diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8fabf94fe..47592e529 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -39,11 +39,6 @@ jobs:
           cache: true
           flutter-version: ${{ matrix.sdk == 'min' && '2.8.0' || '' }}
           channel: ${{ matrix.sdk == 'min' && '' || matrix.channel }}
-      - run: |
-          chmod +x ./scripts/prepare_pinning_certs.sh
-          ./scripts/prepare_pinning_certs.sh
-      - name: Install proxy for tests
-        run: sudo apt-get update && sudo apt-get install -y squid
       - run: dart pub get
       - uses: bluefireteam/melos-action@v3
         with:
@@ -63,6 +58,28 @@ jobs:
       - name: '[Verify step] Publish dry-run'
         if: ${{ matrix.sdk == 'stable' }}
         run: melos run publish-dry-run
+      # Tests
+      - run: ./scripts/prepare_pinning_certs.sh
+      - name: Install proxy for tests
+        run: sudo apt-get update && sudo apt-get install -y squid mkcert
+      - name: Start local httpbun
+        run: |
+          mkcert -install
+          mkcert -cert-file '/tmp/cert.pem' -key-file '/tmp/key.pem' httpbun.local
+          echo '127.0.0.1 httpbun.local' | sudo tee --append /etc/hosts
+          docker run \
+            --name httpbun \
+            --detach \
+            --publish 443:443 \
+            --volume /tmp:/tmp:ro \
+            --env HTTPBUN_TLS_CERT=/tmp/cert.pem \
+            --env HTTPBUN_TLS_KEY=/tmp/key.pem \
+            --pull always \
+            sharat87/httpbun
+          sleep 1
+          curl --fail --silent --show-error https://httpbun.local/any
+      - name: Use local httpbun in tests
+        run: melos run httpbun:local
       - name: '[Verify step] Test Dart packages [VM]'
         run: melos run test:vm
       - name: '[Verify step] Test Dart packages [Chrome]'
@@ -71,6 +88,7 @@ jobs:
         run: melos run test:web:firefox
       - name: '[Verify step] Test Flutter packages'
         run: melos run test:flutter
+      # Coverage
       - name: '[Coverage] Format & print test coverage'
         if: ${{ matrix.sdk == 'stable' }}
         run: melos run coverage:show
diff --git a/dio/test/download_test.dart b/dio/test/download_test.dart
index b8fe20f7f..85025b696 100644
--- a/dio/test/download_test.dart
+++ b/dio/test/download_test.dart
@@ -178,7 +178,7 @@ void main() {
     expect(f.existsSync(), isTrue);
 
     final cancelToken = CancelToken();
-    final dio = Dio()..options.baseUrl = 'https://httpbun.com';
+    final dio = Dio()..options.baseUrl = httpbunBaseUrl;
 
     await expectLater(
       dio.download(
diff --git a/dio/test/test_suite_test.dart b/dio/test/test_suite_test.dart
index 750dbb552..1b341d3ca 100644
--- a/dio/test/test_suite_test.dart
+++ b/dio/test/test_suite_test.dart
@@ -3,6 +3,6 @@ import 'package:dio_test/tests.dart';
 
 void main() {
   dioAdapterTestSuite(
-    () => Dio(BaseOptions(baseUrl: 'https://httpbun.com/')),
+    (baseUrl) => Dio(BaseOptions(baseUrl: baseUrl)),
   );
 }
diff --git a/dio/test/timeout_test.dart b/dio/test/timeout_test.dart
index ed4747179..ddc243b28 100644
--- a/dio/test/timeout_test.dart
+++ b/dio/test/timeout_test.dart
@@ -10,7 +10,7 @@ void main() {
 
   setUp(() {
     dio = Dio();
-    dio.options.baseUrl = 'https://httpbun.com/';
+    dio.options.baseUrl = httpbunBaseUrl;
   });
 
   group('Timeout exception of', () {
diff --git a/dio/test/upload_test.dart b/dio/test/upload_test.dart
index 33ddfd183..b4055ccb0 100644
--- a/dio/test/upload_test.dart
+++ b/dio/test/upload_test.dart
@@ -4,13 +4,14 @@ import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:dio/dio.dart';
+import 'package:dio_test/util.dart';
 import 'package:test/test.dart';
 
 void main() {
   late Dio dio;
 
   setUp(() {
-    dio = Dio()..options.baseUrl = 'https://httpbun.com/';
+    dio = Dio()..options.baseUrl = httpbunBaseUrl;
   });
 
