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-rw-r--r--dom/base/test/chrome/test_bug339494.xhtml2
1 files changed, 1 insertions, 1 deletions
diff --git a/dom/base/test/chrome/test_bug339494.xhtml b/dom/base/test/chrome/test_bug339494.xhtml
index 203f6e644d..afab41b65c 100644
--- a/dom/base/test/chrome/test_bug339494.xhtml
+++ b/dom/base/test/chrome/test_bug339494.xhtml
@@ -55,7 +55,7 @@ SimpleTest.waitForExplicitFinish();
s.setAttribute("ggg", "testvalue");
await promiseFlushingMutationObserver();
- const observer = new MutationObserver((aMutationList, aObserver) => {
+ const observer = new MutationObserver(() => {
ok(s.hasAttribute("ggg"), "Value check 3. There should be a value");
isnot(s.getAttribute("ggg"), "testvalue", "Value check 4");
is(s.getAttribute("ggg"), "othervalue", "Value check 5");