diff --git a/tests/wpt/metadata/html/infrastructure/terminology/plugins/text-plain.html.ini b/tests/wpt/metadata/html/infrastructure/terminology/plugins/text-plain.html.ini
index 0232c2adc24..d6002466abd 100644
--- a/tests/wpt/metadata/html/infrastructure/terminology/plugins/text-plain.html.ini
+++ b/tests/wpt/metadata/html/infrastructure/terminology/plugins/text-plain.html.ini
@@ -1,5 +1,4 @@
 [text-plain.html]
   type: testharness
-  [A user agent must not consider the type text/plain as having a registered plugin.]
-    expected: FAIL
+  disabled: https://github.com/servo/servo/issues/9286