diff --git a/.gitignore b/.gitignore
index 58af6fe2fc10d..01314e1a67139 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,8 +50,7 @@ wp-tests-config.php
 /src/wp-content/fonts
 /src/wp-content/languages
 /src/wp-content/mu-plugins
-/src/wp-content/plugins/*
-!/src/wp-content/plugins/hello-dolly
+/src/wp-content/plugins
 /src/wp-content/themes/*
 !/src/wp-content/themes/twentyten
 !/src/wp-content/themes/twentyeleven
diff --git a/Gruntfile.js b/Gruntfile.js
index 216dbfae64945..70fb474ab9fdc 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -28,7 +28,7 @@ module.exports = function(grunt) {
 			'wp-content/themes/index.php',
 			'wp-content/themes/twenty*/**',
 			'wp-content/plugins/index.php',
-			'wp-content/plugins/hello-dolly/**',
+			'wp-content/plugins/hello.php',
 			'wp-content/plugins/akismet/**',
 			'!wp-content/themes/twenty*/node_modules/**',
 		],
diff --git a/src/wp-admin/includes/plugin.php b/src/wp-admin/includes/plugin.php
index ee1970ea389a8..300edff42fb1f 100644
--- a/src/wp-admin/includes/plugin.php
+++ b/src/wp-admin/includes/plugin.php
@@ -153,6 +153,8 @@ function _get_plugin_data_markup_translate( $plugin_file, $plugin_data, $markup
 					load_plugin_textdomain( $textdomain, false, dirname( $plugin_file ) );
 				}
 			}
+		} elseif ( 'hello.php' === basename( $plugin_file ) ) {
+			$textdomain = 'default';
 		}
 		if ( $textdomain ) {
 			foreach ( array( 'Name', 'PluginURI', 'Description', 'Author', 'AuthorURI', 'Version' ) as $field ) {
@@ -1006,6 +1008,10 @@ function delete_plugins( $plugins, $deprecated = '' ) {
 
 		$plugin_slug = dirname( $plugin_file );
 
+		if ( 'hello.php' === $plugin_file ) {
+			$plugin_slug = 'hello-dolly';
+		}
+
 		// Remove language files, silently.
 		if ( '.' !== $plugin_slug && ! empty( $plugin_translations[ $plugin_slug ] ) ) {
 			$translations = $plugin_translations[ $plugin_slug ];
diff --git a/src/wp-admin/includes/update-core.php b/src/wp-admin/includes/update-core.php
index 138780dc5a236..2d925afa636d2 100644
--- a/src/wp-admin/includes/update-core.php
+++ b/src/wp-admin/includes/update-core.php
@@ -841,8 +841,6 @@
 	'wp-includes/js/dist/undo-manager.min.js',
 	'wp-includes/js/dist/fields.min.js',
 	'wp-includes/js/dist/fields.js',
-	// 6.9
-	'wp-content/plugins/hello.php',
 );
 
 /**
@@ -975,7 +973,6 @@
 	'themes/twentytwentythree/' => '6.1',
 	'themes/twentytwentyfour/'  => '6.4',
 	'themes/twentytwentyfive/'  => '6.7',
-	'plugins/hello-dolly/'      => '6.9',
 );
 
 /**
diff --git a/src/wp-admin/includes/upgrade.php b/src/wp-admin/includes/upgrade.php
index 551d1016b4e2b..c8235c314f431 100644
--- a/src/wp-admin/includes/upgrade.php
+++ b/src/wp-admin/includes/upgrade.php
@@ -886,10 +886,6 @@ function upgrade_all() {
 		upgrade_682();
 	}
 
-	if ( $wp_current_db_version < 60717 ) {
-		upgrade_690();
-	}
-
 	maybe_disable_link_manager();
 
 	maybe_disable_automattic_widgets();
@@ -2485,31 +2481,6 @@ function ( $url ) {
 	}
 }
 
