diff --git a/IndexedDB/error-attributes.html b/IndexedDB/error-attributes.html
new file mode 100644
index 00000000000000..33f546496b312d
--- /dev/null
+++ b/IndexedDB/error-attributes.html
@@ -0,0 +1,38 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>IndexedDB: Error attributes are DOMExceptions</title>
+<link rel="help" href="https://w3c.github.io/IndexedDB/#idbrequest">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support.js"></script>
+<script>
+
+indexeddb_test(
+    function(t, db) {
+        db.createObjectStore('store');
+    },
+    function(t, db) {
+        var tx = db.transaction('store', 'readwrite');
+        var store = tx.objectStore('store');
+        var r1 = store.add('value', 'key');
+        r1.onerror = t.unreached_func('first add should succeed');
+
+        var r2 = store.add('value', 'key');
+        r2.onsuccess = t.unreached_func('second add should fail');
+
+        r2.onerror = t.step_func(function() {
+            assert_true(r2.error instanceof DOMException);
+            assert_equals(r2.error.name, 'ConstraintError');
+        });
+
+        tx.oncomplete = t.unreached_func('transaction should not complete');
+        tx.onabort = t.step_func(function() {
+            assert_true(tx.error instanceof DOMException);
+            assert_equals(tx.error.name, 'ConstraintError');
+            t.done();
+        });
+    },
+    'IDBRequest and IDBTransaction error properties should be DOMExceptions'
+);
+
+</script>
diff --git a/IndexedDB/idbcursor-advance-exception-order.html b/IndexedDB/idbcursor-advance-exception-order.html
new file mode 100644
index 00000000000000..13f7fdae5a57a7
--- /dev/null
+++ b/IndexedDB/idbcursor-advance-exception-order.html
@@ -0,0 +1,91 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>IndexedDB: IDBCursor advance() Exception Ordering</title>
+<link rel="help" href="https://w3c.github.io/IndexedDB/#dom-idbcursor-advance">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support.js"></script>
+<script>
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('s');
+    store.put('value', 'key');
+  },
+  (t, db) => {
+    const tx = db.transaction('s');
+    const store = tx.objectStore('s');
+
+    const r = store.openKeyCursor();
+    r.onsuccess = t.step_func(() => {
+      r.onsuccess = null;
+
+      const cursor = r.result;
+
+      setTimeout(t.step_func(() => {
+        assert_throws(new TypeError, () => { cursor.advance(0); },
+                      '"zero" check (TypeError) should precede ' +
+                      '"not active" check (TransactionInactiveError)');
+        t.done();
+      }), 0);
+    });
+  },
+  'IDBCursor.advance exception order: TypeError vs. TransactionInactiveError'
+);
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('s');
+
+    const s = db.createObjectStore('s2');
+    s.put('value', 'key');
+
+    const r = s.openKeyCursor();
+    r.onsuccess = t.step_func(() => {
+      r.onsuccess = null;
+
+      const cursor = r.result;
+      db.deleteObjectStore('s2');
+
+      setTimeout(t.step_func(() => {
+        assert_throws('TransactionInactiveError', () => { cursor.advance(1); },
+                      '"not active" check (TransactionInactiveError) ' +
+                      'should precede "deleted" check (InvalidStateError)');
+        t.done();
+      }), 0);
+    });
+  },
+  (t, db) => {},
+  'IDBCursor.advance exception order: ' +
+  'TransactionInactiveError vs. InvalidStateError #1'
+);
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('s');
+    store.put('value', 'key');
+  },
+  (t, db) => {
+    const tx = db.transaction('s');
+    const store = tx.objectStore('s');
+
+    const r = store.openKeyCursor();
+    r.onsuccess = t.step_func(() => {
+      r.onsuccess = null;
+
+      const cursor = r.result;
+      cursor.advance(1);
+
+      setTimeout(t.step_func(() => {
