diff --git a/Base/res/html/misc/cookie.html b/Base/res/html/misc/cookie.html
deleted file mode 100644
index f4a5cf4ab1..0000000000
--- a/Base/res/html/misc/cookie.html
+++ /dev/null
@@ -1,55 +0,0 @@
-<body>
-    <h3>Valid cookies:</h3>
-    <br /><input type=button onclick="setCookie(this.value)" value="cookie1=value1; max-age=5; path=/res/html" />
-    <br /><input type=button onclick="setCookie(this.value)" value="cookie2=value2; expires=Sat, 23 Jan 2060 08:10:36 GMT" />
-    <br /><input type=button onclick="setCookie(this.value)" value="cookie3=value3" />
-    <br /><input type=button onclick="setCookie(this.value)" value="cookie4=value4;SameSite=Lax" />
-    <br /><input type=button onclick="setCookie(this.value)" value="cookie5=value5;SameSite=Strict" />
-    <br /><input type=button onclick="setCookie(this.value)" value="cookie6=value6;SameSite=None" />
-    <br /><input type=button onclick="setPrettyLargeCookie()" value="cookie7=xxxxx..[2048 x's]" />
-    <br />
-
-    <h3>Invalid cookies (the browser should reject these):</h3>
-    <br /><input id=invalid1 type=button onclick="setCookie(this.value)" value="cookie4=value4; domain=serenityos.org" />
-    <label for=invalid1>The Domain attribute does not domain-match this page</label>
-    <br /><input id=invalid2 type=button onclick="setCookie(this.value)" value="cookie5=value5; httponly" />
-    <label for=invalid2>The cookie is HttpOnly thus cannot be set via JavaScript</label>
-    <br /><input id=invalid3 type=button onclick="setCookie(this.value)" value="cookie6=value6; max-age=-1" />
-    <label for=invalid3>The cookie expired in the past</label>
-    <br /><input id=invalid4 type=button onclick="setCookie(this.value)" value="cookie7=value7; expires=Mon, 23 Jan 1989 08:10:36 GMT" />
-    <label for=invalid4>The cookie expired in the past</label>
-    <br /><input id=invalid5 type=button onclick="setTooLargeCookie()" value="cookie10=[more than 4096 chars]" />
-    <label for=invalid5>The cookie is too large</label>
-    <br /><input id=invalid6 type=button onclick="setCookie(this.value)" value="cookie11=value11; domain=uk.gov" />
-    <label for=invalid6>The cookie's domain is on the Public Suffix List</label>
-    <br /><input id=invalid7 type=button onclick="setCookie(this.value)" value="cookie12=value12; expires=Sat, 31 Feb 2060 08:10:36 GMT" />
-    <label for=invalid4>The cookie has a date that does not exist</label>
-    <br />
-
-    <h3>Unretrievable cookies (the browser should accept these but not display them):</h3>
-    <br /><input id=locked1 type=button onclick="setCookie(this.value)" value="cookie8=value8; path=/not/this/path" />
-    <label for=locked1>The Path attribute does not path-match this page</label>
-    <br /><input id=locked2 type=button onclick="setCookie(this.value)" value="cookie9=value9; secure" />
-    <label for=locked2>The cookie is Secure thus cannot be viewed by a file:// page</label>
-    <br />
-
-    <pre>document.cookie = <span id=cookies></span></pre>
-
-    <script>
-        function setCookie(cookie) {
-            document.cookie = cookie;
-            document.getElementById('cookies').innerHTML = document.cookie;
-        }
-
-        function setPrettyLargeCookie() {
-            setCookie('cookie7=' + 'x'.repeat(2048));
-        }
-
-        function setTooLargeCookie() {
-            const cookie = 'name=' + 'x'.repeat(4 << 10);
-            setCookie(cookie);
-        }
-
-        document.getElementById('cookies').innerHTML = document.cookie;
-    </script>
-</body>
diff --git a/Base/res/html/misc/welcome.html b/Base/res/html/misc/welcome.html
index c7043ddbe1..243080ba87 100644
--- a/Base/res/html/misc/welcome.html
+++ b/Base/res/html/misc/welcome.html
@@ -173,7 +173,6 @@
             <li><a href="mouse-events.html">mouse events</a></li>
             <li><a href="message-channel.html">MessageChannel</a></li>
             <li><a href="websocket.html">WebSocket API Test</a></li>
-            <li><a href="cookie.html">document.cookie</a></li>
             <li><a href="event-bubbling-and-multiple-listeners.html">event bubbling and multiple listeners</a></li>
             <li><a href="raf.html">requestAnimationFrame</a></li>
             <li><a href="events.html">simple DOM events</a></li>
diff --git a/Tests/LibWeb/Text/expected/cookie.txt b/Tests/LibWeb/Text/expected/cookie.txt
new file mode 100644
index 0000000000..08d84d2a5a
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/cookie.txt
@@ -0,0 +1,20 @@
+   Basic test: "cookie=value"
+Multiple cookies: "cookie1=value1; cookie2=value2; cookie3=value3"
+Large value: "cookie=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+Overly large value: ""
+HTTP only: ""
+Public suffix: ""
+SameSite=Lax: "cookie=value"
+SameSite=Strict: "cookie=value"
+SameSite=None: "cookie=value"
+Max-Age (before expiration): "cookie-max-age=value"
+Expires (before expiration): "cookie-expires=value; cookie-max-age=value"
+Max-Age (after expiration): ""
+Expires (after expiration): ""
+Max-Age in past: ""
+Expires in past: ""
+Invalid expiry (date does not exist): "cookie=value"
+Invalid expiry (missing time): "cookie=value"
+Invalid expiry (missing day): "cookie=value"
+Invalid expiry (missing month): "cookie=value"
+Invalid expiry (missing year): "cookie=value"
diff --git a/Tests/LibWeb/Text/input/cookie.html b/Tests/LibWeb/Text/input/cookie.html
new file mode 100644
index 0000000000..d5070459d6
--- /dev/null
+++ b/Tests/LibWeb/Text/input/cookie.html
@@ -0,0 +1,153 @@
+<div id="test"></div>
+<script src="include.js"></script>
+<script>
+    const printCookies = label => {
+        // There's no specified order for multiple cookies, and it's a bit non-deterministic in our implementation.
