diff --git a/tests/UnitTests/TemplateSource/NullCoalescingTest.php b/tests/UnitTests/TemplateSource/NullCoalescingTest.php
index 2432527a7..c771ba339 100644
--- a/tests/UnitTests/TemplateSource/NullCoalescingTest.php
+++ b/tests/UnitTests/TemplateSource/NullCoalescingTest.php
@@ -4,7 +4,7 @@ class NullCoalescingTest extends PHPUnit_Smarty {
 
 	public function setUp(): void
 	{
-		$this->setUpSmarty('/tmp');
+		$this->setUpSmarty(sys_get_temp_dir());
 		$this->cleanDirs();
 	}
 
diff --git a/tests/UnitTests/TemplateSource/TernaryTest.php b/tests/UnitTests/TemplateSource/TernaryTest.php
index 95ce4b34b..312ada96e 100644
--- a/tests/UnitTests/TemplateSource/TernaryTest.php
+++ b/tests/UnitTests/TemplateSource/TernaryTest.php
@@ -4,7 +4,7 @@ class TernaryTest extends PHPUnit_Smarty {
 
 	public function setUp(): void
 	{
-		$this->setUpSmarty('/tmp');
+		$this->setUpSmarty(sys_get_temp_dir());
 		$this->cleanDirs();
 	}