   test('Uint8List should not be transformed', () async {
diff --git a/dio_test/dart_test.yaml b/dio_test/dart_test.yaml
deleted file mode 100644
index 52cfb59fa..000000000
--- a/dio_test/dart_test.yaml
+++ /dev/null
@@ -1,18 +0,0 @@
-file_reporters:
-  json: build/reports/test-results.json
-
-tags:
-  tls:
-    skip: "Skipping TLS test with specific setup requirements by default. Use '-P all' to run all tests."
-    presets:
-      all:
-        skip: false
-
-override_platforms:
-  chrome:
-    settings:
-      headless: true
-  firefox:
-    settings:
-      # headless argument has to be set explicitly for non-chrome browsers
-      arguments: --headless
diff --git a/dio_test/lib/src/httpbun.dart b/dio_test/lib/src/httpbun.dart
new file mode 100644
index 000000000..b2e435942
--- /dev/null
+++ b/dio_test/lib/src/httpbun.dart
@@ -0,0 +1 @@
+const httpbunBaseUrl = 'https://httpbun.com';
diff --git a/dio_test/lib/src/test/cors_tests.dart b/dio_test/lib/src/test/cors_tests.dart
index e2da90672..a726a1e1c 100644
--- a/dio_test/lib/src/test/cors_tests.dart
+++ b/dio_test/lib/src/test/cors_tests.dart
@@ -6,12 +6,12 @@ import 'package:test/test.dart';
 /// either "simple" or "preflighted". Reference:
 /// https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests
 void corsTests(
-  Dio Function() create,
+  Dio Function(String baseUrl) create,
 ) {
   late Dio dio;
 
   setUp(() {
-    dio = create();
+    dio = create(httpbunBaseUrl);
   });
 
   group('CORS preflight', () {
diff --git a/dio_test/lib/src/test/download_stream_tests.dart b/dio_test/lib/src/test/download_stream_tests.dart
index 92a03eada..dce5940ad 100644
--- a/dio_test/lib/src/test/download_stream_tests.dart
+++ b/dio_test/lib/src/test/download_stream_tests.dart
@@ -2,20 +2,19 @@ import 'dart:async';
 import 'dart:io';
 
 import 'package:dio/dio.dart';
+import 'package:dio_test/util.dart';
 import 'package:path/path.dart' as p;
 import 'package:test/test.dart';
 
-import '../../util.dart';
-
 void downloadStreamTests(
-  Dio Function() create,
+  Dio Function(String baseUrl) create,
 ) {
   group('download', () {
     late Dio dio;
     late Directory tmp;
 
     setUp(() {
-      dio = create();
+      dio = create(httpbunBaseUrl);
     });
 
     setUpAll(() {
@@ -24,6 +23,7 @@ void downloadStreamTests(
         tmp.deleteSync(recursive: true);
       });
     });
+
     test('bytes', () async {
       final path = p.join(tmp.path, 'bytes.txt');
 
@@ -103,7 +103,7 @@ void downloadStreamTests(
     test('cancels streamed response mid request', () async {
       final cancelToken = CancelToken();
       final response = await dio.get(
-        'bytes/${1024 * 1024 * 100}',
+        '/bytes/${1024 * 1024 * 100}',
         options: Options(responseType: ResponseType.stream),
         cancelToken: cancelToken,
         onReceiveProgress: (c, t) {
@@ -128,7 +128,7 @@ void downloadStreamTests(
 
       await expectLater(
         dio.download(
-          'bytes/${1024 * 1024 * 10}',
+          '/bytes/${1024 * 1024 * 10}',
           path,
           cancelToken: cancelToken,
           onReceiveProgress: (c, t) {
diff --git a/dio_test/lib/src/test/headers_tests.dart b/dio_test/lib/src/test/headers_tests.dart
index 8724dddae..8cb91a8a8 100644
--- a/dio_test/lib/src/test/headers_tests.dart
+++ b/dio_test/lib/src/test/headers_tests.dart
@@ -1,13 +1,14 @@
 import 'package:dio/dio.dart';
+import 'package:dio_test/util.dart';
 import 'package:test/test.dart';
 
 void headerTests(
-  Dio Function() create,
+  Dio Function(String baseUrl) create,
 ) {
   late Dio dio;
 
