diff --git a/tests/Unit/Rules/IsDateOrTimeTest.php b/tests/Unit/Rules/IsDateOrTimeTest.php
index 3ce5f7a180..02f3f4915a 100644
--- a/tests/Unit/Rules/IsDateOrTimeTest.php
+++ b/tests/Unit/Rules/IsDateOrTimeTest.php
@@ -55,7 +55,7 @@ class IsDateOrTimeTest extends TestCase
         /** @var mixed $value */
         foreach ($values as $value) {
             $engine = new IsDateOrTime();
-            $this->assertFalse($engine->passes($attribute, $value), $value);
+            $this->assertFalse($engine->passes($attribute, $value), sprintf('%s', var_export($value, true)));
         }
     }