-/**
- * Executes changes made in WordPress 6.9.0.
- *
- * @ignore
- * @since 6.9.0
- *
- * @global int $wp_current_db_version The old (current) database version.
- */
-function upgrade_690() {
-	global $wp_current_db_version;
-
-	if ( $wp_current_db_version < 60717 ) {
-		// Switch Hello Dolly from file to directory format. See #53323
-		$active_plugins = (array) get_option( 'active_plugins', array() );
-		$old_plugin     = 'hello.php';
-		$new_plugin     = 'hello-dolly/hello.php';
-		$key            = array_search( $old_plugin, $active_plugins, true );
-
-		if ( $key ) {
-			$active_plugins[ $key ] = $new_plugin;
-			update_option( 'active_plugins', $active_plugins );
-		}
-	}
-}
-
 /**
  * Executes network-level upgrade routines.
  *
diff --git a/src/wp-content/plugins/hello-dolly/hello.php b/src/wp-content/plugins/hello.php
similarity index 99%
rename from src/wp-content/plugins/hello-dolly/hello.php
rename to src/wp-content/plugins/hello.php
index f820405da93e4..e10ecb3b24e9f 100644
--- a/src/wp-content/plugins/hello-dolly/hello.php
+++ b/src/wp-content/plugins/hello.php
@@ -10,7 +10,6 @@
 Author: Matt Mullenweg
 Version: 1.7.2
 Author URI: http://ma.tt/
-Text Domain: hello-dolly
 */
 
 // Do not load directly.
diff --git a/src/wp-includes/class-wp-plugin-dependencies.php b/src/wp-includes/class-wp-plugin-dependencies.php
index ee5e999903fb7..e4dc4b0f40c0c 100644
--- a/src/wp-includes/class-wp-plugin-dependencies.php
+++ b/src/wp-includes/class-wp-plugin-dependencies.php
@@ -870,6 +870,9 @@ protected static function check_for_circular_dependencies( $dependents, $depende
 	 * @return string The plugin's slug.
 	 */
 	protected static function convert_to_slug( $plugin_file ) {
+		if ( 'hello.php' === $plugin_file ) {
+			return 'hello-dolly';
+		}
 		return str_contains( $plugin_file, '/' ) ? dirname( $plugin_file ) : str_replace( '.php', '', $plugin_file );
 	}
 }
diff --git a/tests/phpunit/data/plugins/hello-dolly/hello.php b/tests/phpunit/data/plugins/hello.php
similarity index 100%
rename from tests/phpunit/data/plugins/hello-dolly/hello.php
rename to tests/phpunit/data/plugins/hello.php
diff --git a/tests/phpunit/tests/admin/includesPlugin.php b/tests/phpunit/tests/admin/includesPlugin.php
index e1b48ab0c45f3..4d47fb7db0a81 100644
--- a/tests/phpunit/tests/admin/includesPlugin.php
+++ b/tests/phpunit/tests/admin/includesPlugin.php
@@ -22,7 +22,7 @@ public static function wpTearDownAfterClass() {
 	}
 
 	public function test_get_plugin_data() {
-		$data = get_plugin_data( DIR_TESTDATA . '/plugins/hello-dolly/hello.php' );
+		$data = get_plugin_data( DIR_TESTDATA . '/plugins/hello.php' );
 
 		$default_headers = array(
 			'Name'        => 'Hello Dolly',
@@ -374,38 +374,38 @@ public function test_passing_float_as_position_does_not_override_int() {
 	}
 
 	public function test_is_plugin_active_true() {
-		activate_plugin( 'hello-dolly/hello.php' );
-		$test = is_plugin_active( 'hello-dolly/hello.php' );
+		activate_plugin( 'hello.php' );
+		$test = is_plugin_active( 'hello.php' );
 		$this->assertTrue( $test );
 
-		deactivate_plugins( 'hello-dolly/hello.php' );
+		deactivate_plugins( 'hello.php' );
 	}
 
 	public function test_is_plugin_active_false() {
-		deactivate_plugins( 'hello-dolly/hello.php' );
-		$test = is_plugin_active( 'hello-dolly/hello.php' );
+		deactivate_plugins( 'hello.php' );
+		$test = is_plugin_active( 'hello.php' );
 		$this->assertFalse( $test );
 	}
 
 	public function test_is_plugin_inactive_true() {
-		deactivate_plugins( 'hello-dolly/hello.php' );
-		$test = is_plugin_inactive( 'hello-dolly/hello.php' );
+		deactivate_plugins( 'hello.php' );
+		$test = is_plugin_inactive( 'hello.php' );
 		$this->assertTrue( $test );
 	}
 
 	public function test_is_plugin_inactive_false() {
-		activate_plugin( 'hello-dolly/hello.php' );
-		$test = is_plugin_inactive( 'hello-dolly/hello.php' );
+		activate_plugin( 'hello.php' );
+		$test = is_plugin_inactive( 'hello.php' );
 		$this->assertFalse( $test );
 
