fix tests

src/Exceptions/ExpectationException.php

@@ -1,10 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Pest\Exceptions;
 
-class ExpectationException extends \Exception
+/**
+ * @internal
+ */
+final class ExpectationException extends \Exception
 {
-    public static function invalidValue($expectationName, $valueRequired): ExpectationException
+    public static function invalidValue(string $expectationName, string $valueRequired): ExpectationException
     {
         return new ExpectationException(sprintf('%s expectation requires a %s value.', $expectationName, $valueRequired));
     }

src/Support/Container.php

@@ -45,10 +45,6 @@ final class Container
             $this->instances[$id] = $this->build($id);
         }
 
-        if (!is_object($this->instances[$id])) {
-            throw ShouldNotHappen::fromMessage('Cannot resolve a non-object from container');
-        }
-
         return $this->instances[$id];
     }