diff --git a/tests/Helpers.php b/tests/Helpers.php
index f2d8f61..70c31e9 100644
--- a/tests/Helpers.php
+++ b/tests/Helpers.php
@@ -110,4 +110,10 @@ private function getProjectDirectory($dir)
     {
         return new \Dxw\Whippet\ProjectDirectory($dir);
     }
+
+    private function getDir()
+    {
+        $root = \org\bovigo\vfs\vfsStream::setup();
+        return $root->url();
+    }
 }
diff --git a/tests/dependencies/installer_test.php b/tests/dependencies/installer_test.php
index 9d84eea..222e30d 100644
--- a/tests/dependencies/installer_test.php
+++ b/tests/dependencies/installer_test.php
@@ -2,12 +2,11 @@
 
 class Dependencies_Installer_Test extends PHPUnit_Framework_TestCase
 {
-    use Helpers;
+    use \Helpers;
 
     public function testInstall()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         file_put_contents($dir.'/whippet.json', 'foobar');
         file_put_contents($dir.'/whippet.lock', 'foobar');
 
@@ -56,8 +55,7 @@ public function testInstall()
 
     public function testInstallThemeAlreadyCloned()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         file_put_contents($dir.'/whippet.json', 'foobar');
         file_put_contents($dir.'/whippet.lock', 'foobar');
 
@@ -93,8 +91,7 @@ public function testInstallThemeAlreadyCloned()
 
     public function testInstallMissingWhippetJson()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $dependencies = new \Dxw\Whippet\Dependencies\Installer(
             $this->getFactory(),
@@ -112,8 +109,7 @@ public function testInstallMissingWhippetJson()
 
     public function testInstallMissingWhippetLock()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         file_put_contents($dir.'/whippet.json', 'foobar');
 
         $this->addFactoryCallStatic('\\Dxw\\Whippet\\Files\\WhippetLock', 'fromFile', $dir.'/whippet.lock', \Result\Result::err('file not found'));
@@ -134,8 +130,7 @@ public function testInstallMissingWhippetLock()
 
     public function testInstallWrongHash()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         file_put_contents($dir.'/whippet.json', 'foobar');
         file_put_contents($dir.'/whippet.lock', 'foobar');
 
@@ -158,8 +153,7 @@ public function testInstallWrongHash()
 
     public function testInstallCloneFails()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         file_put_contents($dir.'/whippet.json', 'foobar');
         file_put_contents($dir.'/whippet.lock', 'foobar');
 
@@ -194,8 +188,7 @@ public function testInstallCloneFails()
 
     public function testInstallCheckoutFails()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         file_put_contents($dir.'/whippet.json', 'foobar');
         file_put_contents($dir.'/whippet.lock', 'foobar');
 
@@ -230,8 +223,7 @@ public function testInstallCheckoutFails()
 
     public function testInstallBlankLockfile()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         file_put_contents($dir.'/whippet.json', 'foobar');
         file_put_contents($dir.'/whippet.lock', 'foobar');
 
diff --git a/tests/dependencies/migration_test.php b/tests/dependencies/migration_test.php
index bb48ccb..bf73e2d 100644
--- a/tests/dependencies/migration_test.php
+++ b/tests/dependencies/migration_test.php
@@ -2,7 +2,7 @@
 
 class Dependencies_Migration_Test extends PHPUnit_Framework_TestCase
 {
-    use Helpers;
+    use \Helpers;
 
     private function getWhippetJsonExpectSavePath($path)
     {
@@ -19,8 +19,7 @@ private function getWhippetJsonExpectSavePath($path)
 
     public function testMigrate()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         file_put_contents($dir.'/plugins', implode("\n", [
             'source = "git@git.dxw.net:wordpress-plugins/"',
@@ -99,8 +98,7 @@ public function testMigrate()
 
     public function testMigrateDeprecatedComment()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         file_put_contents($dir.'/plugins', implode("\n", [
             '#bad comment',
@@ -126,8 +124,7 @@ public function testMigrateDeprecatedComment()
 
     public function testMigrateMissingSource()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         file_put_contents($dir.'/plugins', implode("\n", [
             'source=',
@@ -151,8 +148,7 @@ public function testMigrateMissingSource()
 
     public function testMigrateMissingPluginsFile()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $migration = new \Dxw\Whippet\Dependencies\Migration(
             $this->getFactory(),
@@ -172,8 +168,7 @@ public function testMigrateMissingPluginsFile()
 
     public function testMigratePreExistingWhippetJson()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         touch($dir.'/whippet.json');
 
         file_put_contents($dir.'/plugins', implode("\n", [
diff --git a/tests/dependencies/updater_test.php b/tests/dependencies/updater_test.php
index efaf586..d1803c1 100644
--- a/tests/dependencies/updater_test.php
+++ b/tests/dependencies/updater_test.php
@@ -2,7 +2,7 @@
 
 class Dependencies_Updater_Test extends PHPUnit_Framework_TestCase
 {
-    use Helpers;
+    use \Helpers;
 
     private function getGitignore(array $get, array $save, /* bool */ $saveIgnores, /* bool */ $warnOnGet)
     {
@@ -62,8 +62,7 @@ private function getWhippetLockWritable(array $addDependency, /* string */ $hash
 
     public function testUpdate()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $whippetJson = $this->getWhippetJson([
             'src' => [
@@ -117,8 +116,7 @@ public function testUpdate()
 
     public function testUpdateWithExistingGitignore()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         touch($dir.'/.gitignore');
 
         $whippetJson = $this->getWhippetJson([
@@ -170,8 +168,7 @@ public function testUpdateWithExistingGitignore()
 
     public function testUpdateWithExistingGitignoreNoDuplication()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         touch($dir.'/.gitignore');
 
