Index: tests/t3lib/tree/t3lib_tree_nodeTest.php
===================================================================
--- tests/t3lib/tree/t3lib_tree_nodeTest.php	(revision 9850)
+++ tests/t3lib/tree/t3lib_tree_nodeTest.php	(working copy)
@@ -30,10 +30,28 @@
  * @subpackage t3lib
  */
 class t3lib_tree_NodeTest extends tx_phpunit_testcase {
-	public function setUp() {
-	}
+	//////////////////////
+	// Utility functions
+	//////////////////////
+
+	/**
+	 * Returns the absolute fixtures path for this testcase.
+	 *
+	 * @return string the absolute fixtures path for this testcase, will not be empty
+	 */
+	private function determineFixturesPath() {
+		$possibleFixturesPath1 = PATH_site . 'tests/t3lib/tree/fixtures/';
+		$possibleFixturesPath2 = PATH_site . 'typo3_src/tests/t3lib/tree/fixtures/';
+
+		if (file_exists($possibleFixturesPath1)) {
+			$fixturesPath = $possibleFixturesPath1;
+		} elseif (file_exists($possibleFixturesPath2)) {
+			$fixturesPath = $possibleFixturesPath2;
+		} else {
+			$this->fail('The fixtures path could not be determined.');
+		}
 
-	public function tearDown() {
+		return $fixturesPath;
 	}
 
 	protected function setUpNodeTestData() {
@@ -67,11 +85,16 @@
 		return $fixture;
 	}
 
+
+	///////////////
+	// Test cases
+	///////////////
+
 	/**
 	 * @test
 	 */
 	public function serializeFixture() {
-		$expected = trim(file_get_contents(PATH_site . 'tests/t3lib/tree/fixtures/serialized.txt'));
+		$expected = trim(file_get_contents($this->determineFixturesPath() . 'serialized.txt'));
 		$fixture = $this->setUpNodeTestData();
 		$serializedString = trim($fixture->serialize());
 		$this->assertSame($expected, $serializedString);
@@ -81,8 +104,8 @@
 	 * @test
 	 */
 	public function deserializeFixture() {
-		$source = trim(file_get_contents(PATH_site . 'tests/t3lib/tree/fixtures/serialized.txt'));
-		$node = new t3lib_tree_Node;
+		$source = trim(file_get_contents($this->determineFixturesPath() . 'serialized.txt'));
+		$node = new t3lib_tree_Node();
 		$node->unserialize($source);
 		$serializedString = $node->serialize();
 		$this->assertSame($source, $serializedString);
@@ -105,4 +128,4 @@
 		$this->assertSame(0, $compareResult);
 	}
 }
-?>
+?>
\ No newline at end of file