diff --git a/layout/base/tests/bug1415416-ref.html b/layout/base/tests/bug1415416-ref.html
new file mode 100644
index 000000000000..ad3c8e85a3f0
--- /dev/null
+++ b/layout/base/tests/bug1415416-ref.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1415416
+-->
+<head>
+<title>Test for Bug 1415416</title>
+<script type="text/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
+<script>
+function runTest()
+{
+  sendKey("TAB");
+  document.documentElement.removeAttribute("class");
+}
+</script>
+</head>
+<body onload="runTest()">
+<input id = "text1" type="text" autofocus value=""/>
+<input id = "text2" type="text" value=""/>
+</body>
+</html>
diff --git a/layout/base/tests/bug1415416.html b/layout/base/tests/bug1415416.html
new file mode 100644
index 000000000000..74fff7fa7ba4
--- /dev/null
+++ b/layout/base/tests/bug1415416.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1415416
+-->
+<head>
+<title>Test for Bug 1415416</title>
+<script type="text/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
+<script>
+function runTest() {
+  var text = document.getElementById("text1");
+  text.readOnly = false;
+  text.value = "";
+
+  text = document.getElementById("text2");
+  text.readOnly = false;
+  text.value = "";
+
+  sendKey("TAB");
+  document.documentElement.removeAttribute("class");
+}
+</script>
+</head>
+<body onload="runTest()">
+<input id = "text1" type="text" readonly autofocus value="A" />
+<input id = "text2" type="text" readonly value="B"/>
+</body>
+</html>
diff --git a/layout/base/tests/mochitest.ini b/layout/base/tests/mochitest.ini
index cabcd897cf76..85722e655bcc 100644
--- a/layout/base/tests/mochitest.ini
+++ b/layout/base/tests/mochitest.ini
@@ -307,6 +307,8 @@ support-files =
   bug1354478-6-ref.html
   bug1359411.html
   bug1359411-ref.html
+  bug1415416.html
+  bug1415416-ref.html
   image_rgrg-256x256.png
   input-invalid-ref.html
   input-maxlength-invalid-change.html
diff --git a/layout/base/tests/test_reftests_with_caret.html b/layout/base/tests/test_reftests_with_caret.html
index 3b27b2889c38..7458bfbe1386 100644
--- a/layout/base/tests/test_reftests_with_caret.html
+++ b/layout/base/tests/test_reftests_with_caret.html
@@ -193,6 +193,7 @@ var tests = [
     [ 'bug1354478-5.html' , 'bug1354478-5-ref.html'] ,
     [ 'bug1354478-6.html' , 'bug1354478-6-ref.html'] ,
     [ 'bug1359411.html'   , 'bug1359411-ref.html' ] ,
+    [ 'bug1415416.html'   , 'bug1415416-ref.html' ] ,
     function() {SpecialPowers.pushPrefEnv({'clear': [['layout.accessiblecaret.enabled']]}, nextTest);} ,
 ];
 