+        assert_throws('TransactionInactiveError', () => { cursor.advance(1); },
+                      '"not active" check (TransactionInactiveError) ' +
+                      'should precede "got value" check (InvalidStateError)');
+        t.done();
+      }), 0);
+    });
+  },
+  'IDBCursor.advance exception order: ' +
+  'TransactionInactiveError vs. InvalidStateError #2'
+);
+
+</script>
diff --git a/IndexedDB/idbindex-getAll-enforcerange.html b/IndexedDB/idbindex-getAll-enforcerange.html
new file mode 100644
index 00000000000000..d0cbe28872097b
--- /dev/null
+++ b/IndexedDB/idbindex-getAll-enforcerange.html
@@ -0,0 +1,27 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>IndexedDB: IDBIndex getAll() uses [EnforceRange]</title>
+<link rel="help" href="https://w3c.github.io/IndexedDB/#index-interface">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support.js"></script>
+<script>
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('store');
+    const index = store.createIndex('index', 'keyPath');
+  },
+  (t, db) => {
+    const tx = db.transaction('store');
+    const store = tx.objectStore('store');
+    const index = store.index('index');
+    [NaN, Infinity, -Infinity, -1, -Number.MAX_SAFE_INTEGER].forEach(count => {
+      assert_throws(TypeError(), () => { index.getAll(null, count); },
+                    `getAll with count ${count} count should throw TypeError`);
+    });
+    t.done();
+  },
+  `IDBIndex.getAll() uses [EnforceRange]`
+);
+</script>
diff --git a/IndexedDB/idbindex-getAllKeys-enforcerange.html b/IndexedDB/idbindex-getAllKeys-enforcerange.html
new file mode 100644
index 00000000000000..e36a69f495d10d
--- /dev/null
+++ b/IndexedDB/idbindex-getAllKeys-enforcerange.html
@@ -0,0 +1,27 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>IndexedDB: IDBIndex getAllKeys() uses [EnforceRange]</title>
+<link rel="help" href="https://w3c.github.io/IndexedDB/#index-interface">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support.js"></script>
+<script>
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('store');
+    const index = store.createIndex('index', 'keyPath');
+  },
+  (t, db) => {
+    const tx = db.transaction('store');
+    const store = tx.objectStore('store');
+    const index = store.index('index');
+    [NaN, Infinity, -Infinity, -1, -Number.MAX_SAFE_INTEGER].forEach(count => {
+      assert_throws(TypeError(), () => { index.getAllKeys(null, count); },
+                    `getAllKeys with count ${count} count should throw TypeError`);
+    });
+    t.done();
+  },
+  `IDBIndex.getAllKeys() uses [EnforceRange]`
+);
+</script>
diff --git a/IndexedDB/idbobjectstore-getAll-enforcerange.html b/IndexedDB/idbobjectstore-getAll-enforcerange.html
new file mode 100644
index 00000000000000..14e8b27e9013a2
--- /dev/null
+++ b/IndexedDB/idbobjectstore-getAll-enforcerange.html
@@ -0,0 +1,25 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>IndexedDB: IDBObjectStore getAll() uses [EnforceRange]</title>
+<link rel="help" href="https://w3c.github.io/IndexedDB/#object-store-interface">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support.js"></script>
+<script>
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('store');
+  },
+  (t, db) => {
+    const tx = db.transaction('store');
+    const store = tx.objectStore('store');
+    [NaN, Infinity, -Infinity, -1, -Number.MAX_SAFE_INTEGER].forEach(count => {
+      assert_throws(TypeError(), () => { store.getAll(null, count); },
+                    `getAll with count ${count} count should throw TypeError`);
+    });
+    t.done();
+  },
+  `IDBObjectStore.getAll() uses [EnforceRange]`
+);
+</script>
diff --git a/IndexedDB/idbobjectstore-getAllKeys-enforcerange.html b/IndexedDB/idbobjectstore-getAllKeys-enforcerange.html
new file mode 100644
index 00000000000000..15b45ac97d2ba5
--- /dev/null
+++ b/IndexedDB/idbobjectstore-getAllKeys-enforcerange.html
