diff --git a/tests/Gitonomy/Git/Tests/AbstractTest.php b/tests/Gitonomy/Git/Tests/AbstractTest.php
index 7bdab17..d6c1d08 100644
--- a/tests/Gitonomy/Git/Tests/AbstractTest.php
+++ b/tests/Gitonomy/Git/Tests/AbstractTest.php
@@ -109,6 +109,7 @@ public static function deleteDir($dir)
         $iterator = new \RecursiveDirectoryIterator($dir, \FilesystemIterator::SKIP_DOTS | \FilesystemIterator::FOLLOW_SYMLINKS);
         $iterator = new \RecursiveIteratorIterator($iterator, \RecursiveIteratorIterator::CHILD_FIRST);
         foreach ($iterator as $file) {
+            chmod($file, 0777);
             if (is_dir($file)) {
                 rmdir($file);
             } else {
@@ -116,6 +117,7 @@ public static function deleteDir($dir)
             }
         }
 
+        chmod($dir, 0777);
         rmdir($dir);
     }
 
diff --git a/tests/Gitonomy/Git/Tests/HooksTest.php b/tests/Gitonomy/Git/Tests/HooksTest.php
index bcc8888..1f3ff5f 100644
--- a/tests/Gitonomy/Git/Tests/HooksTest.php
+++ b/tests/Gitonomy/Git/Tests/HooksTest.php
@@ -131,7 +131,7 @@ public function testSet($repository)
         $this->assertEquals('bar', file_get_contents($file), 'Hook content is correct');
 
         $perms = fileperms($file);
-        $this->assertEquals(0777, $perms & 0777, "Hook permissions are correct");
+        $this->assertEquals(defined('PHP_WINDOWS_VERSION_BUILD') ? 0666 : 0777, $perms & 0777, "Hook permissions are correct");
     }
 
     /**
diff --git a/tests/Gitonomy/Git/Tests/RepositoryTest.php b/tests/Gitonomy/Git/Tests/RepositoryTest.php
index fd1a819..8b6b827 100644
--- a/tests/Gitonomy/Git/Tests/RepositoryTest.php
+++ b/tests/Gitonomy/Git/Tests/RepositoryTest.php
@@ -34,7 +34,7 @@ public function testGetBlob_WithExisting_Works($repository)
     public function testGetSize($repository)
     {
         $size = $repository->getSize();
-        $this->assertGreaterThan(100, $size, "Repository is greater than 100KB");
+        $this->assertGreaterThan(70, $size, "Repository is greater than 70KB");
     }
 
     public function testIsBare()
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index f6dab15..74243c8 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -2,11 +2,11 @@
 require __DIR__.'/../vendor/autoload.php';
 
 if (defined('PHP_WINDOWS_VERSION_BUILD')) {
-    $server = array_change_key_case($_SERVER);
+    $server = array_change_key_case($_SERVER, true);
     $_SERVER['GIT_ENVS'] = array();
     foreach (array('PATH', 'SYSTEMROOT') as $key) {
-        if (isset($server[strtolower($key)])) {
-            $_SERVER['GIT_ENVS'][strtoupper($key)] = $server[strtolower($key)];
+        if (isset($server[$key])) {
+            $_SERVER['GIT_ENVS'][$key] = $server[$key];
         }
     }
     unset($server);