diff --git a/core/lib/Drupal/Core/Database/StatementInterface.php b/core/lib/Drupal/Core/Database/StatementInterface.php
index b7328ad5910ab1aa89bf95a2d12b450095b46a9e..66c53076d50a07fc08a5c3e5d1f66c47df9e9030 100644
--- a/core/lib/Drupal/Core/Database/StatementInterface.php
+++ b/core/lib/Drupal/Core/Database/StatementInterface.php
@@ -125,7 +125,7 @@ public function fetchField($index = 0);
    *
    * @param string|null $class_name
    *   Name of the created class.
-   * @param array|null $constructor_arguments
+   * @param array $constructor_arguments
    *   Elements of this array are passed to the constructor.
    * phpcs:enable
    *
@@ -133,7 +133,7 @@ public function fetchField($index = 0);
    *   The object of specified class or \stdClass if not specified. Returns
    *   FALSE or NULL if there is no next row.
    */
-  public function fetchObject(/* string $class_name = NULL, array $constructor_arguments = NULL */);
+  public function fetchObject(/* string $class_name = NULL, array $constructor_arguments = [] */);
 
   /**
    * Fetches the next row and returns it as an associative array.
diff --git a/core/lib/Drupal/Core/Database/StatementPrefetch.php b/core/lib/Drupal/Core/Database/StatementPrefetch.php
index 7a64b49757a6b85688ecfb956348373f0840f90f..b717da2efb676de3235cdc312e56359343777f20 100644
--- a/core/lib/Drupal/Core/Database/StatementPrefetch.php
+++ b/core/lib/Drupal/Core/Database/StatementPrefetch.php
@@ -470,7 +470,7 @@ public function fetchField($index = 0) {
   /**
    * {@inheritdoc}
    */
-  public function fetchObject(string $class_name = NULL, array $constructor_arguments = NULL) {
+  public function fetchObject(string $class_name = NULL, array $constructor_arguments = []) {
     if (isset($this->currentRow)) {
       if (!isset($class_name)) {
         // Directly cast to an object to avoid a function call.
diff --git a/core/lib/Drupal/Core/Database/StatementPrefetchIterator.php b/core/lib/Drupal/Core/Database/StatementPrefetchIterator.php
index d12d41f903388992e9c733f53e1749bfe056a0e1..20a3378302f938ebcde46591159bf26bde380af8 100644
--- a/core/lib/Drupal/Core/Database/StatementPrefetchIterator.php
+++ b/core/lib/Drupal/Core/Database/StatementPrefetchIterator.php
@@ -282,7 +282,7 @@ public function fetchField($index = 0) {
   /**
    * {@inheritdoc}
    */
-  public function fetchObject(string $class_name = NULL, array $constructor_arguments = NULL) {
+  public function fetchObject(string $class_name = NULL, array $constructor_arguments = []) {
     if (!isset($class_name)) {
       return $this->fetch(\PDO::FETCH_OBJ);
     }
diff --git a/core/lib/Drupal/Core/Database/StatementWrapper.php b/core/lib/Drupal/Core/Database/StatementWrapper.php
index d8e7b1c39883dc9308a49fc8d383cce56d3df6b1..965e68fce359840420a21d35d5caec225d2f7c6f 100644
--- a/core/lib/Drupal/Core/Database/StatementWrapper.php
+++ b/core/lib/Drupal/Core/Database/StatementWrapper.php
@@ -193,7 +193,7 @@ public function fetchAssoc() {
   /**
    * {@inheritdoc}
    */
-  public function fetchObject(string $class_name = NULL, array $constructor_arguments = NULL) {
+  public function fetchObject(string $class_name = NULL, array $constructor_arguments = []) {
     if ($class_name) {
       return $this->clientStatement->fetchObject($class_name, $constructor_arguments);
     }
diff --git a/core/lib/Drupal/Core/Database/StatementWrapperIterator.php b/core/lib/Drupal/Core/Database/StatementWrapperIterator.php
index 59738a2fab7f53caf0cefc88fb4d252c0f10c382..b0474045a3752f096702499f9f7a29a3e1e59379 100644
--- a/core/lib/Drupal/Core/Database/StatementWrapperIterator.php
+++ b/core/lib/Drupal/Core/Database/StatementWrapperIterator.php
@@ -215,7 +215,7 @@ public function fetchAssoc() {
   /**
    * {@inheritdoc}
    */
-  public function fetchObject(string $class_name = NULL, array $constructor_arguments = NULL) {
+  public function fetchObject(string $class_name = NULL, array $constructor_arguments = []) {
     if ($class_name) {
       $row = $this->clientStatement->fetchObject($class_name, $constructor_arguments);
     }
diff --git a/core/tests/Drupal/KernelTests/Core/Database/FetchTest.php b/core/tests/Drupal/KernelTests/Core/Database/FetchTest.php
index 73dc244bc39df6021bb2d8e9c60c655e0d053c31..e4bc165355dc2d1a2039a4c50e16e8d2ebc6fda6 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/FetchTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/FetchTest.php
@@ -97,6 +97,24 @@ public function testQueryFetchObjectClass() {
     $this->assertSame(1, $records, 'There is only one record.');
   }
 
+  /**
+   * Confirms that we can fetch a record into a class without constructor args.
+   *
+   * @see \Drupal\Tests\system\Functional\Database\FakeRecord
+   * @see \Drupal\Core\Database\StatementPrefetch::fetchObject
+   */
+  public function testQueryFetchObjectClassNoConstructorArgs(): void {
+    $records = 0;
+    $query = $this->connection->query('SELECT [name] FROM {test} WHERE [age] = :age', [':age' => 25]);
+    while ($result = $query->fetchObject(FakeRecord::class)) {
+      $records += 1;
+      $this->assertInstanceOf(FakeRecord::class, $result);
+      $this->assertSame('John', $result->name);
+      $this->assertSame(0, $result->fakeArg);
+    }
+    $this->assertSame(1, $records);
+  }
+
   /**
    * Confirms that we can fetch a record into a new instance of a custom class.
    *