diff --git a/javatests/com/google/gitiles/doc/LinkTest.java b/javatests/com/google/gitiles/doc/LinkTest.java
index a7e08a0..fbc652a 100644
--- a/javatests/com/google/gitiles/doc/LinkTest.java
+++ b/javatests/com/google/gitiles/doc/LinkTest.java
@@ -60,6 +60,9 @@
 
     url = "//example.com/foo.html";
     assertThat(md.href(url)).isEqualTo(url);
+
+    url = "mailto://nobody@nowhere.org";
+    assertThat(md.href(url)).isEqualTo(url);
   }
 
   @Test