diff --git a/server-timing/server_timing_header-parsing.https.html b/server-timing/server_timing_header-parsing.https.html
index 7469c55c9a5bc4..737cc08045ae94 100644
--- a/server-timing/server_timing_header-parsing.https.html
+++ b/server-timing/server_timing_header-parsing.https.html
@@ -9,7 +9,6 @@
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/common/performance-timeline-utils.js"></script>
-    <script src="/common/performance-timeline-utils.js"></script>
     <script>
       setup({explicit_done: true})
       const tests = []