-		deactivate_plugins( 'hello-dolly/hello.php' );
+		deactivate_plugins( 'hello.php' );
 	}
 
 	/**
 	 * @covers ::get_plugin_files
 	 */
 	public function test_get_plugin_files_single() {
-		$name = 'hello-dolly/hello.php';
+		$name = 'hello.php';
 		$this->assertSame( array( $name ), get_plugin_files( $name ) );
 	}
 
@@ -550,7 +550,7 @@ public function test_get_dropins_not_empty() {
 	 * @covers ::is_network_only_plugin
 	 */
 	public function test_is_network_only_plugin_hello() {
-		$this->assertFalse( is_network_only_plugin( 'hello-dolly/hello.php' ) );
+		$this->assertFalse( is_network_only_plugin( 'hello.php' ) );
 	}
 
 	/**
@@ -570,7 +570,7 @@ public function test_is_network_only_plugin() {
 	 * @covers ::activate_plugins
 	 */
 	public function test_activate_plugins_single_no_array() {
-		$name = 'hello-dolly/hello.php';
+		$name = 'hello.php';
 		activate_plugins( $name );
 		$this->assertTrue( is_plugin_active( $name ) );
 		deactivate_plugins( $name );
@@ -580,7 +580,7 @@ public function test_activate_plugins_single_no_array() {
 	 * @covers ::activate_plugins
 	 */
 	public function test_activate_plugins_single_array() {
-		$name = 'hello-dolly/hello.php';
+		$name = 'hello.php';
 		activate_plugins( array( $name ) );
 		$this->assertTrue( is_plugin_active( $name ) );
 		deactivate_plugins( $name );
diff --git a/tests/phpunit/tests/admin/plugin-dependencies/hasDependents.php b/tests/phpunit/tests/admin/plugin-dependencies/hasDependents.php
index 9b900ebcae44b..43093537ba992 100644
--- a/tests/phpunit/tests/admin/plugin-dependencies/hasDependents.php
+++ b/tests/phpunit/tests/admin/plugin-dependencies/hasDependents.php
@@ -53,6 +53,6 @@ public function test_should_return_false_when_a_plugin_has_no_dependents() {
 	 */
 	public function test_should_convert_hellophp_to_hello_dolly() {
 		$this->set_property_value( 'dependency_slugs', array( 'hello-dolly' ) );
-		$this->assertTrue( self::$instance::has_dependents( 'hello-dolly/hello.php' ) );
+		$this->assertTrue( self::$instance::has_dependents( 'hello.php' ) );
 	}
 }
diff --git a/tests/phpunit/tests/admin/plugin-dependencies/initialize.php b/tests/phpunit/tests/admin/plugin-dependencies/initialize.php
index e83d4d59242ac..375e30c4bd6e2 100644
--- a/tests/phpunit/tests/admin/plugin-dependencies/initialize.php
+++ b/tests/phpunit/tests/admin/plugin-dependencies/initialize.php
@@ -281,7 +281,11 @@ public function test_should_slugify_dependent_files() {
 		$expected_slugs = array();
 		foreach ( $plugins as $plugin_file => &$headers ) {
 			// Create the expected slugs.
-			$slug = str_replace( '.php', '', explode( '/', $plugin_file )[0] );
+			if ( 'hello.php' === $plugin_file ) {
+				$slug = 'hello-dolly';
+			} else {
+				$slug = str_replace( '.php', '', explode( '/', $plugin_file )[0] );
+			}
 
 			$expected_slugs[ $plugin_file ] = $slug;
 
diff --git a/tests/phpunit/tests/ajax/wpAjaxUpdatePlugin.php b/tests/phpunit/tests/ajax/wpAjaxUpdatePlugin.php
index 794f7215b72d1..08d65879ee0cb 100644
--- a/tests/phpunit/tests/ajax/wpAjaxUpdatePlugin.php
+++ b/tests/phpunit/tests/ajax/wpAjaxUpdatePlugin.php
@@ -138,7 +138,7 @@ public function test_update_plugin() {
 		$this->_setRole( 'administrator' );
 
 		$_POST['_ajax_nonce'] = wp_create_nonce( 'updates' );
-		$_POST['plugin']      = 'hello-dolly/hello.php';
+		$_POST['plugin']      = 'hello.php';
 		$_POST['slug']        = 'hello-dolly';
 
 		// Prevent wp_update_plugins() from running.
@@ -163,7 +163,7 @@ public function test_update_plugin() {
 				'slug'         => 'hello-dolly',
 				'oldVersion'   => 'Version 1.7.2',
 				'newVersion'   => '',
-				'plugin'       => 'hello-dolly/hello.php',
+				'plugin'       => 'hello.php',
 				'pluginName'   => 'Hello Dolly',
 				'debug'        => array( 'The plugin is at the latest version.' ),
 				'errorMessage' => 'The plugin is at the latest version.',
diff --git a/tests/phpunit/tests/dependencies/scripts.php b/tests/phpunit/tests/dependencies/scripts.php
index c8059b4d4d7c5..fec0d032227c7 100644
--- a/tests/phpunit/tests/dependencies/scripts.php
+++ b/tests/phpunit/tests/dependencies/scripts.php
@@ -2994,7 +2994,7 @@ public function test_wp_set_script_translations_dependency() {
 	 * @covers ::wp_enqueue_code_editor
 	 */
 	public function test_wp_enqueue_code_editor_when_php_file_will_be_passed() {
-		$real_file              = WP_PLUGIN_DIR . '/hello-dolly/hello.php';
+		$real_file              = WP_PLUGIN_DIR . '/hello.php';
 		$wp_enqueue_code_editor = wp_enqueue_code_editor( array( 'file' => $real_file ) );
 		$this->assertNonEmptyMultidimensionalArray( $wp_enqueue_code_editor );
 
diff --git a/tests/phpunit/tests/multisite/network.php b/tests/phpunit/tests/multisite/network.php
index f82353c1a2a2d..a5741e91f93f7 100644
--- a/tests/phpunit/tests/multisite/network.php
+++ b/tests/phpunit/tests/multisite/network.php
@@ -273,7 +273,7 @@ public function test_get_blog_count_on_different_network() {
 	}
 
 	public function test_active_network_plugins() {
-		$path = 'hello-dolly/hello.php';
+		$path = 'hello.php';
 
 		// Local activate, should be invisible for the network.
 		activate_plugin( $path ); // Enable the plugin for the current site.
@@ -285,7 +285,7 @@ public function test_active_network_plugins() {
 		// Activate the plugin sitewide.
 		activate_plugin( $path, '', true ); // Enable the plugin for all sites in the network.
 		$active_plugins = wp_get_active_network_plugins();
-		$this->assertSame( array( WP_PLUGIN_DIR . '/hello-dolly/hello.php' ), $active_plugins );
+		$this->assertSame( array( WP_PLUGIN_DIR . '/hello.php' ), $active_plugins );
 
 		// Deactivate the plugin.
 		deactivate_plugins( $path );
@@ -304,7 +304,7 @@ public function test_active_network_plugins() {
 	 * @ticket 28651
 	 */
 	public function test_duplicate_network_active_plugin() {
-		$path = 'hello-dolly/hello.php';
+		$path = 'hello.php';
 		$mock = new MockAction();
 		add_action( 'activate_' . $path, array( $mock, 'action' ) );
 
@@ -324,13 +324,13 @@ public function test_duplicate_network_active_plugin() {
 	}
 
 	public function test_is_plugin_active_for_network_true() {
-		activate_plugin( 'hello-dolly/hello.php', '', true );
-		$this->assertTrue( is_plugin_active_for_network( 'hello-dolly/hello.php' ) );
+		activate_plugin( 'hello.php', '', true );
+		$this->assertTrue( is_plugin_active_for_network( 'hello.php' ) );
 	}
 
 	public function test_is_plugin_active_for_network_false() {
-		deactivate_plugins( 'hello-dolly/hello.php', false, true );
-		$this->assertFalse( is_plugin_active_for_network( 'hello-dolly/hello.php' ) );
+		deactivate_plugins( 'hello.php', false, true );
+		$this->assertFalse( is_plugin_active_for_network( 'hello.php' ) );
 	}
 
 	public function helper_deactivate_hook() {