diff --git a/feature-policy/feature-policy-frame-policy-allowed-for-all.https.sub.html b/feature-policy/feature-policy-frame-policy-allowed-for-all.https.sub.html
new file mode 100644
index 00000000000000..defe06ffedbb88
--- /dev/null
+++ b/feature-policy/feature-policy-frame-policy-allowed-for-all.https.sub.html
@@ -0,0 +1,84 @@
+<!DOCTYPE html>
+<body>
+  <script src=/resources/testharness.js></script>
+  <script src=/resources/testharnessreport.js></script>
+  <script src=/feature-policy/resources/featurepolicy.js></script>
+  <!-- Feature-Policy: fullscreen *; -->
+  <script>
+  'use strict';
+  var same_origin = 'https://{{domains[]}}:{{ports[https][0]}}';
+  var cross_origin = 'https://{{domains[www]}}:{{ports[https][0]}}';
+  var same_origin_src = '/feature-policy/resources/feature-policy-allowedfeatures.html';
+  var cross_origin_src = cross_origin + same_origin_src;
+  var policies = [
+    {allow: "*", sameOriginTestExpect: true, crossOriginTestExpect: true},
+    {allow: "'self'", sameOriginTestExpect: true, crossOriginTestExpect: false},
+    {allow: "'none'", sameOriginTestExpect: false, crossOriginTestExpect: false},
+    {allow: "'self' " + cross_origin + " https://www.example.com", sameOriginTestExpect: true, crossOriginTestExpect: true}];
+  var pipe_front = '?pipe=sub|header(Feature-Policy,fullscreen ';
+  var pipe_end = ';)';
+  var header_policies = ["*", "'self'", "'none'"];
+
+  // Test that frame.policy inherits from parent's header policy when allow
+  // attribute is not specified.
+  test(function() {
+    test_frame_policy('fullscreen', same_origin_src, true);
+  }, 'Test frame policy on same origin iframe inherit from header policy.');
+  test(function() {
+    test_frame_policy('fullscreen', cross_origin_src, true);
+  }, 'Test frame policy on cross origin iframe inherit from header policy.');
+
+  // Test frame policy with allow attribute set to be one of the policies above.
+  for (var i = 0; i < policies.length; i++) {
+    test(function() {
+      test_frame_policy(
+        'fullscreen', same_origin_src, policies[i].sameOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';');
+    }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow + '".');
+    test(function() {
+      test_frame_policy(
+        'fullscreen', cross_origin_src, policies[i].crossOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';');
+    }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow + '".');
+  }
+
+  // Test that the header policy of the iframe document does not change the
+  // frame policy.
+  for (var i = 0; i < policies.length; i++) {
+    for (var j = 0; j < header_policies.length; j++) {
+      test(function() {
+        test_frame_policy(
+          'fullscreen',
+          same_origin_src + pipe_front + header_policies[j] + pipe_end,
+          policies[i].sameOriginTestExpect,
+          'fullscreen ' + policies[i].allow + ';');
+      }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
+         '" and header policy = "Feature-Policy: fullscreen ' + header_policies[j] + ';".');
+      test(function() {
+        test_frame_policy(
+          'fullscreen',
+          cross_origin_src + pipe_front + header_policies[j] + pipe_end,
+          policies[i].crossOriginTestExpect,
+          'fullscreen ' + policies[i].allow + ';');
+      }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
+         '" and header policy = "Feature-Policy: fullscreen ' + header_policies[j] + ';".');
+    }
+  }
+
+  // Test that the allow attribute overrides allowfullscreen.
