diff --git a/implementation-contributed/v8/intl/date-format/resolved-options-unwrap.js b/implementation-contributed/v8/intl/date-format/resolved-options-unwrap.js
new file mode 100644
index 0000000000..2aa4064802
--- /dev/null
+++ b/implementation-contributed/v8/intl/date-format/resolved-options-unwrap.js
@@ -0,0 +1,11 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Test the Intl.DateTimeFormat.prototype.resolvedOptions will properly handle
+// 3. Let dtf be ? UnwrapDateTimeFormat(dtf).
+var x = Object.create(Intl.DateTimeFormat.prototype);
+x = Intl.DateTimeFormat.call(x, 'en');
+
+var resolvedOptions = Intl.DateTimeFormat.prototype.resolvedOptions.call(x);
+assertEquals(resolvedOptions.locale, 'en')
diff --git a/implementation-contributed/v8/intl/regress-888299.js b/implementation-contributed/v8/intl/regress-888299.js
new file mode 100644
index 0000000000..abe9d1da34
--- /dev/null
+++ b/implementation-contributed/v8/intl/regress-888299.js
@@ -0,0 +1,7 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var i = 0;
+new Intl.DateTimeFormat(
+    undefined, { get hour() {  if (i == 0) { i = 1; return 'numeric'} } });
diff --git a/implementation-contributed/v8/mjsunit/compiler/regress-888923.js b/implementation-contributed/v8/mjsunit/compiler/regress-888923.js
new file mode 100644
index 0000000000..e352673b7d
--- /dev/null
+++ b/implementation-contributed/v8/mjsunit/compiler/regress-888923.js
@@ -0,0 +1,31 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+(function() {
+  function f(o) {
+    o.x;
+    Object.create(o);
+    return o.y.a;
+  }
+
+  f({ x : 0, y : { a : 1 } });
+  f({ x : 0, y : { a : 2 } });
+  %OptimizeFunctionOnNextCall(f);
+  assertEquals(3, f({ x : 0, y : { a : 3 } }));
+})();
+
+(function() {
+  function f(o) {
+    let a = o.y;
+    Object.create(o);
+    return o.x + a;
+  }
+
+  f({ x : 42, y : 21 });
+  f({ x : 42, y : 21 });
+  %OptimizeFunctionOnNextCall(f);
+  assertEquals(63, f({ x : 42, y : 21 }));
+})();
diff --git a/implementation-contributed/v8/test262/test262.status b/implementation-contributed/v8/test262/test262.status
index a2cc51b1ea..c6f0e34e6d 100644
--- a/implementation-contributed/v8/test262/test262.status
+++ b/implementation-contributed/v8/test262/test262.status
@@ -502,17 +502,8 @@
   'built-ins/TypedArray/prototype/set/typedarray-arg-set-values-same-buffer-same-type-sab': ['--harmony-sharedarraybuffer'],
 
   # https://bugs.chromium.org/p/v8/issues/detail?id=8100
-  'built-ins/Atomics/add/bigint/*': [SKIP],
-  'built-ins/Atomics/and/bigint/*': [SKIP],
-  'built-ins/Atomics/compareExchange/bigint/*': [SKIP],
-  'built-ins/Atomics/exchange/bigint/*': [SKIP],
-  'built-ins/Atomics/load/bigint/*': [SKIP],
   'built-ins/Atomics/notify/bigint/*': [SKIP],
-  'built-ins/Atomics/or/bigint/*': [SKIP],
-  'built-ins/Atomics/store/bigint/*': [SKIP],
-  'built-ins/Atomics/sub/bigint/*': [SKIP],
   'built-ins/Atomics/wait/bigint/*': [SKIP],
-  'built-ins/Atomics/xor/bigint/*': [SKIP],
 
   # https://bugs.chromium.org/p/v8/issues/detail?id=6049
   'built-ins/Object/internals/DefineOwnProperty/consistent-value-function-caller': [FAIL_SLOPPY],