diff --git a/tests/show_results.py b/tests/show_results.py
index ed53777c6..3255593c6 100755
--- a/tests/show_results.py
+++ b/tests/show_results.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 
 import http.server
+import json
 import multiprocessing
 import os
 import posixpath
@@ -13,6 +14,7 @@ import click
 
 ROOT = Path(__file__).resolve().parent.parent
 TEST_RESULT_PATH = ROOT / "tests" / "ui_tests" / "reporting" / "reports" / "test"
+FIXTURES_PATH = ROOT / "tests" / "ui_tests" / "fixtures.json"
 
 
 class NoCacheRequestHandler(http.server.SimpleHTTPRequestHandler):
@@ -52,6 +54,28 @@ class NoCacheRequestHandler(http.server.SimpleHTTPRequestHandler):
             path += "/"
         return path
 
+    def do_POST(self) -> None:
+        if self.path == "/fixtures.json" and FIXTURES_PATH.exists():
+
+            length = int(self.headers.get("content-length"))
+            field_data = self.rfile.read(length)
+            data = json.loads(field_data)
+
+            test_name = data.get("test")
+            test_hash = data.get("hash")
+
+            if test_name is not None and test_hash is not None:
+                with open(FIXTURES_PATH, "r") as jsonFile:
+                    fixtures = json.load(jsonFile)
+                fixtures[test_name] = test_hash
+                with open(FIXTURES_PATH, "w") as jsonFile:
+                    json.dump(fixtures, jsonFile, indent=0)
+                    jsonFile.write("\n")
+
+            self.send_response(200)
+            self.send_header("Content-Type", "text/plain")
+            self.end_headers()
+
 
 def launch_http_server(port: int) -> None:
     http.server.test(HandlerClass=NoCacheRequestHandler, bind="localhost", port=port)  # type: ignore [test is defined]
diff --git a/tests/ui_tests/reporting/testreport.css b/tests/ui_tests/reporting/testreport.css
index f526d65ab..6397b3431 100644
--- a/tests/ui_tests/reporting/testreport.css
+++ b/tests/ui_tests/reporting/testreport.css
@@ -14,7 +14,7 @@ tr.bad a, tr.bad a:visited {
     position: fixed;
     top: 50px;
     right: 5px;
-    width: 300px;
+    width: 500px;
     padding: 1em;
 }
 
@@ -39,6 +39,15 @@ tr.bad a, tr.bad a:visited {
     border-color: lightgreen;
 }
 
+#markbox #mark-update {
+    color: green;
+    border-color: darkgreen;
+}
+
+#markbox #mark-update:hover {
+    border-color: lightgreen;
+}
+
 #markbox #mark-bad {
     color: darkred;
     border-color: darkred;
diff --git a/tests/ui_tests/reporting/testreport.js b/tests/ui_tests/reporting/testreport.js
index 8329146d6..cb5f8cfc9 100644
--- a/tests/ui_tests/reporting/testreport.js
+++ b/tests/ui_tests/reporting/testreport.js
@@ -25,7 +25,25 @@ function itemKeyFromIndexEntry(entry) {
 
 
 function markState(state) {
-    window.localStorage.setItem(itemKeyFromOneTest(), state)
+    if (state === 'update') {
+        let lastIndex = decodeURIComponent(window.location.href).split("/").reverse()[0].lastIndexOf(".")
+        let stem = decodeURIComponent(window.location.href).split("/").reverse()[0].slice(0, lastIndex)
+        fetch('http://localhost:8000/fixtures.json', {
+            method: 'POST',
+            headers: {
+                'Accept': 'application/json',
+                'Content-Type': 'application/json'
+            },
+            body: JSON.stringify({
+                "test": stem,
+                "hash": document.body.dataset.actualHash
+            })
+         }).then(() => {})
+        window.localStorage.setItem(itemKeyFromOneTest(), 'ok')
+    } else {
+        window.localStorage.setItem(itemKeyFromOneTest(), state)
+    }
+
     if (window.nextHref) {
         window.location.assign(window.nextHref)
     } else {
@@ -36,9 +54,9 @@ function markState(state) {
 
 function resetState(whichState) {
     function shouldReset(value) {
-        if (value == whichState) return true
-        if (whichState != "all") return false
-        return (value == "bad" || value == "ok")
+        if (value === whichState) return true
+        if (whichState !== "all") return false
+        return (value === "bad" || value === "ok")
     }
 
     let keysToReset = []
@@ -64,13 +82,13 @@ function findNextForHref(doc, href) {
         let a = tr.querySelector("a")
         if (!a) continue
         if (foundIt) return a.href
-        else if (a.href == href) foundIt = true
+        else if (a.href === href) foundIt = true
     }
 }
 
 
 function openLink(ev) {
-    if (ev.button == 2) {
+    if (ev.button === 2) {
         // let right click through
         return true;
     }
@@ -78,8 +96,7 @@ function openLink(ev) {
     // capture other clicks
     ev.preventDefault()
     let href = ev.target.href
-    let newWindow = window.open(href)
-    newWindow
+    window.open(href)
 }
 
 
@@ -124,7 +141,7 @@ function onLoadTestCase() {
 
 
 function onLoad() {
-    if (window.location.protocol == "file") return
+    if (window.location.protocol === "file") return
 
     for (let elem of document.getElementsByClassName("script-hidden")) {
         elem.classList.remove("script-hidden")
diff --git a/tests/ui_tests/reporting/testreport.py b/tests/ui_tests/reporting/testreport.py
index bf359d292..4c496a011 100644
--- a/tests/ui_tests/reporting/testreport.py
+++ b/tests/ui_tests/reporting/testreport.py
@@ -271,6 +271,7 @@ def failed(
             p("Click a button to mark the test result as:")
             with div(id="buttons"):
                 t.button("OK", id="mark-ok", onclick="markState('ok')")
+                t.button("OK & UPDATE", id="mark-update", onclick="markState('update')")
                 t.button("BAD", id="mark-bad", onclick="markState('bad')")
 
         if download_failed: