diff -u b/core/modules/file/file.module b/core/modules/file/file.module
--- b/core/modules/file/file.module
+++ b/core/modules/file/file.module
@@ -170,9 +170,6 @@
 
   try {
     $uri = $file_system->copy($source->getFileUri(), $destination, $replace);
-    $file = $source->createDuplicate();
-    $file->setFileUri($uri);
-    $file->setFilename($file_system->basename($uri));
     // If we are replacing an existing file, load it.
     if ($replace == FileSystemInterface::EXISTS_REPLACE && $existing_files = entity_load_multiple_by_properties('file', ['uri' => $uri])) {
       $file = reset($existing_files);
@@ -186,7 +183,7 @@
         $file->setFilename($file_system->basename($destination));
       }
       else {
-        $file->setFilename(drupal_basename($uri));
+        $file->setFilename(\Drupal::service('file_system')->basename($uri));
       }
     }
 
diff -u b/core/modules/file/tests/src/Kernel/SaveDataTest.php b/core/modules/file/tests/src/Kernel/SaveDataTest.php
--- b/core/modules/file/tests/src/Kernel/SaveDataTest.php
+++ b/core/modules/file/tests/src/Kernel/SaveDataTest.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\Tests\file\Kernel;
 
+use Drupal\Core\File\FileSystemInterface;
 use Drupal\file\Entity\File;
 
 /**
@@ -88,4 +89,29 @@
 
   /**
+   * Test file_save_data() when replacing an non-existing file.
+   */
+  public function testNonExistingReplace() {
+    $contents = $this->randomMachineName(8);
+
+    \Drupal::state()->set('file_test.hook_entity_create', FALSE);
+    $result = file_save_data($contents, NULL, FileSystemInterface::EXISTS_REPLACE);
+    $this->assertTrue($result, 'File saved successfully.');
+
+    $entity_create_hook_fired = \Drupal::state()->get('file_test.hook_entity_create');
+    $this->assertTrue($entity_create_hook_fired, 'Entity create hook was invoked for a file replace operation.');
+
+    $this->assertSame('public', file_uri_scheme($result->getFileUri()), "File was placed in Drupal's files directory.");
+    $this->assertSame($contents, file_get_contents($result->getFileUri()), 'Contents of the file are correct.');
+    $this->assertSame($result->getMimeType(), 'application/octet-stream', 'A MIME type was set.');
+    $this->assertTrue($result->isPermanent(), "The file's status was set to permanent.");
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(['insert']);
+
+    // Verify that what was returned is what's in the database.
+    $this->assertFileUnchanged($result, File::load($result->id()));
+  }
+
+  /**
    * Test file_save_data() when replacing an existing file.
    */