diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 0304cf7532d..7f95b602122 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -37713,7 +37713,16 @@
   "local_changes": {
     "deleted": [],
     "deleted_reftests": {},
-    "items": {},
+    "items": {
+      "testharness": {
+        "html/semantics/forms/the-select-element/common-HTMLOptionsCollection-add.html": [
+          {
+            "path": "html/semantics/forms/the-select-element/common-HTMLOptionsCollection-add.html",
+            "url": "/html/semantics/forms/the-select-element/common-HTMLOptionsCollection-add.html"
+          }
+        ]
+      }
+    },
     "reftest_nodes": {}
   },
   "reftest_nodes": {
diff --git a/tests/wpt/metadata/html/dom/interfaces.html.ini b/tests/wpt/metadata/html/dom/interfaces.html.ini
index 85354ada30b..9b6a26bfa3b 100644
--- a/tests/wpt/metadata/html/dom/interfaces.html.ini
+++ b/tests/wpt/metadata/html/dom/interfaces.html.ini
@@ -1083,27 +1083,6 @@
   [HTMLCollection interface: calling namedItem(DOMString) on document.createElement("form").elements with too few arguments must throw TypeError]
     expected: FAIL
 
-  [HTMLOptionsCollection interface: existence and properties of interface object]
-    expected: FAIL
-
-  [HTMLOptionsCollection interface object length]
-    expected: FAIL
-
-  [HTMLOptionsCollection interface: existence and properties of interface prototype object]
-    expected: FAIL
-
-  [HTMLOptionsCollection interface: existence and properties of interface prototype object's "constructor" property]
-    expected: FAIL
-
-  [HTMLOptionsCollection interface: attribute length]
-    expected: FAIL
-
-  [HTMLOptionsCollection interface: operation add([object Object\],[object Object\],[object Object\],[object Object\])]
-    expected: FAIL
-
-  [HTMLOptionsCollection interface: operation remove(long)]
-    expected: FAIL
-
   [HTMLOptionsCollection interface: attribute selectedIndex]
     expected: FAIL
 
@@ -3747,18 +3726,6 @@
   [HTMLSelectElement interface: attribute required]
     expected: FAIL
 
-  [HTMLSelectElement interface: attribute options]
-    expected: FAIL
-
-  [HTMLSelectElement interface: operation namedItem(DOMString)]
-    expected: FAIL
-
-  [HTMLSelectElement interface: operation remove()]
-    expected: FAIL
-
-  [HTMLSelectElement interface: operation remove(long)]
-    expected: FAIL
-
   [HTMLSelectElement interface: attribute selectedOptions]
     expected: FAIL
 
@@ -3792,15 +3759,6 @@
   [HTMLSelectElement interface: document.createElement("select") must inherit property "required" with the proper type (6)]
     expected: FAIL
 
-  [HTMLSelectElement interface: document.createElement("select") must inherit property "options" with the proper type (9)]
-    expected: FAIL
-
-  [HTMLSelectElement interface: document.createElement("select") must inherit property "namedItem" with the proper type (12)]
-    expected: FAIL
-
-  [HTMLSelectElement interface: calling namedItem(DOMString) on document.createElement("select") with too few arguments must throw TypeError]
-    expected: FAIL
-
   [HTMLSelectElement interface: document.createElement("select") must inherit property "selectedOptions" with the proper type (17)]
     expected: FAIL
 
@@ -6456,9 +6414,6 @@
   [HTMLAllCollection interface object name]
     expected: FAIL
 
-  [HTMLOptionsCollection interface object name]
-    expected: FAIL
-
   [HTMLPropertiesCollection interface object name]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/infrastructure/common-dom-interfaces/collections/htmloptionscollection.html.ini b/tests/wpt/metadata/html/infrastructure/common-dom-interfaces/collections/htmloptionscollection.html.ini
index a823a4e45d3..eb045799edd 100644
--- a/tests/wpt/metadata/html/infrastructure/common-dom-interfaces/collections/htmloptionscollection.html.ini
+++ b/tests/wpt/metadata/html/infrastructure/common-dom-interfaces/collections/htmloptionscollection.html.ini
@@ -1,14 +1,5 @@
 [htmloptionscollection.html]
   type: testharness
-  [Original length]
-    expected: FAIL
-
-  [Setting length to original value has no effect]
-    expected: FAIL
-
-  [Setting length to shorter value]
-    expected: FAIL
-
   [Setting length to longer value]
     expected: FAIL
 
