1 files changed, 16 insertions, 0 deletions

diff --git a/tests/LinkFilterTest.php b/tests/LinkFilterTest.php
index 5fb2423f..164af0d4 100644
--- a/tests/LinkFilterTest.php
+++ b/tests/LinkFilterTest.php
@@ -254,4 +254,20 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
             count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, 'free software'))
         );
     }
+
+    /**
+     * Tag search with exclusion.
+     */
+    public function testTagFilterWithExclusion()
+    {
+        $this->assertEquals(
+            1,
+            count(self::$linkFilter->filter(LinkFilter::$FILTER_TAG, 'gnu -free'))
+        );
+
+        $this->assertEquals(
+            5,
+            count(self::$linkFilter->filter(LinkFilter::$FILTER_TAG, '-free'))
+        );
+    }
 }