diff --git a/harness/atomicsHelper.js b/harness/atomicsHelper.js
index 52650617081a918281fa9bf2d764f0788862d8f5..32f68fb74f912c0f8bbc411e26c4fc4133d41d6d 100644
--- a/harness/atomicsHelper.js
+++ b/harness/atomicsHelper.js
@@ -1,4 +1,4 @@
-// Copyright (C) 2017 Ecma International.  All rights reserved.
+// Copyright (C) 2017 Mozilla Corporation.  All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 description: |
diff --git a/harness/detachArrayBuffer.js b/harness/detachArrayBuffer.js
index df526d6627cd8db4c7accff7628ee3ce821fa6a6..abc737da91d7bf720acb78bbfe7baf2602a4fd80 100644
--- a/harness/detachArrayBuffer.js
+++ b/harness/detachArrayBuffer.js
@@ -1,4 +1,4 @@
-// Copyright (C) 2017 Ecma International.  All rights reserved.
+// Copyright (C) 2016 the V8 project authors.  All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 description: |
diff --git a/harness/nans.js b/harness/nans.js
index d4cc5720d2a845872d47d66f77ea00e8c17ce625..7d127c51f8966168b3fb5f8fd845ea85c78bc578 100644
--- a/harness/nans.js
+++ b/harness/nans.js
@@ -1,4 +1,4 @@
-// Copyright (C) 2017 Ecma International.  All rights reserved.
+// Copyright (C) 2016 the V8 project authors.  All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 description: |
diff --git a/harness/nativeFunctionMatcher.js b/harness/nativeFunctionMatcher.js
index 9b43d8f4d78b8dff9f7b970b5c12d13ebcb292c3..4e02c1e41973e6080cebba394440cc1f4dcea895 100644
--- a/harness/nativeFunctionMatcher.js
+++ b/harness/nativeFunctionMatcher.js
@@ -1,4 +1,4 @@
-// Copyright (C) 2017 Ecma International.  All rights reserved.
+// Copyright (C) 2016 Michael Ficarra.  All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 description: Assert _NativeFunction_ Syntax
diff --git a/harness/proxyTrapsHelper.js b/harness/proxyTrapsHelper.js
index a438be9f05c6103c377792075be40b73c9661125..387581afb11f7c901220ec07d1d4234736f619b2 100644
--- a/harness/proxyTrapsHelper.js
+++ b/harness/proxyTrapsHelper.js
@@ -1,4 +1,4 @@
-// Copyright (C) 2017 Ecma International.  All rights reserved.
+// Copyright (C) 2016 Jordan Harband.  All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 description: |
diff --git a/harness/regExpUtils.js b/harness/regExpUtils.js
index 4dd7ddf13b0c4523cbce947931b1f72d87b0504d..362a6d16604459d8cb866db67b949602b88708a6 100644
--- a/harness/regExpUtils.js
+++ b/harness/regExpUtils.js
@@ -1,4 +1,4 @@
-// Copyright (C) 2017 Ecma International.  All rights reserved.
+// Copyright (C) 2017 Mathias Bynens.  All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 description: |
diff --git a/harness/tcoHelper.js b/harness/tcoHelper.js
index ecae61293432231b04bd085a85f342cd3b49071c..ac092346d6931709d67ac3a4cfd4ee94ded2c558 100644
--- a/harness/tcoHelper.js
+++ b/harness/tcoHelper.js
@@ -1,4 +1,4 @@
-// Copyright (C) 2015 André Bargull. All rights reserved.
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 description: |