index e8b8058..40d0977 100644
--- modules/filter/filter.test
+++ modules/filter/filter.test
@@ -833,6 +833,10 @@ class FilterUnitTestCase extends DrupalUnitTestCase {
       '<blockquote><pre>aaa</pre></blockquote>' => array(
         "<blockquote><pre>aaa</pre></blockquote>" => TRUE,
       ),
+      "<pre>aaa\nbbb\nccc</pre>\nddd\neee" => array(
+        "<pre>aaa\nbbb\nccc</pre>" => TRUE,
+        "<p>ddd<br />\neee</p>" => TRUE,
+      )
     );
     $this->assertFilteredString($filter, $tests);