diff --git a/layout/html/tests/table/bugs/bug28933.html b/layout/html/tests/table/bugs/bug28933.html
new file mode 100644
index 00000000000..46bfa6a383b
--- /dev/null
+++ b/layout/html/tests/table/bugs/bug28933.html
@@ -0,0 +1,10 @@
+<title>test</title>
+
+<table style='border-collapse:collapse;'>
+  <tr>
+    <td rowspan=2></td>
+  </tr>
+  <tr>
+    <td></td>
+  </tr>
+</table>
diff --git a/layout/html/tests/table/bugs/file_list.txt b/layout/html/tests/table/bugs/file_list.txt
index 19757df9826..5528130b3f6 100644
--- a/layout/html/tests/table/bugs/file_list.txt
+++ b/layout/html/tests/table/bugs/file_list.txt
@@ -138,6 +138,7 @@ file:///s|/mozilla/layout/html/tests/table/bugs/bug2962.html
 file:///s|/mozilla/layout/html/tests/table/bugs/bug2973.html
 file:///s|/mozilla/layout/html/tests/table/bugs/bug2981-1.html
 file:///s|/mozilla/layout/html/tests/table/bugs/bug2981-2.html
+file:///s|/mozilla/layout/html/tests/table/bugs/bug28933.html
 file:///s|/mozilla/layout/html/tests/table/bugs/bug2997.html
 file:///s|/mozilla/layout/html/tests/table/bugs/bug3037-1.html
 file:///s|/mozilla/layout/html/tests/table/bugs/bug3037-2.html