2 files changed, 16 insertions, 0 deletions
diff --git a/testing/web-platform/tests/accname/name/comp_label.html b/testing/web-platform/tests/accname/name/comp_label.html
index 8b569ba6ff..3eda2a5367 100644
--- a/testing/web-platform/tests/accname/name/comp_label.html
+++ b/testing/web-platform/tests/accname/name/comp_label.html
@@ -186,6 +186,12 @@ x
   x
 </button>
 
+<span style="display: none">
+<button data-expectedlabel="" data-testname="Hidden button's label should be the empty string" class="ex">
+x
+</button>
+</span>
+
 <!-- Step 2B: LabelledBy supercedes 2D: AriaLabel, also see wpt/accname/name/comp_labelledby.html -->
 <a href="#" aria-labelledby="span6" aria-label="foo" data-expectedlabel="label" data-testname="link's aria-labelledby name supercedes aria-label" class="ex">x</a>
 <span id="span6">label</span>
diff --git a/testing/web-platform/tests/accname/name/comp_name_from_content.html b/testing/web-platform/tests/accname/name/comp_name_from_content.html
index deae6699c6..3504658ea4 100644
--- a/testing/web-platform/tests/accname/name/comp_name_from_content.html
+++ b/testing/web-platform/tests/accname/name/comp_name_from_content.html
@@ -49,6 +49,12 @@
       content: " after "; /* [sic] leading and trailing space */
       content: " after " / " alt-after "; /* Override the previous line for engines that support the Alternative Text syntax. */
     }
+    .fallback-before-empty::before {
+      content: "before"  / "";
+    }
+    .fallback-before-image-empty::before {
+      content: "before " url(/images/blue.png) / "";
+    }
     .fallback-before-mixed::before {
       content: " before "; /* [sic] leading and trailing space */
       content: " before " / " start " attr(data-alt-text-before) " end "; /* Override the previous line for engines that support the Alternative Text syntax. */
@@ -145,6 +151,10 @@
 <a href="#" data-alt-text-before="alt-before" data-alt-text-after="alt-after" data-expectedlabel="start alt-before end label start alt-after end" data-testname="link name from fallback content mixing attr() and strings with ::before and ::after" class="ex fallback-before-mixed fallback-after-mixed">label</a><br>
 <br>
 
+<h1>Empty alternative text for CSS content in pseudo-elements when applied to primitive appearance form controls</h1>
+<p><input data-expectedlabel="" data-testname="primitive radio input with ::before containing empty alternative text" class="ex fallback-before-empty" type=radio style=appearance:none>
+<p><input data-expectedlabel="" data-testname="primitive radio input with ::before containing empty alternative text for an image" class="ex fallback-before-image-empty" type=radio style=appearance:none>
+
 <h1>simple w/ for each child</h1>
 <button data-expectedlabel="one two three" data-testname="button name from content for each child" class="ex"><span>one</span> <span>two</span> <span>three</span></button><br>
 <h3 data-expectedlabel="one two three" data-testname="heading name from content for each child" class="ex"><span>one</span> <span>two</span> <span>three</span></h3>