@@ -0,0 +1,25 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>IndexedDB: IDBIObjectStore getAllKeys() uses [EnforceRange]</title>
+<link rel="help" href="https://w3c.github.io/IndexedDB/#object-store-interface">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support.js"></script>
+<script>
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('store');
+  },
+  (t, db) => {
+    const tx = db.transaction('store');
+    const store = tx.objectStore('store');
+    [NaN, Infinity, -Infinity, -1, -Number.MAX_SAFE_INTEGER].forEach(count => {
+      assert_throws(TypeError(), () => { store.getAllKeys(null, count); },
+                    `getAllKeys with count ${count} count should throw TypeError`);
+    });
+    t.done();
+  },
+  `IDBObjectStore.getAllKeys() uses [EnforceRange]`
+);
+</script>
diff --git a/IndexedDB/open-request-queue.html b/IndexedDB/open-request-queue.html
new file mode 100644
index 00000000000000..3a77adbdf8cdd6
--- /dev/null
+++ b/IndexedDB/open-request-queue.html
@@ -0,0 +1,63 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>IndexedDB: open and delete requests are processed as a FIFO queue</title>
+<link rel="help" href="https://w3c.github.io/IndexedDB/#request-connection-queue">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support.js"></script>
+<script>
+
+async_test(t => {
+    let db_name = 'db' + self.location.pathname + '-' + t.name;
+    indexedDB.deleteDatabase(db_name);
+
+    // Open and hold connection while other requests are queued up.
+    let r = indexedDB.open(db_name, 1);
+    r.onerror = t.unreached_func('open should succeed');
+    r.onsuccess = t.step_func(e => {
+        let db = r.result;
+
+        let saw = expect(t, [
+            'open1 success',
+            'open1 versionchange',
+            'delete1 blocked',
+            'delete1 success',
+            'open2 success',
+            'open2 versionchange',
+            'delete2 blocked',
+            'delete2 success'
+        ]);
+
+        function open(token, version) {
+            let r = indexedDB.open(db_name, version);
+            r.onsuccess = t.step_func(e => {
+                saw(token + ' success');
+                let db = r.result;
+                db.onversionchange = t.step_func(e => {
+                    saw(token + ' versionchange');
+                    setTimeout(t.step_func(() => db.close()), 0);
+                });
+            });
+            r.onblocked = t.step_func(e => saw(token + ' blocked'));
+            r.onerror = t.unreached_func('open should succeed');
+        }
+
+        function deleteDatabase(token) {
+            let r = indexedDB.deleteDatabase(db_name);
+            r.onsuccess = t.step_func(e => saw(token + ' success'));
+            r.onblocked = t.step_func(e => saw(token + ' blocked'));
+            r.onerror = t.unreached_func('deleteDatabase should succeed');
+        }
+
+        open('open1', 2);
+        deleteDatabase('delete1');
+        open('open2', 3);
+        deleteDatabase('delete2');
+
+        // Now unblock the queue.
+        db.close();
+    });
+
+}, 'Opens and deletes are processed in order');
+
+</script>
diff --git a/IndexedDB/support.js b/IndexedDB/support.js
index 4bfaf72caa590e..f1c599c07b20c0 100644
--- a/IndexedDB/support.js
+++ b/IndexedDB/support.js
@@ -128,3 +128,18 @@ function indexeddb_test(upgrade_func, open_func, description, options) {
     });
   }, description);
 }
+
+// Call with a Test and an array of expected results in order. Returns
+// a function; call the function when a result arrives and when the
+// expected number appear the order will be asserted and test
+// completed.
+function expect(t, expected) {
+  var results = [];
+  return result => {
+    results.push(result);
+    if (results.length === expected.length) {
+      assert_array_equals(results, expected);
+      t.done();
+    }
+  };
+}