+  for (var i = 0; i < policies.length; i++) {
+    test(function() {
+      test_frame_policy(
+        'fullscreen', same_origin_src, policies[i].sameOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';', /*allowfullscreen*/true);
+    }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
+       '" and allowfullscreen.');
+    test(function() {
+      test_frame_policy(
+        'fullscreen', cross_origin_src, policies[i].crossOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';', /*allowfullscreen*/true);
+    }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
+       '" and allowfullscreen.');
+  }
+  </script>
+</body>
diff --git a/feature-policy/feature-policy-frame-policy-allowed-for-all.https.sub.html.sub.headers b/feature-policy/feature-policy-frame-policy-allowed-for-all.https.sub.html.sub.headers
new file mode 100644
index 00000000000000..111121a52fbdc9
--- /dev/null
+++ b/feature-policy/feature-policy-frame-policy-allowed-for-all.https.sub.html.sub.headers
@@ -0,0 +1 @@
+Feature-Policy: fullscreen *;
diff --git a/feature-policy/feature-policy-frame-policy-allowed-for-self.https.sub.html b/feature-policy/feature-policy-frame-policy-allowed-for-self.https.sub.html
new file mode 100644
index 00000000000000..d757d4c4cf518e
--- /dev/null
+++ b/feature-policy/feature-policy-frame-policy-allowed-for-self.https.sub.html
@@ -0,0 +1,84 @@
+<!DOCTYPE html>
+<body>
+  <script src=/resources/testharness.js></script>
+  <script src=/resources/testharnessreport.js></script>
+  <script src=/feature-policy/resources/featurepolicy.js></script>
+  <!-- Feature-Policy: fullscreen 'self'; -->
+  <script>
+  'use strict';
+  var same_origin = 'https://{{domains[]}}:{{ports[https][0]}}';
+  var cross_origin = 'https://{{domains[www]}}:{{ports[https][0]}}';
+  var same_origin_src = '/feature-policy/resources/feature-policy-allowedfeatures.html';
+  var cross_origin_src = cross_origin + same_origin_src;
+  var policies = [
+    {allow: "*", sameOriginTestExpect: true, crossOriginTestExpect: true},
+    {allow: "'self'", sameOriginTestExpect: true, crossOriginTestExpect: false},
+    {allow: "'none'", sameOriginTestExpect: false, crossOriginTestExpect: false},
+    {allow: "'self' " + cross_origin + " https://www.example.com", sameOriginTestExpect: true, crossOriginTestExpect: true}];
+  var pipe_front = '?pipe=sub|header(Feature-Policy,fullscreen ';
+  var pipe_end = ';)';
+  var header_policies = ["*", "'self'", "'none'"];
+
+  // Test that frame.policy inherits from parent's header policy when allow
+  // attribute is not specified.
+  test(function() {
+    test_frame_policy('fullscreen', same_origin_src, true);
+  }, 'Test frame policy on same origin iframe inherit from header policy.');
+  test(function() {
+    test_frame_policy('fullscreen', cross_origin_src, false);
+  }, 'Test frame policy on cross origin iframe inherit from header policy.');
+
+  // Test frame policy with allow attribute set to be one of the policies above.
+  for (var i = 0; i < policies.length; i++) {
+    test(function() {
+      test_frame_policy(
+        'fullscreen', same_origin_src, policies[i].sameOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';');
+    }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow + '".');
+    test(function() {
+      test_frame_policy(
+        'fullscreen', cross_origin_src, policies[i].crossOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';');
+    }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow + '".');
+  }
+
+  // Test that the header policy of the iframe document does not change the
+  // frame policy.
+  for (var i = 0; i < policies.length; i++) {
+    for (var j = 0; j < header_policies.length; j++) {
+      test(function() {
+        test_frame_policy(
+          'fullscreen',
+          same_origin_src + pipe_front + header_policies[j] + pipe_end,
+          policies[i].sameOriginTestExpect,
+          'fullscreen ' + policies[i].allow + ';');
+      }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
+         '" and header policy = "Feature-Policy: fullscreen ' + header_policies[j] + ';".');
+      test(function() {
+        test_frame_policy(
+          'fullscreen',
+          cross_origin_src + pipe_front + header_policies[j] + pipe_end,
+          policies[i].crossOriginTestExpect,
+          'fullscreen ' + policies[i].allow + ';');
+      }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
+         '" and header policy = "Feature-Policy: fullscreen ' + header_policies[j] + ';".');
+    }
+  }
+
+  // Test that the allow attribute overrides allowfullscreen.
