diff --git a/layout/reftests/bugs/408782-1-ref.html b/layout/reftests/bugs/408782-1-ref.html
new file mode 100644
index 000000000000..c40a08177302
--- /dev/null
+++ b/layout/reftests/bugs/408782-1-ref.html
@@ -0,0 +1,9 @@
+<html>
+<head>
+</head>
+<body>
+
+<input id="i" type="image" src="moz-no-such-scheme:nothing">
+
+</body>
+</html>
diff --git a/layout/reftests/bugs/408782-1a.html b/layout/reftests/bugs/408782-1a.html
new file mode 100644
index 000000000000..5a5c65f0a2c6
--- /dev/null
+++ b/layout/reftests/bugs/408782-1a.html
@@ -0,0 +1,9 @@
+<html class="reftest-wait">
+<head>
+</head>
+<body onload="document.getElementById('i').removeAttribute('alt'); document.documentElement.className='';">
+
+<input id="i" type="image" src="moz-no-such-scheme:nothing" alt="Alt">
+
+</body>
+</html>
diff --git a/layout/reftests/bugs/408782-1b.html b/layout/reftests/bugs/408782-1b.html
new file mode 100644
index 000000000000..f4044508e3d6
--- /dev/null
+++ b/layout/reftests/bugs/408782-1b.html
@@ -0,0 +1,9 @@
+<html class="reftest-wait">
+<head>
+</head>
+<body onload="document.getElementById('i').removeAttribute('value'); document.documentElement.className='';">
+
+<input id="i" type="image" src="moz-no-such-scheme:nothing" value="Value">
+
+</body>
+</html>
diff --git a/layout/reftests/bugs/408782-2-ref.html b/layout/reftests/bugs/408782-2-ref.html
new file mode 100644
index 000000000000..c5fbda2fe4d7
--- /dev/null
+++ b/layout/reftests/bugs/408782-2-ref.html
@@ -0,0 +1,5 @@
+<html>
+<body>
+<input id="i" type="image" src="moz-no-such-scheme:nothing" alt="Alt">
+</body>
+</html>
diff --git a/layout/reftests/bugs/408782-2a.html b/layout/reftests/bugs/408782-2a.html
new file mode 100644
index 000000000000..2ad4ab5cd60f
--- /dev/null
+++ b/layout/reftests/bugs/408782-2a.html
@@ -0,0 +1,5 @@
+<html>
+<body>
+<input id="i" type="image" src="moz-no-such-scheme:nothing" alt="Alt" value="Value">
+</body>
+</html>
diff --git a/layout/reftests/bugs/408782-2b.html b/layout/reftests/bugs/408782-2b.html
new file mode 100644
index 000000000000..1597dfaf2ec5
--- /dev/null
+++ b/layout/reftests/bugs/408782-2b.html
@@ -0,0 +1,9 @@
+<html class="reftest-wait">
+<head>
+</head>
+<body onload="document.getElementById('i').removeAttribute('alt'); document.documentElement.className='';">
+
+<input id="i" type="image" src="moz-no-such-scheme:nothing" value="Alt" alt="Value">
+
+</body>
+</html>
diff --git a/layout/reftests/bugs/reftest.list b/layout/reftests/bugs/reftest.list
index 57562bf66fcd..6aaf3de32e55 100644
--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -546,3 +546,7 @@ random == 403134-1.html 403134-1-ref.html # bug 405377
 == 407111-1.html 407111-1-ref.html
 == 407227-1.html 407227-1-ref.html
 == 407937-1.html 407937-1-ref.html
+== 408782-1a.html 408782-1-ref.html
+== 408782-1b.html 408782-1-ref.html
+== 408782-2a.html 408782-2-ref.html
+== 408782-2b.html 408782-2-ref.html
