diff --git a/tests/framework/utils/CFileHelperTest.php b/tests/framework/utils/CFileHelperTest.php
index 00801387b..d5e07791d 100644
--- a/tests/framework/utils/CFileHelperTest.php
+++ b/tests/framework/utils/CFileHelperTest.php
@@ -2,15 +2,41 @@
 
 class CFileHelperTest extends CTestCase
 {
-	public function testGetMimeTypeByExtension()
+	/**
+	 * @var string
+	 */
+	private $runtimePath;
+
+	public function setUp()
 	{
-		// create temporary testing data files
-		$runtimePath=dirname(__FILE__).DIRECTORY_SEPARATOR.'..'.DIRECTORY_SEPARATOR.'..'.DIRECTORY_SEPARATOR.'runtime'.DIRECTORY_SEPARATOR;
-		if(!(@file_put_contents($runtimePath.'mimeTypes1.php',"<?php return array('txa'=>'application/json','txb'=>'another/mime');")))
-			$this->markTestIncomplete('Unit tests runtime directory should have writable permissions!');
-		if(!(@file_put_contents($runtimePath.'mimeTypes2.php',"<?php return array('txt'=>'text/plain','txb'=>'another/mime2');")))
+		$this->runtimePath=dirname(__FILE__).DIRECTORY_SEPARATOR.'..'.DIRECTORY_SEPARATOR.'..'.DIRECTORY_SEPARATOR.
+			'runtime'.DIRECTORY_SEPARATOR.'CFileHelperTest'.DIRECTORY_SEPARATOR;
+		if(!is_dir($this->runtimePath) && !(@mkdir($this->runtimePath)))
 			$this->markTestIncomplete('Unit tests runtime directory should have writable permissions!');
 
+		// create temporary testing data files
+		$filesData=array(
+			'mimeTypes1.php'=>"<?php return array('txa'=>'application/json','txb'=>'another/mime');",
+			'mimeTypes2.php'=>"<?php return array('txt'=>'text/plain','txb'=>'another/mime2');",
+		);
+		foreach($filesData as $fileName=>$fileData)
+			if(!(@file_put_contents($this->runtimePath.$fileName,$fileData)))
+				$this->markTestIncomplete('Unit tests runtime directory should have writable permissions!');
+	}
+
+	public function tearDown()
+	{
+		// clean up temporary testing data files
+		foreach(array('mimeTypes1.php','mimeTypes2.php') as $fileName)
+			if(is_file($this->runtimePath.$fileName))
+				@unlink($this->runtimePath.$fileName);
+
+		if(is_dir($this->runtimePath))
+			@rmdir($this->runtimePath);
+	}
+
+	public function testGetMimeTypeByExtension()
+	{
 		// run everything ten times in one test action to be sure that caching inside
 		// CFileHelper::getMimeTypeByExtension() is working the right way
 		for($i=0; $i<10; $i++)
@@ -19,13 +45,13 @@ class CFileHelperTest extends CTestCase
 			$this->assertNull(CFileHelper::getMimeTypeByExtension('test.txb'));
 			$this->assertEquals('text/plain',CFileHelper::getMimeTypeByExtension('test.txt'));
 
-			$this->assertEquals('application/json',CFileHelper::getMimeTypeByExtension('test.txa',$runtimePath.'mimeTypes1.php'));
-			$this->assertEquals('another/mime',CFileHelper::getMimeTypeByExtension('test.txb',$runtimePath.'mimeTypes1.php'));
-			$this->assertNull(CFileHelper::getMimeTypeByExtension('test.txt',$runtimePath.'mimeTypes1.php'));
+			$this->assertEquals('application/json',CFileHelper::getMimeTypeByExtension('test.txa',$this->runtimePath.'mimeTypes1.php'));
+			$this->assertEquals('another/mime',CFileHelper::getMimeTypeByExtension('test.txb',$this->runtimePath.'mimeTypes1.php'));
+			$this->assertNull(CFileHelper::getMimeTypeByExtension('test.txt',$this->runtimePath.'mimeTypes1.php'));
 
-			$this->assertNull(CFileHelper::getMimeTypeByExtension('test.txa',$runtimePath.'mimeTypes2.php'));
-			$this->assertEquals('another/mime2',CFileHelper::getMimeTypeByExtension('test.txb',$runtimePath.'mimeTypes2.php'));
-			$this->assertEquals('text/plain',CFileHelper::getMimeTypeByExtension('test.txt',$runtimePath.'mimeTypes2.php'));
+			$this->assertNull(CFileHelper::getMimeTypeByExtension('test.txa',$this->runtimePath.'mimeTypes2.php'));
+			$this->assertEquals('another/mime2',CFileHelper::getMimeTypeByExtension('test.txb',$this->runtimePath.'mimeTypes2.php'));
+			$this->assertEquals('text/plain',CFileHelper::getMimeTypeByExtension('test.txt',$this->runtimePath.'mimeTypes2.php'));
 		}
 	}
 }