diff --git a/test/Compress/ZipTest.php b/test/Compress/ZipTest.php
index 0a399ff4..265a8558 100644
--- a/test/Compress/ZipTest.php
+++ b/test/Compress/ZipTest.php
@@ -22,7 +22,7 @@ public function setUp()
             $this->markTestSkipped('This adapter needs the zip extension');
         }
 
-        $this->tmp = sys_get_temp_dir() . '/' . str_replace('\\', '_', __CLASS__);
+        $this->tmp = sys_get_temp_dir() . DIRECTORY_SEPARATOR . str_replace('\\', '_', __CLASS__);
 
         $files = array(
             $this->tmp . '/compressed.zip',
diff --git a/test/File/RenameTest.php b/test/File/RenameTest.php
index c8ede317..a947a9c2 100644
--- a/test/File/RenameTest.php
+++ b/test/File/RenameTest.php
@@ -491,7 +491,7 @@ public function testGetRandomizedFile()
             $filter->getFile()
         );
         $fileNoExt = $this->_filesPath . 'newfile';
-        $this->assertRegExp('#' . $fileNoExt . '_.{13}\.xml#', $filter->getNewName($this->_oldFile));
+        $this->assertRegExp('#' . str_replace('\\', '\\\\', $fileNoExt) . '_.{13}\.xml#', $filter->getNewName($this->_oldFile));
     }
 
     /**
@@ -515,7 +515,7 @@ public function testGetRandomizedFileWithoutExtension()
             )),
             $filter->getFile()
         );
-        $this->assertRegExp('#' . $fileNoExt . '_.{13}#', $filter->getNewName($this->_oldFile));
+        $this->assertRegExp('#' . str_replace('\\', '\\\\', $fileNoExt) . '_.{13}#', $filter->getNewName($this->_oldFile));
     }
 
     /**
diff --git a/test/File/RenameUploadTest.php b/test/File/RenameUploadTest.php
index eb0d2cdc..75bc106b 100644
--- a/test/File/RenameUploadTest.php
+++ b/test/File/RenameUploadTest.php
@@ -66,9 +66,9 @@ public function setUp()
         mkdir($this->_filesPath);
         mkdir($this->_newDir);
 
-        $this->_oldFile    = $this->_filesPath . '/testfile.txt';
-        $this->_newFile    = $this->_filesPath . '/newfile.xml';
-        $this->_newDirFile = $this->_newDir . '/testfile.txt';
+        $this->_oldFile    = $this->_filesPath . DIRECTORY_SEPARATOR . 'testfile.txt';
+        $this->_newFile    = $this->_filesPath . DIRECTORY_SEPARATOR . 'newfile.xml';
+        $this->_newDirFile = $this->_newDir . DIRECTORY_SEPARATOR . 'testfile.txt';
 
         touch($this->_oldFile);
     }
@@ -245,18 +245,18 @@ public function testCannotOverwriteExistingFile()
      */
     public function testGetRandomizedFile()
     {
-        $fileNoExt = $this->_filesPath . '/newfile';
+        $fileNoExt = $this->_filesPath . DIRECTORY_SEPARATOR . 'newfile';
         $filter = new RenameUploadMock(array(
             'target'          => $this->_newFile,
             'randomize'       => true,
         ));
 
-        $this->assertRegExp('#' . $fileNoExt . '_.{13}\.xml#', $filter($this->_oldFile));
+        $this->assertRegExp('#' . str_replace('\\', '\\\\', $fileNoExt) . '_.{13}\.xml#', $filter($this->_oldFile));
     }
 
     public function testGetFileWithOriginalExtension()
     {
-        $fileNoExt = $this->_filesPath . '/newfile';
+        $fileNoExt = $this->_filesPath . DIRECTORY_SEPARATOR . 'newfile';
         $filter = new RenameUploadMock(array(
             'target'          => $this->_newFile,
             'use_upload_extension' => true,
@@ -266,14 +266,14 @@ public function testGetFileWithOriginalExtension()
         $oldFilePathInfo = pathinfo($this->_oldFile);
 
         $this->assertRegExp(
-            '#' . $fileNoExt . '.'.$oldFilePathInfo['extension'].'#',
+            '#' . str_replace('\\', '\\\\', $fileNoExt) . '.'.$oldFilePathInfo['extension'].'#',
             $filter($this->_oldFile)
         );
     }
 
     public function testGetRandomizedFileWithOriginalExtension()
     {
-        $fileNoExt = $this->_filesPath . '/newfile';
+        $fileNoExt = $this->_filesPath . DIRECTORY_SEPARATOR . 'newfile';
         $filter = new RenameUploadMock(array(
             'target'          => $this->_newFile,
             'use_upload_extension' => true,
@@ -283,7 +283,7 @@ public function testGetRandomizedFileWithOriginalExtension()
         $oldFilePathInfo = pathinfo($this->_oldFile);
 
         $this->assertRegExp(
-            '#' . $fileNoExt . '_.{13}\.'.$oldFilePathInfo['extension'].'#',
+            '#' . str_replace('\\', '\\\\', $fileNoExt) . '_.{13}\.'.$oldFilePathInfo['extension'].'#',
             $filter($this->_oldFile)
         );
     }
@@ -293,13 +293,13 @@ public function testGetRandomizedFileWithOriginalExtension()
      */
     public function testGetRandomizedFileWithoutExtension()
     {
-        $fileNoExt = $this->_filesPath . '/newfile';
+        $fileNoExt = $this->_filesPath . DIRECTORY_SEPARATOR . 'newfile';
         $filter = new RenameUploadMock(array(
             'target'          => $fileNoExt,
             'randomize'       => true,
         ));
 
-        $this->assertRegExp('#' . $fileNoExt . '_.{13}#', $filter($this->_oldFile));
+        $this->assertRegExp('#' . str_replace('\\', '\\\\', $fileNoExt) . '_.{13}#', $filter($this->_oldFile));
     }
 
     /**