diff --git a/test/Array/array_splice.js b/test/Array/array_splice.js
index f9599004c18..a0021425f77 100644
--- a/test/Array/array_splice.js
+++ b/test/Array/array_splice.js
@@ -1,5 +1,6 @@
 //-------------------------------------------------------------------------------------------------------
 // Copyright (C) Microsoft. All rights reserved.
+// Copyright (c) ChakraCore Project Contributors. All rights reserved.
 // Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
 //-------------------------------------------------------------------------------------------------------
 
@@ -121,7 +122,7 @@ try
 }
 catch(e)
 {
- if (!e instanceof TypeError) throw(e);
+ if (!(e instanceof TypeError)) throw(e);
  WScript.Echo(y);
  WScript.Echo(x);
 }
@@ -132,7 +133,7 @@ try
 }
 catch(e)
 {
- if (!e instanceof TypeError) throw(e);
+ if (!(e instanceof TypeError)) throw(e);
  WScript.Echo(y);
  WScript.Echo(x);
 }
@@ -143,7 +144,7 @@ try
 }
  catch(e)
 {
- if (!e instanceof TypeError) throw(e);
+ if (!(e instanceof TypeError)) throw(e);
  WScript.Echo(y);
  WScript.Echo(x);
 }
diff --git a/test/Array/array_splice_double.js b/test/Array/array_splice_double.js
index 29d8d744d11..eb97387b5c2 100644
--- a/test/Array/array_splice_double.js
+++ b/test/Array/array_splice_double.js
@@ -1,5 +1,6 @@
 //-------------------------------------------------------------------------------------------------------
 // Copyright (C) Microsoft. All rights reserved.
+// Copyright (c) ChakraCore Project Contributors. All rights reserved.
 // Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
 //-------------------------------------------------------------------------------------------------------
 
@@ -121,7 +122,7 @@ try
 }
 catch(e)
 {
- if (!e instanceof TypeError) throw(e);
+ if (!(e instanceof TypeError)) throw(e);
  WScript.Echo(y);
  WScript.Echo(x);
 }
@@ -132,7 +133,7 @@ try
 }
 catch(e)
 {
- if (!e instanceof TypeError) throw(e);
+ if (!(e instanceof TypeError)) throw(e);
  WScript.Echo(y);
  WScript.Echo(x);
 }
@@ -143,7 +144,7 @@ try
 }
  catch(e)
 {
- if (!e instanceof TypeError) throw(e);
+ if (!(e instanceof TypeError)) throw(e);
  WScript.Echo(y);
  WScript.Echo(x);
 }
diff --git a/test/es5/RegExpStrictDelete.js b/test/es5/RegExpStrictDelete.js
index e2652ed8922..378855fb57b 100644
--- a/test/es5/RegExpStrictDelete.js
+++ b/test/es5/RegExpStrictDelete.js
@@ -1,5 +1,6 @@
 //-------------------------------------------------------------------------------------------------------
 // Copyright (C) Microsoft. All rights reserved.
+// Copyright (c) ChakraCore Project Contributors. All rights reserved.
 // Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
 //-------------------------------------------------------------------------------------------------------
 
@@ -22,7 +23,7 @@ for (var i = 0, len = props.length; i < len; i++)
     }
     catch (err)
     {
-        if (!err instanceof TypeError)
+        if (!(err instanceof TypeError))
             WScript.Echo("Error: strict delete threw a non-TypeError: " + err);
     }
 }