diff --git a/test/built-ins/Atomics/add/descriptor.js b/test/built-ins/Atomics/add/descriptor.js
index 93422391d4..d5e28f040d 100644
--- a/test/built-ins/Atomics/add/descriptor.js
+++ b/test/built-ins/Atomics/add/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/and/descriptor.js b/test/built-ins/Atomics/and/descriptor.js
index 7093525ba7..6e78a6a1ed 100644
--- a/test/built-ins/Atomics/and/descriptor.js
+++ b/test/built-ins/Atomics/and/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/compareExchange/descriptor.js b/test/built-ins/Atomics/compareExchange/descriptor.js
index 78f78fd645..de399b2f2c 100644
--- a/test/built-ins/Atomics/compareExchange/descriptor.js
+++ b/test/built-ins/Atomics/compareExchange/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/exchange/descriptor.js b/test/built-ins/Atomics/exchange/descriptor.js
index 1133486729..b65ea64f17 100644
--- a/test/built-ins/Atomics/exchange/descriptor.js
+++ b/test/built-ins/Atomics/exchange/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/isLockFree/descriptor.js b/test/built-ins/Atomics/isLockFree/descriptor.js
index 30bf266e12..d9c786c8ce 100644
--- a/test/built-ins/Atomics/isLockFree/descriptor.js
+++ b/test/built-ins/Atomics/isLockFree/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/load/descriptor.js b/test/built-ins/Atomics/load/descriptor.js
index ef6f55b41d..65002a23d9 100644
--- a/test/built-ins/Atomics/load/descriptor.js
+++ b/test/built-ins/Atomics/load/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/or/descriptor.js b/test/built-ins/Atomics/or/descriptor.js
index 26b7163e32..f074365a8c 100644
--- a/test/built-ins/Atomics/or/descriptor.js
+++ b/test/built-ins/Atomics/or/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/store/descriptor.js b/test/built-ins/Atomics/store/descriptor.js
index a76ea756a3..342f7827bc 100644
--- a/test/built-ins/Atomics/store/descriptor.js
+++ b/test/built-ins/Atomics/store/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/sub/descriptor.js b/test/built-ins/Atomics/sub/descriptor.js
index e4e8dae4d5..8d81ad48a5 100644
--- a/test/built-ins/Atomics/sub/descriptor.js
+++ b/test/built-ins/Atomics/sub/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/wait/descriptor.js b/test/built-ins/Atomics/wait/descriptor.js
index 314eacf92a..bfa9f3ac94 100644
--- a/test/built-ins/Atomics/wait/descriptor.js
+++ b/test/built-ins/Atomics/wait/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/wake/descriptor.js b/test/built-ins/Atomics/wake/descriptor.js
index 3c39094c7f..395b3c35f5 100644
--- a/test/built-ins/Atomics/wake/descriptor.js
+++ b/test/built-ins/Atomics/wake/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.
 
diff --git a/test/built-ins/Atomics/xor/descriptor.js b/test/built-ins/Atomics/xor/descriptor.js
index b1e1b710f2..f837f67f51 100644
--- a/test/built-ins/Atomics/xor/descriptor.js
+++ b/test/built-ins/Atomics/xor/descriptor.js
@@ -1,4 +1,3 @@
-// Copyright 2015 Microsoft Corporation. All rights reserved.
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the license found in the LICENSE file.