-  setUpAll(() {
-    dio = create();
+  setUp(() {
+    dio = create(httpbunBaseUrl);
   });
 
   group('headers', () {
diff --git a/dio_test/lib/src/test/http_method_tests.dart b/dio_test/lib/src/test/http_method_tests.dart
index 2240f6503..415ad6f31 100644
--- a/dio_test/lib/src/test/http_method_tests.dart
+++ b/dio_test/lib/src/test/http_method_tests.dart
@@ -1,14 +1,16 @@
 import 'package:dio/dio.dart';
+import 'package:dio_test/util.dart';
 import 'package:test/test.dart';
 
 void httpMethodTests(
-  Dio Function() create,
+  Dio Function(String baseUrl) create,
 ) {
   const data = {'content': 'I am payload'};
 
   late Dio dio;
-  setUpAll(() {
-    dio = create();
+
+  setUp(() {
+    dio = create(httpbunBaseUrl);
   });
 
   group('HTTP method', () {
diff --git a/dio_test/lib/src/test/parameter_tests.dart b/dio_test/lib/src/test/parameter_tests.dart
index 284956ffd..5eca0ad76 100644
--- a/dio_test/lib/src/test/parameter_tests.dart
+++ b/dio_test/lib/src/test/parameter_tests.dart
@@ -1,13 +1,14 @@
 import 'package:dio/dio.dart';
+import 'package:dio_test/util.dart';
 import 'package:test/test.dart';
 
 void parameterTests(
-  Dio Function() create,
+  Dio Function(String baseUrl) create,
 ) {
   late Dio dio;
 
-  setUpAll(() {
-    dio = create();
+  setUp(() {
+    dio = create(httpbunBaseUrl);
   });
 
   group('parameters', () {
diff --git a/dio_test/lib/src/test/redirect_tests.dart b/dio_test/lib/src/test/redirect_tests.dart
index 6693a351a..6223cf9de 100644
--- a/dio_test/lib/src/test/redirect_tests.dart
+++ b/dio_test/lib/src/test/redirect_tests.dart
@@ -1,22 +1,21 @@
 import 'package:dio/dio.dart';
+import 'package:dio_test/util.dart';
 import 'package:test/test.dart';
 
-import '../utils.dart';
-
 void redirectTests(
-  Dio Function() create,
+  Dio Function(String baseUrl) create,
 ) {
   late Dio dio;
 
-  setUpAll(() {
-    dio = create();
+  setUp(() {
+    dio = create(httpbunBaseUrl);
   });
 
   group('redirects', () {
     test('single', () async {
       final response = await dio.get(
         '/redirect',
-        queryParameters: {'url': 'https://httpbun.com/get'},
+        queryParameters: {'url': '$httpbunBaseUrl/get'},
         onReceiveProgress: (received, total) {
           // ignore progress
         },
diff --git a/dio_test/lib/src/test/status_code_tests.dart b/dio_test/lib/src/test/status_code_tests.dart
index 391313b51..7b5aa743b 100644
--- a/dio_test/lib/src/test/status_code_tests.dart
+++ b/dio_test/lib/src/test/status_code_tests.dart
@@ -1,16 +1,14 @@
 import 'package:dio/dio.dart';
-import 'package:dio_test/src/utils.dart';
+import 'package:dio_test/util.dart';
 import 'package:test/test.dart';
 
-import '../matcher.dart';
-
 void statusCodeTests(
-  Dio Function() create,
+  Dio Function(String baseUrl) create,
 ) {
   late Dio dio;
 
-  setUpAll(() {
-    dio = create();
+  setUp(() {
+    dio = create(httpbunBaseUrl);
   });
 
   group('status code', () {
diff --git a/dio_test/lib/src/test/suite.dart b/dio_test/lib/src/test/suite.dart
index 4abc37f8f..5fad692b9 100644
--- a/dio_test/lib/src/test/suite.dart
+++ b/dio_test/lib/src/test/suite.dart
@@ -2,7 +2,7 @@ import 'package:dio/dio.dart';
 import 'package:dio_test/tests.dart';
 
 typedef TestSuiteFunction = void Function(
-  Dio Function() create,
+  Dio Function(String baseUrl) create,
 );
 
 const _tests = [
@@ -17,7 +17,7 @@ const _tests = [
 ];
 
 void dioAdapterTestSuite(
-  Dio Function() create, {
+  Dio Function(String baseUrl) create, {
   List<TestSuiteFunction> tests = _tests,
 }) =>
     tests.forEach((test) => test(create));
diff --git a/dio_test/lib/src/test/timeout_tests.dart b/dio_test/lib/src/test/timeout_tests.dart
index 7bdd86166..23fbbdc5b 100644
--- a/dio_test/lib/src/test/timeout_tests.dart
+++ b/dio_test/lib/src/test/timeout_tests.dart
@@ -1,18 +1,16 @@
 import 'dart:async';
 
 import 'package:dio/dio.dart';
-import 'package:dio_test/src/matcher.dart';
+import 'package:dio_test/util.dart';
 import 'package:test/test.dart';
 
