1 files changed, 1 insertions, 1 deletions
diff --git a/plugins/CoreVisualizations/tests/Unit/SparklinesConfigTest.php b/plugins/CoreVisualizations/tests/Unit/SparklinesConfigTest.php
index 27862d31e6..ff709a7fd0 100644
--- a/plugins/CoreVisualizations/tests/Unit/SparklinesConfigTest.php
+++ b/plugins/CoreVisualizations/tests/Unit/SparklinesConfigTest.php
@@ -22,7 +22,7 @@ class SparklinesConfigTest extends \PHPUnit\Framework\TestCase
      */
     private $config;
 
-    public function setUp()
+    public function setUp(): void
     {
         $this->config = new Config();
     }