@@ -24,48 +15,5 @@
   [Insert <optgroup><optgroup><option>6</option></optgroup></optgroup> into <select>]
     expected: FAIL
 
-  [namedItem id attribute]
-    expected: FAIL
-
-  [namedItem name attribute]
-    expected: FAIL
-
-  [namedItem doesn't match anything]
-    expected: FAIL
-
-  [namedItem multiple IDs]
-    expected: FAIL
-
-  [namedItem multiple names]
-    expected: FAIL
-
-  [namedItem multiple name and ID]
-    expected: FAIL
-
-  [namedItem multiple name and ID with multiple attributes]
-    expected: FAIL
-
-  [namedItem id attribute multiple attributes one element]
-    expected: FAIL
-
-  [namedItem name attribute multiple attributes one element]
-    expected: FAIL
-
-  [HTMLOptionsCollection [index\] method return the item with index]
-    expected: FAIL
-
-  [HTMLOptionsCollection [name\] method return the item with name]
-    expected: FAIL
-
-  [HTMLOptionsCollection.item(index) method return the item with index]
-    expected: FAIL
-
-  [HTMLOptionsCollection.item(name) method return the item with index 0]
-    expected: FAIL
-
   [HTMLOptionsCollection.add method insert HTMLOptionElement Option element]
     expected: FAIL
-
-  [HTMLOptionsCollection.remove method remove Option element by index]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/semantics/forms/the-select-element/common-HTMLOptionsCollection-namedItem.html.ini b/tests/wpt/metadata/html/semantics/forms/the-select-element/common-HTMLOptionsCollection-namedItem.html.ini
deleted file mode 100644
index 0ee0497fe2f..00000000000
--- a/tests/wpt/metadata/html/semantics/forms/the-select-element/common-HTMLOptionsCollection-namedItem.html.ini
+++ /dev/null
@@ -1,29 +0,0 @@
-[common-HTMLOptionsCollection-namedItem.html]
-  type: testharness
-  [if only one item has a *name* or id value matching the parameter, return that object and stop]
-    expected: FAIL
-
-  [if only one item has a name or *id* value matching the parameter, return that object and stop]
-    expected: FAIL
-
-  [if no item has a name or id value matching the parameter, return null and stop]
-    expected: FAIL
-
-  [return an HTMLOptionsCollection in correct order for repeated 'id' value]
-    expected: FAIL
-
-  [return an HTMLOptionsCollection in correct order for repeated 'name' value]
-    expected: FAIL
-
-  [return an HTMLOptionsCollection in correct order for repeated mixed value]
-    expected: FAIL
-
-  [if multiple items have a name or *id* value matching the parameter, return the first object and stop]
-    expected: FAIL
-
-  [if multiple items have a *name* or id value matching the parameter, return the first object and stop]
-    expected: FAIL
-
-  [if multiple items have a *name* or *id* value matching the parameter, return the first object and stop]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/semantics/forms/the-select-element/select-named-getter.html.ini b/tests/wpt/metadata/html/semantics/forms/the-select-element/select-named-getter.html.ini
deleted file mode 100644
index 57f6858aa5f..00000000000
--- a/tests/wpt/metadata/html/semantics/forms/the-select-element/select-named-getter.html.ini
+++ /dev/null
@@ -1,14 +0,0 @@
-[select-named-getter.html]
-  type: testharness
-  [Option with id]
-    expected: FAIL
-
-  [Option with name]
-    expected: FAIL
-
-  [Option with name and id]
-    expected: FAIL
-
-  [Empty string name]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/semantics/forms/the-select-element/select-remove.html.ini b/tests/wpt/metadata/html/semantics/forms/the-select-element/select-remove.html.ini
deleted file mode 100644
index b75d748207b..00000000000
--- a/tests/wpt/metadata/html/semantics/forms/the-select-element/select-remove.html.ini
+++ /dev/null
@@ -1,8 +0,0 @@
-[select-remove.html]
-  type: testharness
-  [select.remove(n) should work]
-    expected: FAIL
-
-  [select.options.remove(n) should work]
-    expected: FAIL
-
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-select-element/common-HTMLOptionsCollection-add.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-select-element/common-HTMLOptionsCollection-add.html
new file mode 100644
index 00000000000..cf4306e2711
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-select-element/common-HTMLOptionsCollection-add.html
