diff --git a/src/Ratchet/WebSocket/Version/FrameInterface.php b/src/Ratchet/WebSocket/Version/FrameInterface.php
index 4198985..083b6d4 100644
--- a/src/Ratchet/WebSocket/Version/FrameInterface.php
+++ b/src/Ratchet/WebSocket/Version/FrameInterface.php
@@ -15,7 +15,7 @@ interface FrameInterface extends DataInterface {
     function isFinal();
 
     /**
-     * Was the payload masked?
+     * Is the payload masked?
      * @return bool
      */
     function isMasked();
diff --git a/src/Ratchet/WebSocket/Version/RFC6455/Frame.php b/src/Ratchet/WebSocket/Version/RFC6455/Frame.php
index 93cc68f..4bb39d8 100644
--- a/src/Ratchet/WebSocket/Version/RFC6455/Frame.php
+++ b/src/Ratchet/WebSocket/Version/RFC6455/Frame.php
@@ -127,9 +127,7 @@ class Frame implements FrameInterface {
             throw new \UnderflowException('Not enough bytes received to determine if this is the final frame in message');
         }
 
-        $fbb = sprintf('%08b', ord(substr($this->data, 0, 1)));
-
-        return (boolean)(int)$fbb[0];
+        return 128 === (ord($this->data[0]) & 128);
     }
 
     /**
@@ -141,9 +139,7 @@ class Frame implements FrameInterface {
             throw new \UnderflowException('Not enough bytes received to determine reserved bit');
         }
 
-        $fbb = sprintf('%08b', ord(substr($this->data, 0, 1)));
-
-        return (boolean)(int)$fbb[1];
+        return 64 === (ord($this->data[0]) & 64);
     }
 
     /**
@@ -155,9 +151,7 @@ class Frame implements FrameInterface {
             throw new \UnderflowException('Not enough bytes received to determine reserved bit');
         }
 
-        $fbb = sprintf('%08b', ord(substr($this->data, 0, 1)));
-
-        return (boolean)(int)$fbb[2];
+        return 32 === (ord($this->data[0]) & 32);
     }
 
     /**
@@ -169,9 +163,7 @@ class Frame implements FrameInterface {
             throw new \UnderflowException('Not enough bytes received to determine reserved bit');
         }
 
-        $fbb = sprintf('%08b', ord(substr($this->data, 0, 1)));
-
-        return (boolean)(int)$fbb[3];
+        return 16 == (ord($this->data[0]) & 16);
     }
 
     /**
@@ -182,7 +174,7 @@ class Frame implements FrameInterface {
             throw new \UnderflowException("Not enough bytes received ({$this->bytesRecvd}) to determine if mask is set");
         }
 
-        return (boolean)bindec(substr(sprintf('%08b', ord(substr($this->data, 1, 1))), 0, 1));
+        return 128 === (ord($this->data[1]) & 128);
     }
 
     /**
diff --git a/tests/Ratchet/Tests/WebSocket/Version/RFC6455/FrameTest.php b/tests/Ratchet/Tests/WebSocket/Version/RFC6455/FrameTest.php
index 18a6249..d90f984 100644
--- a/tests/Ratchet/Tests/WebSocket/Version/RFC6455/FrameTest.php
+++ b/tests/Ratchet/Tests/WebSocket/Version/RFC6455/FrameTest.php
@@ -66,22 +66,42 @@ class FrameTest extends \PHPUnit_Framework_TestCase {
      */
     public static function firstByteProvider() {
         return array(
-            array(false, 8,  '00001000')
-          , array(true,  10, '10001010')
-          , array(false, 15, '00001111')
-          , array(true,   1, '10000001')
-          , array(true,  15, '11111111')
+            array(false, false, false, true,   8, '00011000')
+          , array(true,  false, true,  false, 10, '10101010')
+          , array(false, false, false, false, 15, '00001111')
+          , array(true,  false, false, false,  1, '10000001')
+          , array(true,  true,  true,  true,  15, '11111111')
+          , array(true,  true,  false, false,  7, '11000111')
         );
     }
 
     /**
      * @dataProvider firstByteProvider
      */
-    public function testFinCodeFromBits($fin, $opcode, $bin) {
+    public function testFinCodeFromBits($fin, $rsv1, $rsv2, $rsv3, $opcode, $bin) {
         $this->_frame->addBuffer(Frame::encode($bin));
         $this->assertEquals($fin, $this->_frame->isFinal());
     }
 
+    /**
+     * @dataProvider firstByteProvider
+     */
+    public function testGetRsvFromBits($fin, $rsv1, $rsv2, $rsv3, $opcode, $bin) {
+        $this->_frame->addBuffer(Frame::encode($bin));
+
+        $this->assertEquals($rsv1, $this->_frame->getRsv1());
+        $this->assertEquals($rsv2, $this->_frame->getRsv2());
+        $this->assertEquals($rsv3, $this->_frame->getRsv3());
+    }
+
+    /**
+     * @dataProvider firstByteProvider
+     */
+    public function testOpcodeFromBits($fin, $rsv1, $rsv2, $rsv3, $opcode, $bin) {
+        $this->_frame->addBuffer(Frame::encode($bin));
+        $this->assertEquals($opcode, $this->_frame->getOpcode());
+    }
+
     /**
      * @dataProvider UnframeMessageProvider
      */
@@ -90,14 +110,6 @@ class FrameTest extends \PHPUnit_Framework_TestCase {
         $this->assertTrue($this->_frame->isFinal());
     }
 
-    /**
-     * @dataProvider firstByteProvider
-     */
-    public function testOpcodeFromBits($fin, $opcode, $bin) {
-        $this->_frame->addBuffer(Frame::encode($bin));
-        $this->assertEquals($opcode, $this->_frame->getOpcode());
-    }
-
     /**
      * @dataProvider UnframeMessageProvider
      */