+  for (var i = 0; i < policies.length; i++) {
+    test(function() {
+      test_frame_policy(
+        'fullscreen', same_origin_src, policies[i].sameOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';', /*allowfullscreen*/true);
+    }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
+       '" and allowfullscreen.');
+    test(function() {
+      test_frame_policy(
+        'fullscreen', cross_origin_src, policies[i].crossOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';', /*allowfullscreen*/true);
+    }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
+       '" and allowfullscreen.');
+  }
+  </script>
+</body>
diff --git a/feature-policy/feature-policy-frame-policy-allowed-for-self.https.sub.html.sub.headers b/feature-policy/feature-policy-frame-policy-allowed-for-self.https.sub.html.sub.headers
new file mode 100644
index 00000000000000..0cc259b24f3829
--- /dev/null
+++ b/feature-policy/feature-policy-frame-policy-allowed-for-self.https.sub.html.sub.headers
@@ -0,0 +1 @@
+Feature-Policy: fullscreen 'self';
diff --git a/feature-policy/feature-policy-frame-policy-allowed-for-some.https.sub.html b/feature-policy/feature-policy-frame-policy-allowed-for-some.https.sub.html
new file mode 100644
index 00000000000000..f10c66fe0e6133
--- /dev/null
+++ b/feature-policy/feature-policy-frame-policy-allowed-for-some.https.sub.html
@@ -0,0 +1,109 @@
+<!DOCTYPE html>
+<body>
+  <script src=/resources/testharness.js></script>
+  <script src=/resources/testharnessreport.js></script>
+  <script src=/feature-policy/resources/featurepolicy.js></script>
+  <!-- Feature-Policy: fullscreen 'self' cross_origin https://www.example.com; -->
+  <script>
+  'use strict';
+  var same_origin = 'https://{{domains[]}}:{{ports[https][0]}}';
+  var cross_origin = 'https://{{domains[www]}}:{{ports[https][0]}}';
+  var cross_origin1 = 'https://{{domains[www1]}}:{{ports[https][0]}}';
+  var same_origin_src = '/feature-policy/resources/feature-policy-allowedfeatures.html';
+  var cross_origin_src = cross_origin + same_origin_src;
+  var cross_origin_src1 = cross_origin1 + same_origin_src;
+  // Test feature policy with same_origin_src and cross_origin_src.
+  var policies = [
+    {allow: "*", sameOriginTestExpect: true, crossOriginTestExpect: true, crossOrigin1TestExpect: true},
+    {allow: "'self'", sameOriginTestExpect: true, crossOriginTestExpect: false, crossOrigin1TestExpect: false},
+    {allow: "'none'", sameOriginTestExpect: false, crossOriginTestExpect: false, crossOrigin1TestExpect: false},
+    {allow: "'self' " + cross_origin + " https://www.example.com", sameOriginTestExpect: true, crossOriginTestExpect: true, crossOrigin1TestExpect: false}];
+  var pipe_front = '?pipe=sub|header(Feature-Policy,fullscreen ';
+  var pipe_end = ';)';
+  var header_policies = ["*", "'self'", "'none'"];
+
+  // Test that frame.policy inherits from parent's header policy when allow
+  // attribute is not specified.
+  test(function() {
+    test_frame_policy('fullscreen', same_origin_src, true);
+  }, 'Test frame policy on same origin iframe inherit from header policy.');
+  test(function() {
+    test_frame_policy('fullscreen', cross_origin_src, true);
+  }, 'Test frame policy on cross origin iframe inherit from header policy.');
+  test(function() {
+    test_frame_policy('fullscreen', cross_origin_src1, false);
+  }, 'Test frame policy on another cross origin iframe inherit from header policy.');
+
+  // Test frame policy with allow attribute set to be one of the policies above.
+  for (var i = 0; i < policies.length; i++) {
+    test(function() {
+      test_frame_policy(
+        'fullscreen', same_origin_src, policies[i].sameOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';');
+    }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow + '".');
+    test(function() {
+      test_frame_policy(
+        'fullscreen', cross_origin_src, policies[i].crossOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';');
+    }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow + '".');
+    test(function() {
+      test_frame_policy(
+        'fullscreen', cross_origin_src1, policies[i].crossOrigin1TestExpect,
+        'fullscreen ' + policies[i].allow + ';');
+    }, 'Test frame policy on another cross origin iframe with allow = "' + policies[i].allow + '".');
+  }
+
+  // Test that the header policy of the iframe document does not change the
+  // frame policy.