@@ -0,0 +1,89 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title id='title'>HTMLOptionsCollection</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+<div id="log"></div>
+<select id="selly">
+  <option id="id1" name="name1">1</option>
+  <option id="id2" name="name2">2</option>
+  <option id="id3" name="name3">3</option>
+  <option id="id4" name="name4">4</option>
+  <optgroup id="og1">
+    <option name="nameonly">n1</option>
+    <option id="id5">5</option>
+  </optgroup>
+  <optgroup id="og2">
+    <option name="nameonly">n2</option>
+    <option id="id6">6</option>
+  </optgroup>
+
+</select>
+
+<script>
+var selly;
+setup(function() {
+    selly = document.getElementById('selly');
+});
+
+test(function () {
+    var option = document.getElementById('id1');
+    var optgroup = document.getElementById('og1');
+    selly.options.add(option, option);
+    selly.options.add(optgroup, optgroup);
+    assert_equals(selly.children.length, 6);
+    assert_equals(selly.length, 8);
+}, "if before and node are the same element nothing should be done");
+
+test(function () {
+    var o1 = document.createElement("option");
+    o1.value = "a";
+    var o2 = document.createElement("option");
+    o2.value = "b";
+    var o3 = document.createElement("option");
+    o3.value = "c";
+    var optgroup = document.getElementById('og1');
+    selly.options.add(o1, null);
+    selly.options.add(o2, optgroup);
+    selly.options.add(o3, 0);
+
+    var elarray = [];
+    for (var i = 0; i < selly.length; i++) {
+        elarray.push(selly[i].value);
+    }
+    assert_array_equals(elarray, ["c", "1", "2", "3", "4", "b", "n1", "5", "n2", "6", "a"]);
+}, "add method should add option elements correctly");
+
+test(function () {
+    var og1 = document.createElement("optgroup");
+    var o1 = document.createElement("option");
+    o1.value = "a";
+    o1.appendChild(og1);
+    var og2 = document.createElement("optgroup");
+    var o2 = document.createElement("option");
+    o2.value = "b";
+    o2.appendChild(og2);
+    var og3 = document.createElement("optgroup");
+    var o3 = document.createElement("option");
+    o3.value = "c";
+    o3.appendChild(og3);
+
+    var optgroup = document.getElementById('og1');
+    selly.options.add(og1, null);
+    selly.options.add(og2, optgroup);
+    selly.options.add(og3, 0);
+
+    var elarray = [];
+    for (var i = 0; i < selly.length; i++) {
+        elarray.push(selly[i].value);
+    }
+    assert_array_equals(elarray, ["c", "1", "2", "3", "4", "b", "n1", "5", "n2", "6", "a"]);
+}, "add method should add option groups correctly");
+
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-select-element/common-HTMLOptionsCollection.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-select-element/common-HTMLOptionsCollection.html
index 6bae66ccf78..307b73f8722 100644
--- a/tests/wpt/web-platform-tests/html/semantics/forms/the-select-element/common-HTMLOptionsCollection.html
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-select-element/common-HTMLOptionsCollection.html
@@ -67,4 +67,33 @@ test(function () {
     assert_equals(selly.children.length, 4,
                   "Number of children should have changed");
 }, "Setting a length lower than the old length trims nodes from the end");
+
+test(function () {
+    var opts = selly.options;
+    opts[3] = null;
+    assert_equals(selly[3], undefined,
+                  "previously set node is now undefined");
+    assert_equals(selly.length, 3,
+                  "Number of nodes in collection is correctly changed");
+    assert_equals(selly.children.length, 3,
+                  "Number of children should have changed");
+}, "Setting element to null by index removed the element");
+
+test(function () {
+    var opts = selly.options;
+    var new_option = document.createElement("option");
+    var replace_option = new_option.cloneNode(true);
+    new_option.value = "-1";
+    replace_option.value = "a";
+    opts[5] = new_option;
+    opts[0] = replace_option;
+
+    var elarray = [];
+    for (var i = 0; i < selly.length; i++) {
+        elarray.push(selly[i].value);
+    }
+    assert_array_equals(elarray, ["a", "2", "3", "", "", "-1"]);
+
+}, "Setting element by index should correctly append and replace elements");
+
 </script>