diff --git a/node/node-tests.ts b/node/node-tests.ts
index 9aebe5c53..8faf5fed6 100644
--- a/node/node-tests.ts
+++ b/node/node-tests.ts
@@ -134,6 +134,7 @@ function bufferTests() {
     var base64Buffer = new Buffer('','base64');
     var octets: Uint8Array = null;
     var octetBuffer = new Buffer(octets);
+    var copiedBuffer = new Buffer(utf8Buffer);
     console.log(Buffer.isBuffer(octetBuffer));
     console.log(Buffer.isEncoding('utf8'));
     console.log(Buffer.byteLength('xyz123'));
@@ -159,6 +160,15 @@ function bufferTests() {
 
     // fill returns the input buffer.
     b.fill('a').fill('b');
+   
+    {
+        let buffer = new Buffer('123');
+        let index: number;
+        index = buffer.indexOf("23");
+        index = buffer.indexOf("23", 1);
+        index = buffer.indexOf(23);
+        index = buffer.indexOf(buffer);
+    }
 }
 
 
diff --git a/node/node.d.ts b/node/node.d.ts
index a7f1a1617..928b823e5 100644
--- a/node/node.d.ts
+++ b/node/node.d.ts
@@ -113,6 +113,12 @@ declare var Buffer: {
      * @param array The octets to store.
      */
     new (array: any[]): Buffer;
+    /**
+     * Copies the passed {buffer} data onto a new {Buffer} instance.
+     *
+     * @param buffer The buffer to copy.
+     */
+    new (buffer: Buffer): Buffer;
     prototype: Buffer;
     /**
      * Returns true if {obj} is a Buffer
@@ -395,6 +401,7 @@ interface NodeBuffer {
     writeDoubleLE(value: number, offset: number, noAssert?: boolean): number;
     writeDoubleBE(value: number, offset: number, noAssert?: boolean): number;
     fill(value: any, offset?: number, end?: number): Buffer;
+    indexOf(value: string | number | Buffer, byteOffset?: number): number;
 }
 
 /************************************************