         $whippetJson = $this->getWhippetJson([
@@ -224,8 +221,7 @@ public function testUpdateWithExistingGitignoreNoDuplication()
 
     public function testUpdateFailedGitCommand()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $whippetJson = $this->getWhippetJson([
             'src' => [
@@ -268,8 +264,7 @@ public function testUpdateFailedGitCommand()
 
     public function testUpdateWithExplicitSrc()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $whippetJson = $this->getWhippetJson([
             'src' => [
@@ -314,8 +309,7 @@ public function testUpdateWithExplicitSrc()
 
     public function testUpdateWithoutRef()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $whippetJson = $this->getWhippetJson([
             'src' => [
@@ -358,8 +352,7 @@ public function testUpdateWithoutRef()
 
     public function testUpdateBlankJsonfile()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $whippetJson = $this->getWhippetJson([]);
         $this->addFactoryCallStatic('\\Dxw\\Whippet\\Files\\WhippetJson', 'fromFile', $dir.'/whippet.json', \Result\Result::ok($whippetJson));
@@ -387,8 +380,7 @@ public function testUpdateBlankJsonfile()
 
     public function testUpdateNoGitignore()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $whippetJson = $this->getWhippetJson([
             'src' => [
@@ -442,8 +434,7 @@ public function testUpdateNoGitignore()
 
     public function testUpdateRemoveFromGitignore()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
         touch($dir.'/.gitignore');
 
         $whippetJson = $this->getWhippetJson([
@@ -499,8 +490,7 @@ public function testUpdateRemoveFromGitignore()
 
     public function testUpdateBubbleErrors()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $this->addFactoryCallStatic('\\Dxw\\Whippet\\Files\\WhippetJson', 'fromFile', $dir.'/whippet.json', \Result\Result::err('a WhippetJson error'));
 
@@ -520,8 +510,7 @@ public function testUpdateBubbleErrors()
 
     public function testUpdateNoExistingWhippetLock()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $whippetJson = $this->getWhippetJson([
             'src' => [
@@ -576,8 +565,7 @@ public function testUpdateNoExistingWhippetLock()
 
     public function testUpdateWithBrokenJson()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $whippetJson = $this->getWhippetJson([
             'src' => [
diff --git a/tests/files/whippet_json_test.php b/tests/files/whippet_json_test.php
index 45870bd..715ba65 100644
--- a/tests/files/whippet_json_test.php
+++ b/tests/files/whippet_json_test.php
@@ -2,6 +2,8 @@
 
 class Files_WhippetJson_Test extends PHPUnit_Framework_TestCase
 {
+    use \Helpers;
+
     public function testGetDependenciesPlugins()
     {
         $whippetJson = new \Dxw\Whippet\Files\WhippetJson([
diff --git a/tests/files/whippet_lock_test.php b/tests/files/whippet_lock_test.php
index 0b78f41..62180f9 100644
--- a/tests/files/whippet_lock_test.php
+++ b/tests/files/whippet_lock_test.php
@@ -2,6 +2,8 @@
 
 class Files_WhippetLock_Test extends PHPUnit_Framework_TestCase
 {
+    use \Helpers;
+
     public function testGetDependencies()
     {
         $whippetLock = new \Dxw\Whippet\Files\WhippetLock([
@@ -47,8 +49,7 @@ public function testFromStringGetDependencies()
 
     public function testFromFileGetDependencies()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         file_put_contents($dir.'/whippet.lock', json_encode([
             'themes' => [
@@ -115,8 +116,7 @@ public function testAddDependency()
 
     public function testSaveToPath()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $data = [
             'foo' => 'bar',
@@ -132,8 +132,7 @@ public function testSaveToPath()
 
     public function testSaveToPathPrettyPrinting()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $data = [
             'foo' => '/',
@@ -162,8 +161,7 @@ public function testFromStringInvalid()
 
     public function testFromFileNotFound()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         $output = \Dxw\Whippet\Files\WhippetLock::fromFile($dir.'/file-not-found.json');
 
diff --git a/tests/project_directory_test.php b/tests/project_directory_test.php
index a771274..6a52e14 100644
--- a/tests/project_directory_test.php
+++ b/tests/project_directory_test.php
@@ -2,10 +2,11 @@
 
 class ProjectDirectory_Test extends PHPUnit_Framework_TestCase
 {
+    use \Helpers;
+
     public function testGetDirectorySuccess1()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         mkdir($dir.'/wp-content/themes/my-theme');
         touch($dir.'/whippet.json');
@@ -25,8 +26,7 @@ public function testGetDirectorySuccess1()
 
     public function testGetDirectorySuccess2()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         mkdir($dir.'/projects');
         mkdir($dir.'/projects/project1');
@@ -51,8 +51,7 @@ public function testGetDirectorySuccess2()
 
     public function testGetDirectoryFailure()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         mkdir($dir.'/projects');
         mkdir($dir.'/projects/project1');
@@ -76,8 +75,7 @@ public function testGetDirectoryFailure()
 
     public function testGetDirectoryWhippetJson()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         mkdir($dir.'/wp-content/themes/my-theme');
         touch($dir.'/whippet.json');
@@ -97,8 +95,7 @@ public function testGetDirectoryWhippetJson()
 
     public function testGetDirectoryAvoidPluginsDirectory()
     {
-        $root = \org\bovigo\vfs\vfsStream::setup();
-        $dir = $root->url();
+        $dir = $this->getDir();
 
         mkdir($dir.'/wp-content');
         mkdir($dir.'/wp-content/plugins');