diff --git a/content/html/content/test/test_bug457800.html b/content/html/content/test/test_bug457800.html
index 6079a47c6d9e..b0da1835643e 100644
--- a/content/html/content/test/test_bug457800.html
+++ b/content/html/content/test/test_bug457800.html
@@ -41,6 +41,14 @@ function testPlaceholderForElement(element)
   element.value = 'value';
   is(element.placeholder, 'ph', "placeholder in DOM interface has changed when value has changed");
   is(element.getAttribute('placeholder'), 'ph', "placeholder attribute has changed when value has changed");
+
+  // check new lines are managed correctly (shouldn't be shown but kept in the DOM)
+  element.placeholder = 'place\nholder';
+  is(element.placeholder, 'place\nholder', "\\n shouldn't be stripped");
+  is(element.getAttribute('placeholder'), 'place\nholder', "\\n shouldn't be stripped");
+  element.placeholder = 'place\rholder';
+  is(element.placeholder, 'place\rholder', "\\r shouldn't be stripped");
+  is(element.getAttribute('placeholder'), 'place\rholder', "\\r shouldn't be stripped");
 }
 
 testPlaceholderForElement(document.getElementById('inputtext'));
diff --git a/layout/reftests/forms/placeholder/placeholder-11.html b/layout/reftests/forms/placeholder/placeholder-11.html
new file mode 100644
index 000000000000..817b5bd75a0f
--- /dev/null
+++ b/layout/reftests/forms/placeholder/placeholder-11.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html>
+  <!-- Test: placeholder shouldn't show new lines (&#10; version) -->
+  <body>
+    <input type="text" value="" placeholder="my&#10; placeholder">
+  </body>
+</html>
diff --git a/layout/reftests/forms/placeholder/placeholder-12.html b/layout/reftests/forms/placeholder/placeholder-12.html
new file mode 100644
index 000000000000..eff3a6d1fcf9
--- /dev/null
+++ b/layout/reftests/forms/placeholder/placeholder-12.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html>
+  <!-- Test: placeholder shouldn't show new lines (&#13; version) -->
+  <body>
+    <input type="text" value="" placeholder="my&#13; placeholder">
+  </body>
+</html>
diff --git a/layout/reftests/forms/placeholder/placeholder-13.html b/layout/reftests/forms/placeholder/placeholder-13.html
new file mode 100644
index 000000000000..0cc60b4b0c8d
--- /dev/null
+++ b/layout/reftests/forms/placeholder/placeholder-13.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+  <!-- Test: placeholder shouldn't show new lines (\r version) -->
+  <script type="text/javascript">
+    function setPlaceholder()
+    {
+      document.getElementById('p1').placeholder = 'my\r placeholder';
+    }
+    function disableReftestWait()
+    {
+      document.documentElement.className = '';
+    }
+  </script>
+  <body onload="setPlaceholder(); disableReftestWait();">
+    <input type="text" id="p1" value="" placeholder="">
+  </body>
+</html>
diff --git a/layout/reftests/forms/placeholder/placeholder-14.html b/layout/reftests/forms/placeholder/placeholder-14.html
new file mode 100644
index 000000000000..aaea5d22fc24
--- /dev/null
+++ b/layout/reftests/forms/placeholder/placeholder-14.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+  <!-- Test: placeholder shouldn't show new lines (\n version) -->
+  <script type="text/javascript">
+    function setPlaceholder()
+    {
+      document.getElementById('p1').placeholder = 'my\n placeholder';
+    }
+    function disableReftestWait()
+    {
+      document.documentElement.className = '';
+    }
+  </script>
+  <body onload="setPlaceholder(); disableReftestWait();">
+    <input type="text" id="p1" value="" placeholder="">
+  </body>
+</html>
diff --git a/layout/reftests/forms/placeholder/reftest.list b/layout/reftests/forms/placeholder/reftest.list
index a0bdbd6a49a6..96c3a33693eb 100644
--- a/layout/reftests/forms/placeholder/reftest.list
+++ b/layout/reftests/forms/placeholder/reftest.list
@@ -11,3 +11,7 @@
 == placeholder-8.html placeholder-focus-ref.html
 == placeholder-9.html placeholder-focus-ref.html
 == placeholder-10.html placeholder-visible-ref.html
+== placeholder-11.html placeholder-visible-ref.html
+== placeholder-12.html placeholder-visible-ref.html
+== placeholder-13.html placeholder-visible-ref.html
+== placeholder-14.html placeholder-visible-ref.html
