diff --git a/src/Compress/Bz2.php b/src/Compress/Bz2.php
index 1e37109a..79716118 100644
--- a/src/Compress/Bz2.php
+++ b/src/Compress/Bz2.php
@@ -133,7 +133,9 @@ public function compress($content)
     public function decompress($content)
     {
         $archive = $this->getArchive();
-        if (file_exists($content)) {
+
+        //check if there are null byte characters before doing a file_exists check
+        if (!strstr($content, "\0") && file_exists($content)) {
             $archive = $content;
         }
 
diff --git a/src/Compress/Gz.php b/src/Compress/Gz.php
index cb1c47dc..57d05dfd 100644
--- a/src/Compress/Gz.php
+++ b/src/Compress/Gz.php
@@ -165,7 +165,9 @@ public function decompress($content)
     {
         $archive = $this->getArchive();
         $mode    = $this->getMode();
-        if (file_exists($content)) {
+
+        //check if there are null byte characters before doing a file_exists check
+        if (!strstr($content, "\0") && file_exists($content)) {
             $archive = $content;
         }
 
diff --git a/test/Compress/Bz2Test.php b/test/Compress/Bz2Test.php
index 0b62f232..645a9099 100644
--- a/test/Compress/Bz2Test.php
+++ b/test/Compress/Bz2Test.php
@@ -37,10 +37,6 @@ public function tearDown()
      */
     public function testBasicUsage()
     {
-        if (version_compare(phpversion(), '5.4', '>=')) {
-            $this->markTestIncomplete('Code to test is not compatible with PHP 5.4 ');
-        }
-
         $filter  = new Bz2Compression();
 
         $content = $filter->compress('compress me');
diff --git a/test/Compress/GzTest.php b/test/Compress/GzTest.php
index 51d9602d..1f901bca 100644
--- a/test/Compress/GzTest.php
+++ b/test/Compress/GzTest.php
@@ -37,10 +37,6 @@ public function tearDown()
      */
     public function testBasicUsage()
     {
-        if (version_compare(phpversion(), '5.4', '>=')) {
-            $this->markTestIncomplete('Code to test is not compatible with PHP 5.4 ');
-        }
-
         $filter  = new GzCompression();
 
         $content = $filter->compress('compress me');
@@ -164,10 +160,6 @@ public function testGzCompressToFile()
      */
     public function testGzDeflate()
     {
-        if (version_compare(phpversion(), '5.4', '>=')) {
-            $this->markTestIncomplete('Code to test is not compatible with PHP 5.4 ');
-        }
-
         $filter  = new GzCompression(array('mode' => 'deflate'));
 
         $content = $filter->compress('compress me');
diff --git a/test/CompressTest.php b/test/CompressTest.php
index fbcd47c1..2aed886d 100644
--- a/test/CompressTest.php
+++ b/test/CompressTest.php
@@ -37,10 +37,6 @@ public function tearDown()
      */
     public function testBasicUsage()
     {
-        if (version_compare(phpversion(), '5.4', '>=')) {
-            $this->markTestIncomplete('Code to test is not compatible with PHP 5.4 ');
-        }
-
         $filter  = new CompressFilter('bz2');
 
         $text     = 'compress me';
diff --git a/test/DecompressTest.php b/test/DecompressTest.php
index cc46b531..b6e94752 100644
--- a/test/DecompressTest.php
+++ b/test/DecompressTest.php
@@ -37,10 +37,6 @@ public function tearDown()
      */
     public function testBasicUsage()
     {
-        if (version_compare(phpversion(), '5.4', '>=')) {
-            $this->markTestIncomplete('Code to test is not compatible with PHP 5.4 ');
-        }
-
         $filter  = new DecompressFilter('bz2');
 
         $text       = 'compress me';
diff --git a/test/Encrypt/BlockCipherTest.php b/test/Encrypt/BlockCipherTest.php
index 2273cfbe..53759f2c 100644
--- a/test/Encrypt/BlockCipherTest.php
+++ b/test/Encrypt/BlockCipherTest.php
@@ -200,10 +200,6 @@ public function testSettingEmptyVector()
      */
     public function testEncryptionWithDecryptionAndCompressionMcrypt()
     {
-        if (version_compare(phpversion(), '5.4', '>=')) {
-            $this->markTestIncomplete('Code to test is not compatible with PHP 5.4 ');
-        }
-
         if (!extension_loaded('bz2')) {
             $this->markTestSkipped('This adapter needs the bz2 extension');
         }
diff --git a/test/Encrypt/OpensslTest.php b/test/Encrypt/OpensslTest.php
index 972946ed..e7f214c3 100644
--- a/test/Encrypt/OpensslTest.php
+++ b/test/Encrypt/OpensslTest.php
@@ -274,10 +274,6 @@ public function testEncryptionWithDecryptionWithPackagedKeys()
      */
     public function testEncryptionWithDecryptionAndCompressionWithPackagedKeys()
     {
-        if (version_compare(phpversion(), '5.4', '>=')) {
-            $this->markTestIncomplete('Code to test is not compatible with PHP 5.4 ');
-        }
-
         if (!extension_loaded('bz2')) {
             $this->markTestSkipped('Bz2 extension for compression test needed');
         }