+        // Sort the cookies alphabetically here for ease of testing.
+        const cookies = document.cookie.split("; ").sort().join("; ");
+        println(`${label}: "${cookies}"`);
+    };
+
+    const deleteCookie = name => {
+        document.cookie = `${name}=""; max-age=-9999`;
+    };
+
+    const basicTest = () => {
+        document.cookie = "cookie=value";
+        printCookies("Basic test");
+
+        deleteCookie("cookie");
+    };
+
+    const multipleCookiesTest = () => {
+        document.cookie = "cookie1=value1";
+        document.cookie = "cookie2=value2";
+        document.cookie = "cookie3=value3";
+
+        printCookies("Multiple cookies");
+
+        deleteCookie("cookie1");
+        deleteCookie("cookie2");
+        deleteCookie("cookie3");
+    };
+
+    const largeValueTest = () => {
+        const value = "x".repeat(256);
+
+        document.cookie = `cookie=${value}`;
+        printCookies("Large value");
+
+        deleteCookie("cookie");
+    };
+
+    const overlyLargeValueTest = () => {
+        const value = "x".repeat(4096 - "cookie=".length + 1);
+
+        document.cookie = `cookie=${value}`;
+        printCookies("Overly large value");
+    };
+
+    const httpOnlyTest = () => {
+        document.cookie = "cookie=value; httponly";
+        printCookies("HTTP only");
+    };
+
+    const publicSuffixTest = () => {
+        document.cookie = "cookie=value; domain=uk.gov";
+        printCookies("Public suffix");
+    };
+
+    const sameSiteTest = () => {
+        document.cookie = "cookie=value; SameSite=Lax";
+        printCookies("SameSite=Lax");
+        deleteCookie("cookie");
+
+        document.cookie = "cookie=value; SameSite=Strict";
+        printCookies("SameSite=Strict");
+        deleteCookie("cookie");
+
+        document.cookie = "cookie=value; SameSite=None";
+        printCookies("SameSite=None");
+        deleteCookie("cookie");
+    };
+
+    const maxAgeTest1 = () => {
+        document.cookie = "cookie-max-age=value; max-age=1";
+        printCookies("Max-Age (before expiration)");
+    };
+
+    const maxAgeTest2 = () => {
+        printCookies("Max-Age (after expiration)");
+    };
+
+    const maxAgeInPastTest = () => {
+        document.cookie = "cookie=value; max-age=-1";
+        printCookies("Max-Age in past");
+    };
+
+    const expiresTest1 = () => {
+        let expiry = new Date(Date.now() + 1000);
+        expiry = expiry.toUTCString();
+
+        document.cookie = `cookie-expires=value; expires=${expiry}`;
+        printCookies("Expires (before expiration)");
+    };
+
+    const expiresTest2 = () => {
+        printCookies("Expires (after expiration)");
+    };
+
+    const expiresInPastTest = () => {
+        document.cookie = "cookie=value; expires=Mon, 23 Jan 1989 08:10:36 GMT";
+        printCookies("Expires in past");
+    };
+
+    // Note that in these cases, the attribute is simply ignored, rather than the cookie being rejected.
+    const invalidExpiryTest = () => {
+        document.cookie = "cookie=value; expires=Sat, 31 Feb 2060 08:10:36 GMT";
+        printCookies("Invalid expiry (date does not exist)");
+        deleteCookie("cookie");
+
+        document.cookie = "cookie=value; expires=Sat, 31 Feb 2060 GMT";
+        printCookies("Invalid expiry (missing time)");
+        deleteCookie("cookie");
+
+        document.cookie = "cookie=value; expires=Sat, Feb 2060 08:10:36 GMT";
+        printCookies("Invalid expiry (missing day)");
+        deleteCookie("cookie");
+
+        document.cookie = "cookie=value; expires=Sat, 31 2060 08:10:36 GMT";
+        printCookies("Invalid expiry (missing month)");
+        deleteCookie("cookie");
+
+        document.cookie = "cookie=value; expires=Sat, 31 Feb 08:10:36 GMT";
+        printCookies("Invalid expiry (missing year)");
+        deleteCookie("cookie");
+    };
+
+    asyncTest(done => {
+        basicTest();
+        multipleCookiesTest();
+
+        largeValueTest();
+        overlyLargeValueTest();
+
+        httpOnlyTest();
+        publicSuffixTest();
+        sameSiteTest();
+
+        maxAgeTest1();
+        expiresTest1();
+
+        setTimeout(() => {
+            maxAgeTest2();
+            expiresTest2();
+
+            maxAgeInPastTest();
+            expiresInPastTest();
+            invalidExpiryTest();
+
+            done();
+        }, 1200);
+    });
+</script>
