diff --git a/document-policy/experimental-features/document-domain/document-domain.tentative.sub.html b/document-policy/experimental-features/document-domain/document-domain.tentative.sub.html
deleted file mode 100644
index 65de95c9a3899a..00000000000000
--- a/document-policy/experimental-features/document-domain/document-domain.tentative.sub.html
+++ /dev/null
@@ -1,52 +0,0 @@
-<!DOCTYPE html>
-
-<body>
-  <script src="/resources/testharness.js"></script>
-  <script src="/resources/testharnessreport.js"></script>
-
-  <script>
-    document.domain = "{{host}}";
-
-    async_test(t => {
-      const iframe = document.createElement('iframe');
-      iframe.src = "//{{domains[www1]}}:{{location[port]}}/document-policy/experimental-features/document-domain/resources/document-domain-enabled.html";
-      iframe.onload = () => {
-        iframe.contentWindow.postMessage({
-          type: "set document.domain",
-          newValue: "{{host}}"
-        }, "*");
-      };
-
-      window.addEventListener('message', t.step_func(e => {
-        if (e.source == iframe.contentWindow) {
-          assert_equals(e.data.oldDomain, "{{domains[www1]}}");
-          assert_equals(e.data.newDomain, "{{host}}");
-          t.done();
-        }
-      }));
-
-      document.body.appendChild(iframe);
-    }, 'document.domain should be enabled in subframe.');
-
-    async_test(t => {
-      const iframe = document.createElement('iframe');
-      iframe.src = "//{{domains[www1]}}:{{location[port]}}/document-policy/experimental-features/document-domain/resources/document-domain-disabled.html";
-      iframe.onload = () => {
-        iframe.contentWindow.postMessage({
-          type: "set document.domain",
-          newValue: "{{host}}"
-        }, "*");
-      };
-
-      window.addEventListener('message', t.step_func(e => {
-        if (e.source == iframe.contentWindow) {
-          assert_equals(e.data.oldDomain, "{{domains[www1]}}");
-          assert_equals(e.data.newDomain, "{{domains[www1]}}");
-          t.done();
-        }
-      }));
-
-      document.body.appendChild(iframe);
-    }, 'document.domain should be disabled in subframe.');
-  </script>
-</body>
diff --git a/document-policy/experimental-features/document-domain/resources/document-domain-disabled.html b/document-policy/experimental-features/document-domain/resources/document-domain-disabled.html
deleted file mode 100644
index 124ee143eee08b..00000000000000
--- a/document-policy/experimental-features/document-domain/resources/document-domain-disabled.html
+++ /dev/null
@@ -1,15 +0,0 @@
-<!DOCTYPE html>
-<body>
-  <script>
-    window.onmessage = e => {
-      if (e.data.type === "set document.domain") {
-        oldDomain = document.domain;
-        document.domain = e.data.newValue;
-        e.source.postMessage({
-          oldDomain,
-          newDomain: document.domain
-        }, "*");
-      }
-    };
-  </script>
-</body>
diff --git a/document-policy/experimental-features/document-domain/resources/document-domain-disabled.html.headers b/document-policy/experimental-features/document-domain/resources/document-domain-disabled.html.headers
deleted file mode 100644
index 57b46a600c0f4d..00000000000000
--- a/document-policy/experimental-features/document-domain/resources/document-domain-disabled.html.headers
+++ /dev/null
@@ -1 +0,0 @@
-Document-Policy: document-domain=?0
\ No newline at end of file
diff --git a/document-policy/experimental-features/document-domain/resources/document-domain-enabled.html b/document-policy/experimental-features/document-domain/resources/document-domain-enabled.html
deleted file mode 100644
index fe03af0dbbe5db..00000000000000
--- a/document-policy/experimental-features/document-domain/resources/document-domain-enabled.html
+++ /dev/null
@@ -1,16 +0,0 @@
-<!DOCTYPE html>
-<body>
-  <script>
-    window.onmessage = e => {
-      if (e.data.type === "set document.domain") {
-        oldDomain = document.domain;
-        document.domain = e.data.newValue;
-        e.source.postMessage({
-          oldDomain,
-          newDomain: document.domain
-        }, "*");
-      }
-    };
-  </script>
-</body>
-
diff --git a/document-policy/experimental-features/document-domain/resources/document-domain-enabled.html.headers b/document-policy/experimental-features/document-domain/resources/document-domain-enabled.html.headers
deleted file mode 100644
index 89ccbe756dfb39..00000000000000
--- a/document-policy/experimental-features/document-domain/resources/document-domain-enabled.html.headers
+++ /dev/null
@@ -1 +0,0 @@
-Document-Policy: document-domain
\ No newline at end of file
diff --git a/html/browsers/origin/relaxing-the-same-origin-restriction/document_domain_feature_policy.tentative.sub.html b/html/browsers/origin/relaxing-the-same-origin-restriction/document_domain_feature_policy.tentative.sub.html
deleted file mode 100644
index e50e5e1657f11c..00000000000000
--- a/html/browsers/origin/relaxing-the-same-origin-restriction/document_domain_feature_policy.tentative.sub.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<!DOCTYPE html>
-<body>
-  <script src=/resources/testharness.js></script>
-  <script src=/resources/testharnessreport.js></script>
-  <script src=/feature-policy/resources/featurepolicy.js></script>
-  <script>
-  run_all_fp_tests_allow_all(
-      'http://{{domains[www]}}:{{ports[http][0]}}',
-      'document-domain',
-      'SecurityError',
-      () => {
-        return new Promise((resolve, reject) => {
-          try {
-            document.domain = "{{domains[]}}";
-            resolve();
-          } catch(e) {
-            reject(e);
-          }
-       });
-      });
-  </script>
-</body>
