diff --git a/packages/flutter_tools/lib/src/build_runner/devfs_web.dart b/packages/flutter_tools/lib/src/build_runner/devfs_web.dart
index 57341bc9864..ee4f64cee98 100644
--- a/packages/flutter_tools/lib/src/build_runner/devfs_web.dart
+++ b/packages/flutter_tools/lib/src/build_runner/devfs_web.dart
@@ -10,12 +10,7 @@ import 'package:dwds/dwds.dart';
 import 'package:logging/logging.dart';
 import 'package:meta/meta.dart';
 import 'package:mime/mime.dart' as mime;
-// TODO(bkonyi): remove deprecated member usage, https://github.com/flutter/flutter/issues/51951
-// ignore: deprecated_member_use
-import 'package:package_config/discovery.dart';
-// TODO(bkonyi): remove deprecated member usage, https://github.com/flutter/flutter/issues/51951
-// ignore: deprecated_member_use
-import 'package:package_config/packages.dart';
+import 'package:package_config/package_config.dart';
 import 'package:shelf/shelf.dart' as shelf;
 import 'package:shelf/shelf_io.dart' as shelf;
 
@@ -31,6 +26,7 @@ import '../bundle.dart';
 import '../cache.dart';
 import '../compile.dart';
 import '../convert.dart';
+import '../dart/package_map.dart';
 import '../devfs.dart';
 import '../globals.dart' as globals;
 import '../web/bootstrap.dart';
@@ -142,15 +138,21 @@ class WebAssetServer implements AssetReader {
     try {
       final InternetAddress address = (await InternetAddress.lookup(hostname)).first;
       final HttpServer httpServer = await HttpServer.bind(address, port);
-      // TODO(bkonyi): remove deprecated member usage, https://github.com/flutter/flutter/issues/51951
-      // ignore: deprecated_member_use
-      final Packages packages = await loadPackagesFile(
-        Uri.base.resolve('.packages'), loader: (Uri uri) => globals.fs.file(uri).readAsBytes());
+      final PackageConfig packageConfig = await loadPackageConfigUri(
+        globals.fs.file(PackageMap.globalPackagesPath).absolute.uri,
+        loader: (Uri uri) {
+          final File file = globals.fs.file(uri);
+          if (!file.existsSync()) {
+            return null;
+          }
+          return file.readAsBytes();
+        }
+      );
       final Map<String, String> digests = <String, String>{};
       final Map<String, String> modules = <String, String>{};
       final WebAssetServer server = WebAssetServer(
         httpServer,
-        packages,
+        packageConfig,
         address,
         modules,
         digests,
@@ -248,9 +250,7 @@ class WebAssetServer implements AssetReader {
   // RandomAccessFile and read on demand.
   final Map<String, Uint8List> _files = <String, Uint8List>{};
   final Map<String, Uint8List> _sourcemaps = <String, Uint8List>{};
-  // TODO(bkonyi): remove deprecated member usage, https://github.com/flutter/flutter/issues/51951
-  // ignore: deprecated_member_use
-  final Packages _packages;
+  final PackageConfig _packages;
   final InternetAddress internetAddress;
   /* late final */ Dwds dwds;
   Directory entrypointCacheDirectory;
diff --git a/packages/flutter_tools/test/general.shard/web/devfs_web_test.dart b/packages/flutter_tools/test/general.shard/web/devfs_web_test.dart
index ae4c1388343..f5a2a9d17e9 100644
--- a/packages/flutter_tools/test/general.shard/web/devfs_web_test.dart
+++ b/packages/flutter_tools/test/general.shard/web/devfs_web_test.dart
@@ -18,12 +18,7 @@ import 'package:flutter_tools/src/convert.dart';
 import 'package:flutter_tools/src/build_runner/devfs_web.dart';
 import 'package:logging/logging.dart';
 import 'package:mockito/mockito.dart';
-// TODO(bkonyi): remove deprecated member usage, https://github.com/flutter/flutter/issues/51951
-// ignore: deprecated_member_use
-import 'package:package_config/discovery.dart';
-// TODO(bkonyi): remove deprecated member usage, https://github.com/flutter/flutter/issues/51951
-// ignore: deprecated_member_use
-import 'package:package_config/packages.dart';
+import 'package:package_config/package_config.dart';
 import 'package:platform/platform.dart';
 import 'package:flutter_tools/src/globals.dart' as globals;
 import 'package:shelf/shelf.dart';
@@ -43,14 +38,12 @@ void main() {
   Testbed testbed;
   WebAssetServer webAssetServer;
   Platform linux;
-  // TODO(bkonyi): remove deprecated member usage, https://github.com/flutter/flutter/issues/51951
-  // ignore: deprecated_member_use
-  Packages packages;
+  PackageConfig packages;
   Platform windows;
   MockHttpServer mockHttpServer;
 
   setUpAll(() async {
-    packages = await loadPackagesFile(Uri.base.resolve('.packages'));
+    packages = await loadPackageConfigUri(Uri.base.resolve('.packages'));
   });
 
   setUp(() {
@@ -354,6 +347,7 @@ void main() {
   }));
 
   test('Can start web server with specified assets', () => testbed.run(() async {
+    globals.fs.file('.packages').writeAsStringSync('\n');
     final File outputFile = globals.fs.file(globals.fs.path.join('lib', 'main.dart'))
       ..createSync(recursive: true);
     outputFile.parent.childFile('a.sources').writeAsStringSync('');
@@ -442,6 +436,7 @@ void main() {
   }));
 
   test('Launches DWDS with the correct arguments', () => testbed.run(() async {
+    globals.fs.file('.packages').writeAsStringSync('\n');
     final WebAssetServer server = await WebAssetServer.start(
       'localhost',
       8123,