Merge branch '2.x' into 3.x

src/Concerns/Pipeable.php

@@ -60,7 +60,7 @@ trait Pipeable
     }
 
     /**
-     * Get th list of pipes by the given name.
+     * Get the list of pipes by the given name.
      *
      * @return array<int, Closure>
      */

src/Concerns/Testable.php

@@ -296,7 +296,7 @@ trait Testable
             return $arguments;
         }
 
-        if (in_array($testParameterTypes[0], [Closure::class, 'callable'])) {
+        if (isset($testParameterTypes[0]) && in_array($testParameterTypes[0], [Closure::class, 'callable'])) {
             return $arguments;
         }