diff --git a/layout/reftests/bugs/600803-1-ref.html b/layout/reftests/bugs/600803-1-ref.html
new file mode 100644
index 00000000000..876a893a640
--- /dev/null
+++ b/layout/reftests/bugs/600803-1-ref.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+  <body onload="onLoad()">
+    <textarea></textarea>
+    <div id="start"></div>
+    <div id="end"></div>
+    <script>
+      function onLoad() {
+        var t = document.querySelector("textarea");
+        t.value = "Xaa\nbbb";
+        t.value = "aaa\nbbb\n";
+        t.value += "X";
+        document.getElementById("start").textContent = t.selectionStart;
+        document.getElementById("end").textContent = t.selectionEnd;
+      }
+    </script>
+  </body>
+</html>
diff --git a/layout/reftests/bugs/600803-1.html b/layout/reftests/bugs/600803-1.html
new file mode 100644
index 00000000000..6b73a21560a
--- /dev/null
+++ b/layout/reftests/bugs/600803-1.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+  <body onload="onLoad()">
+    <textarea></textarea>
+    <div id="start"></div>
+    <div id="end"></div>
+    <script>
+      function onLoad() {
+        var t = document.querySelector("textarea");
+        t.value = "aaa\nbbb";
+        t.value = "aaa\nbbb\n";
+        t.value += "X";
+        document.getElementById("start").textContent = t.selectionStart;
+        document.getElementById("end").textContent = t.selectionEnd;
+      }
+    </script>
+  </body>
+</html>
diff --git a/layout/reftests/bugs/reftest.list b/layout/reftests/bugs/reftest.list
index f02d35fcbe4..e90d6cca5cd 100644
--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -1511,3 +1511,4 @@ random-if(layersGPUAccelerated) == 581317-1.html 581317-1-ref.html
 == 594624-1.html 594624-1-ref.html
 == 597721-1.html 597721-1-ref.html
 fails-if(!haveTestPlugin) == 599476.html 599476-ref.html
+== 600803-1.html 600803-1-ref.html
