diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 5b3faa75be7..3f3b41a79ea 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -5544,6 +5544,18 @@
             "url": "/_mozilla/css/text_overflow_ellipsis.html"
           }
         ],
+        "css/text_overflow_reflow.html": [
+          {
+            "path": "css/text_overflow_reflow.html",
+            "references": [
+              [
+                "/_mozilla/css/text_overflow_reflow_ref.html",
+                "=="
+              ]
+            ],
+            "url": "/_mozilla/css/text_overflow_reflow.html"
+          }
+        ],
         "css/text_overflow_string.html": [
           {
             "path": "css/text_overflow_string.html",
@@ -20874,6 +20886,18 @@
           "url": "/_mozilla/css/text_overflow_ellipsis.html"
         }
       ],
+      "css/text_overflow_reflow.html": [
+        {
+          "path": "css/text_overflow_reflow.html",
+          "references": [
+            [
+              "/_mozilla/css/text_overflow_reflow_ref.html",
+              "=="
+            ]
+          ],
+          "url": "/_mozilla/css/text_overflow_reflow.html"
+        }
+      ],
       "css/text_overflow_string.html": [
         {
           "path": "css/text_overflow_string.html",
diff --git a/tests/wpt/mozilla/tests/css/text_overflow_reflow.html b/tests/wpt/mozilla/tests/css/text_overflow_reflow.html
new file mode 100644
index 00000000000..958e2826fa4
--- /dev/null
+++ b/tests/wpt/mozilla/tests/css/text_overflow_reflow.html
@@ -0,0 +1,15 @@
+<!doctype html>
+<html class="reftest-wait">
+<meta charset="utf-8">
+<title>Text overflow should disappear when the container becomes large enough</title>
+<meta name="description" content="This test is targetted at bug #14952 in Servo's incremental reflow engine.">
+<link rel="match" href="text_overflow_reflow_ref.html">
+<style>html{font-family:Ahem}</style>
+<div id=goat style="width:5em"><p style="text-overflow:ellipsis;overflow:hidden">XXXXXXXXXX</p></div>
+<script>
+var goat = document.getElementById("goat");
+requestAnimationFrame(function() {
+    goat.style.width = "20em";
+    document.documentElement.className = "";
+});
+</script>
diff --git a/tests/wpt/mozilla/tests/css/text_overflow_reflow_ref.html b/tests/wpt/mozilla/tests/css/text_overflow_reflow_ref.html
new file mode 100644
index 00000000000..3997908406b
--- /dev/null
+++ b/tests/wpt/mozilla/tests/css/text_overflow_reflow_ref.html
@@ -0,0 +1,5 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Text overflow should disappear when the container becomes large enough</title>
+<style>html{font-family:Ahem}</style>
+<div style="width:20em"><p style="text-overflow:ellipsis;overflow:hidden">XXXXXXXXXX</p></div>
