diff --git a/src/Model/Fulfilment/OrderLine.php b/src/Model/Fulfilment/OrderLine.php
index f4201d9d..6d31ca4a 100644
--- a/src/Model/Fulfilment/OrderLine.php
+++ b/src/Model/Fulfilment/OrderLine.php
@@ -73,6 +73,10 @@ public function __construct(array $data = [])
         $this->product = new Product($data['product'] ?? []);
     }
 
+    public function __toString() {
+        return (string) self::class;
+    }
+
     /**
      * @return array
      */
diff --git a/src/Support/Collection.php b/src/Support/Collection.php
index 1bd85e34..27af538d 100644
--- a/src/Support/Collection.php
+++ b/src/Support/Collection.php
@@ -1732,11 +1732,15 @@ static function ($value) {
                     return Helpers::toArrayWithoutNull($value);
                 }
 
-                if ($value && method_exists((string) $value, 'toArrayWithoutNull')) {
+                if (is_int($value)) {
+                    return $value;
+                }
+
+                if ($value && method_exists($value, 'toArrayWithoutNull')) {
                     return $value->toArrayWithoutNull();
                 }
 
-                if ($value && method_exists((string) $value, 'toArray')) {
+                if ($value && method_exists($value, 'toArray')) {
                     return $value->toArray();
                 }
 
diff --git a/test/Support/CollectionTest.php b/test/Support/CollectionTest.php
index a0020b96..a3a68fe8 100644
--- a/test/Support/CollectionTest.php
+++ b/test/Support/CollectionTest.php
@@ -55,6 +55,6 @@ public static function provideToArrayWithoutNullData(): array
      */
     public function testToArrayWithoutNull(array $input, array $output): void
     {
-        self::assertSame(((new Collection($input))->toArrayWithoutNull()), $output);
+        self::assertSame($output, ((new Collection($input))->toArrayWithoutNull()));
     }
 }
diff --git a/test/Validator/AbstractValidatorTest.php b/test/Validator/AbstractValidatorTest.php
index e157807c..c94d5f1b 100644
--- a/test/Validator/AbstractValidatorTest.php
+++ b/test/Validator/AbstractValidatorTest.php
@@ -60,13 +60,11 @@ public function testValidator(array $rules): void
             (new $testValidator())
                 ->validateAll(true)
                 ->report();
+            self::fail();
         } catch (ValidationException $e) {
             self::assertSame(['Error', 'Error', 'Error'], $e->getErrors());
             $this->addToAssertionCount(1);
         }
-
-        // Make sure the catch assertion has been executed.
-        self::assertEquals(1, $this->getNumAssertions());
     }
 
     /**