diff --git a/layout/generic/nsImageFrame.cpp b/layout/generic/nsImageFrame.cpp
index 82d421475fcd..2e1509b42731 100644
--- a/layout/generic/nsImageFrame.cpp
+++ b/layout/generic/nsImageFrame.cpp
@@ -180,6 +180,15 @@ bool nsImageFrame::ShouldShowBrokenImageIcon() const {
     return false;
   }
 
+  // <img alt=""> is special, and it shouldn't draw the broken image icon,
+  // unlike the no-alt attribute or non-empty-alt-attribute case.
+  if (auto* image = HTMLImageElement::FromNode(mContent)) {
+    const nsAttrValue* alt = image->GetParsedAttr(nsGkAtoms::alt);
+    if (alt && alt->IsEmptyString()) {
+      return false;
+    }
+  }
+
   // check for broken images. valid null images (eg. img src="") are
   // not considered broken because they have no image requests
   if (nsCOMPtr<imgIRequest> currentRequest = GetCurrentRequest()) {
diff --git a/testing/web-platform/tests/html/rendering/replaced-elements/attributes-for-embedded-content-and-images/img-empty-alt-replaced.html b/testing/web-platform/tests/html/rendering/replaced-elements/attributes-for-embedded-content-and-images/img-empty-alt-replaced.html
new file mode 100644
index 000000000000..3cc06d6c8538
--- /dev/null
+++ b/testing/web-platform/tests/html/rendering/replaced-elements/attributes-for-embedded-content-and-images/img-empty-alt-replaced.html
@@ -0,0 +1,23 @@
+<!doctype html>
+<title>Images with an empty alt attribute have an intrinsic size of zero</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+  img {
+    width: 50px;
+    height: auto;
+  }
+</style>
+<img src="broken">
+<img src="broken" alt="non-empty">
+<img src="broken" alt="">
+<script>
+const t = async_test("Images with an empty alt attribute have an intrinsic size of zero");
+onload = t.step_func_done(function() {
+  for (const img of document.querySelectorAll("img")) {
+    const alt = img.getAttribute("alt");
+    const shouldTakeUpSpace = alt == null || alt.length > 0;
+    (shouldTakeUpSpace ? assert_not_equals : assert_equals)(img.offsetHeight, 0, img.outerHTML);
+  }
+});
+</script>