+  for (var i = 0; i < policies.length; i++) {
+    for (var j = 0; j < header_policies.length; j++) {
+      test(function() {
+        test_frame_policy(
+          'fullscreen',
+          same_origin_src + pipe_front + header_policies[j] + pipe_end,
+          policies[i].sameOriginTestExpect,
+          'fullscreen ' + policies[i].allow + ';');
+      }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
+         '" and header policy = "Feature-Policy: fullscreen ' + header_policies[j] + ';".');
+      test(function() {
+        test_frame_policy(
+          'fullscreen',
+          cross_origin_src + pipe_front + header_policies[j] + pipe_end,
+          policies[i].crossOriginTestExpect,
+          'fullscreen ' + policies[i].allow + ';');
+      }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
+         '" and header policy = "Feature-Policy: fullscreen ' + header_policies[j] + ';".');
+      test(function() {
+        test_frame_policy(
+          'fullscreen',
+          cross_origin_src1 + pipe_front + header_policies[j] + pipe_end,
+          policies[i].crossOrigin1TestExpect,
+          'fullscreen ' + policies[i].allow + ';');
+      }, 'Test frame policy on another cross origin iframe with allow = "' + policies[i].allow +
+         '" and header policy = "Feature-Policy: fullscreen ' + header_policies[j] + ';".');
+    }
+  }
+
+  // Test that the allow attribute overrides allowfullscreen.
+  for (var i = 0; i < policies.length; i++) {
+    test(function() {
+      test_frame_policy(
+        'fullscreen', same_origin_src, policies[i].sameOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';', /*allowfullscreen*/true);
+    }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
+       '" and allowfullscreen.');
+    test(function() {
+      test_frame_policy(
+        'fullscreen', cross_origin_src, policies[i].crossOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';', /*allowfullscreen*/true);
+    }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
+       '" and allowfullscreen.');
+    test(function() {
+      test_frame_policy(
+        'fullscreen', cross_origin_src1, policies[i].crossOrigin1TestExpect,
+        'fullscreen ' + policies[i].allow + ';', /*allowfullscreen*/true);
+    }, 'Test frame policy on another cross origin iframe with allow = "' + policies[i].allow +
+       '" and allowfullscreen.');
+  }
+  </script>
+</body>
diff --git a/feature-policy/feature-policy-frame-policy-allowed-for-some.https.sub.html.sub.headers b/feature-policy/feature-policy-frame-policy-allowed-for-some.https.sub.html.sub.headers
new file mode 100644
index 00000000000000..c2493a089031aa
--- /dev/null
+++ b/feature-policy/feature-policy-frame-policy-allowed-for-some.https.sub.html.sub.headers
@@ -0,0 +1 @@
+Feature-Policy: fullscreen 'self' https://{{domains[www]}}:{{ports[https][0]}} https://www.example.com;
diff --git a/feature-policy/feature-policy-frame-policy-disallowed-for-all.https.sub.html b/feature-policy/feature-policy-frame-policy-disallowed-for-all.https.sub.html
new file mode 100644
index 00000000000000..e1178e797d5257
--- /dev/null
+++ b/feature-policy/feature-policy-frame-policy-disallowed-for-all.https.sub.html
@@ -0,0 +1,84 @@
+<!DOCTYPE html>
+<body>
+  <script src=/resources/testharness.js></script>
+  <script src=/resources/testharnessreport.js></script>
+  <script src=/feature-policy/resources/featurepolicy.js></script>
+  <!-- Feature-Policy: fullscreen 'none'; -->
+  <script>
+  'use strict';
+  var same_origin = 'https://{{domains[]}}:{{ports[https][0]}}';
+  var cross_origin = 'https://{{domains[www]}}:{{ports[https][0]}}';
+  var same_origin_src = '/feature-policy/resources/feature-policy-allowedfeatures.html';
+  var cross_origin_src = cross_origin + same_origin_src;
+  var policies = [
+    {allow: "*", sameOriginTestExpect: false, crossOriginTestExpect: false},
+    {allow: "'self'", sameOriginTestExpect: false, crossOriginTestExpect: false},
+    {allow: "'none'", sameOriginTestExpect: false, crossOriginTestExpect: false},
+    {allow: "'self' " + cross_origin + " https://www.example.com", sameOriginTestExpect: false, crossOriginTestExpect: false}];
+  var pipe_front = '?pipe=sub|header(Feature-Policy,fullscreen ';
+  var pipe_end = ';)';
+  var header_policies = ["*", "'self'", "'none'"];
+
+  // Test that frame.policy inherits from parent's header policy when allow
+  // attribute is not specified.
