diff --git a/dom/html/test/file_fullscreen-backdrop.html b/dom/html/test/file_fullscreen-backdrop.html
new file mode 100644
index 00000000000..8c13e1bd5ae
--- /dev/null
+++ b/dom/html/test/file_fullscreen-backdrop.html
@@ -0,0 +1,89 @@
+
+
+
+
+ Test for Bug 1064843
+
+
+
+
+
+
+
+
+
+
+
diff --git a/dom/html/test/mochitest.ini b/dom/html/test/mochitest.ini
index 45982ec4781..a5904101623 100644
--- a/dom/html/test/mochitest.ini
+++ b/dom/html/test/mochitest.ini
@@ -47,6 +47,7 @@ support-files =
file_formSubmission_img.jpg
file_formSubmission_text.txt
file_fullscreen-api.html
+ file_fullscreen-backdrop.html
file_fullscreen-denied-inner.html
file_fullscreen-denied.html
file_fullscreen-esc-exit-inner.html
diff --git a/dom/html/test/test_fullscreen-api.html b/dom/html/test/test_fullscreen-api.html
index 27b9834eec4..2e908dcc013 100644
--- a/dom/html/test/test_fullscreen-api.html
+++ b/dom/html/test/test_fullscreen-api.html
@@ -40,6 +40,7 @@ var gTestWindows = [
"file_fullscreen-scrollbar.html",
"file_fullscreen-selector.html",
"file_fullscreen-top-layer.html",
+ "file_fullscreen-backdrop.html",
"file_fullscreen-nested.html",
];