diff --git a/dom/bindings/test/mochitest.ini b/dom/bindings/test/mochitest.ini
index 9be86f5805a3..f9b64bede895 100644
--- a/dom/bindings/test/mochitest.ini
+++ b/dom/bindings/test/mochitest.ini
@@ -23,6 +23,7 @@ skip-if = debug == false
 [test_bug963382.html]
 skip-if = debug == false
 [test_bug1041646.html]
+[test_bug1123875.html]
 [test_barewordGetsWindow.html]
 [test_callback_default_thisval.html]
 [test_cloneAndImportNode.html]
diff --git a/dom/bindings/test/test_bug1123875.html b/dom/bindings/test/test_bug1123875.html
new file mode 100644
index 000000000000..5658091c4484
--- /dev/null
+++ b/dom/bindings/test/test_bug1123875.html
@@ -0,0 +1,14 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Test for Bug 1123875</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<div id=log></div>
+<script>
+  test(() => {
+    assert_throws(new TypeError, () => {
+      "use strict";
+      document.childNodes.length = 0;
+    });
+  }, "setting a readonly attribute on a proxy in strict mode should throw a TypeError");
+</script>