+  test(function() {
+    test_frame_policy('fullscreen', same_origin_src, false);
+  }, 'Test frame policy on same origin iframe inherit from header policy.');
+  test(function() {
+    test_frame_policy('fullscreen', cross_origin_src, false);
+  }, 'Test frame policy on cross origin iframe inherit from header policy.');
+
+  // Test frame policy with allow attribute set to be one of the policies above.
+  for (var i = 0; i < policies.length; i++) {
+    test(function() {
+      test_frame_policy(
+        'fullscreen', same_origin_src, policies[i].sameOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';');
+    }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow + '".');
+    test(function() {
+      test_frame_policy(
+        'fullscreen', cross_origin_src, policies[i].crossOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';');
+    }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow + '".');
+  }
+
+  // Test that the header policy of the iframe document does not change the
+  // frame policy.
+  for (var i = 0; i < policies.length; i++) {
+    for (var j = 0; j < header_policies.length; j++) {
+      test(function() {
+        test_frame_policy(
+          'fullscreen',
+          same_origin_src + pipe_front + header_policies[j] + pipe_end,
+          policies[i].sameOriginTestExpect,
+          'fullscreen ' + policies[i].allow + ';');
+      }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
+         '" and header policy = "Feature-Policy: fullscreen ' + header_policies[j] + ';".');
+      test(function() {
+        test_frame_policy(
+          'fullscreen',
+          cross_origin_src + pipe_front + header_policies[j] + pipe_end,
+          policies[i].crossOriginTestExpect,
+          'fullscreen ' + policies[i].allow + ';');
+      }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
+         '" and header policy = "Feature-Policy: fullscreen ' + header_policies[j] + ';".');
+    }
+  }
+
+  // Test that the allow attribute overrides allowfullscreen.
+  for (var i = 0; i < policies.length; i++) {
+    test(function() {
+      test_frame_policy(
+        'fullscreen', same_origin_src, policies[i].sameOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';', /*allowfullscreen*/true);
+    }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
+       '" and allowfullscreen.');
+    test(function() {
+      test_frame_policy(
+        'fullscreen', cross_origin_src, policies[i].crossOriginTestExpect,
+        'fullscreen ' + policies[i].allow + ';', /*allowfullscreen*/true);
+    }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
+       '" and allowfullscreen.');
+  }
+  </script>
+</body>
diff --git a/feature-policy/feature-policy-frame-policy-disallowed-for-all.https.sub.html.sub.headers b/feature-policy/feature-policy-frame-policy-disallowed-for-all.https.sub.html.sub.headers
new file mode 100644
index 00000000000000..961d40336aeb3e
--- /dev/null
+++ b/feature-policy/feature-policy-frame-policy-disallowed-for-all.https.sub.html.sub.headers
@@ -0,0 +1 @@
+Feature-Policy: fullscreen 'none';
diff --git a/feature-policy/resources/featurepolicy.js b/feature-policy/resources/featurepolicy.js
index 925408ea8a4e50..be8629d153dc08 100644
--- a/feature-policy/resources/featurepolicy.js
+++ b/feature-policy/resources/featurepolicy.js
@@ -383,3 +383,33 @@ function test_subframe_header_policy(
     });
   }, test_name);
 }
+
+// This function tests that frame policy allows a given feature correctly. A
+// feature is allowed in a frame either through inherited policy or specified
+// by iframe allow attribute.
+// Arguments:
+//     feature: feature name.
+//     src: the URL to load in the frame.
+//     test_expect: boolean value of whether the feature should be allowed.
+//     allow: optional, the allow attribute (container policy) of the iframe.
+//     allowfullscreen: optional, boolean value of allowfullscreen attribute.
+function test_frame_policy(
+    feature, src, test_expect, allow, allowfullscreen) {
+  let frame = document.createElement('iframe');
+  document.body.appendChild(frame);
+  // frame_policy should be dynamically updated as allow and allowfullscreen is
+  // updated.
+  var frame_policy = frame.policy;
+  if (typeof allow !== 'undefined') {
+    frame.setAttribute('allow', allow);
+  }
+  if (!!allowfullscreen) {
+    frame.setAttribute('allowfullscreen', true);
+  }
+  frame.src = src;
+  if (test_expect) {
+    assert_true(frame_policy.allowedFeatures().includes(feature));
+  } else {
+    assert_false(frame_policy.allowedFeatures().includes(feature));
+  }
+}