-import '../utils.dart';
-
 void timeoutTests(
-  Dio Function() create,
+  Dio Function(String baseUrl) create,
 ) {
   late Dio dio;
 
   setUp(() {
-    dio = create();
+    dio = create(httpbunBaseUrl);
   });
 
   group('Timeout exception of', () {
@@ -80,30 +78,26 @@ void timeoutTests(
   });
 
   test('ignores zero duration timeouts', () async {
-    final dio = Dio(
-      BaseOptions(
-        baseUrl: 'https://httpbun.com/',
-        connectTimeout: Duration.zero,
-        receiveTimeout: Duration.zero,
-      ),
-    );
+    dio.options
+      ..connectTimeout = Duration.zero
+      ..receiveTimeout = Duration.zero;
     // Ignores zero duration timeouts from the base options.
     await dio.get('/drip-lines?delay=1');
     // Reset the base options.
-    dio.options.receiveTimeout = Duration(milliseconds: 10);
+    dio.options.receiveTimeout = Duration(milliseconds: 1);
     await expectLater(
       dio.get('/drip-lines?delay=1'),
       throwsDioException(
         DioExceptionType.receiveTimeout,
-        messageContains: '0:00:00.010000',
+        messageContains: dio.options.receiveTimeout.toString(),
       ),
     );
-    dio.options.connectTimeout = Duration(milliseconds: 10);
+    dio.options.connectTimeout = Duration(milliseconds: 1);
     await expectLater(
       dio.get(nonRoutableUrl),
       throwsDioException(
         DioExceptionType.connectionTimeout,
-        messageContains: '0:00:00.010000',
+        messageContains: dio.options.connectTimeout.toString(),
       ),
     );
     dio.options.connectTimeout = Duration.zero;
diff --git a/dio_test/lib/util.dart b/dio_test/lib/util.dart
index d1e442026..f182df099 100644
--- a/dio_test/lib/util.dart
+++ b/dio_test/lib/util.dart
@@ -1,2 +1,3 @@
+export 'src/httpbun.dart';
 export 'src/matcher.dart';
 export 'src/utils.dart';
diff --git a/melos.yaml b/melos.yaml
index da6a60073..4148ef614 100644
--- a/melos.yaml
+++ b/melos.yaml
@@ -41,6 +41,12 @@ scripts:
     exec: dart pub publish --dry-run
     packageFilters:
       noPrivate: true
+  httpbun:local:
+    description: Run httpbun locally
+    run: echo "const httpbunBaseUrl = 'https://httpbun.local';" > dio_test/lib/src/httpbun.dart
+  httpbun:com:
+    description: Run httpbun locally
+    run: echo "const httpbunBaseUrl = 'https://httpbun.com';" > dio_test/lib/src/httpbun.dart
   test:
     name: All tests
     run: |
diff --git a/plugins/http2_adapter/test/http2_test.dart b/plugins/http2_adapter/test/http2_test.dart
index a936f962e..004916fdf 100644
--- a/plugins/http2_adapter/test/http2_test.dart
+++ b/plugins/http2_adapter/test/http2_test.dart
@@ -1,11 +1,12 @@
 import 'package:dio/dio.dart';
 import 'package:dio_http2_adapter/dio_http2_adapter.dart';
+import 'package:dio_test/util.dart';
 import 'package:test/test.dart';
 
 void main() {
   test('works with non-TLS requests', () async {
     final dio = Dio()..httpClientAdapter = Http2Adapter(ConnectionManager());
-    await dio.get('http://flutter.cn/');
+    await dio.get('https://flutter.cn/');
     await dio.get('https://flutter.cn/non-exist-destination');
   });
 
@@ -56,7 +57,7 @@ void main() {
 
   test('adds one to input values', () async {
     final dio = Dio()
-      ..options.baseUrl = 'https://httpbun.com/'
+      ..options.baseUrl = httpbunBaseUrl
       ..httpClientAdapter = Http2Adapter(
         ConnectionManager(
           idleTimeout: Duration(milliseconds: 10),
@@ -65,10 +66,10 @@ void main() {
       );
 
     Response<String> response;
-    response = await dio.get('get');
+    response = await dio.get('/get');
     assert(response.statusCode == 200);
     response = await dio.get(
-      'nkjnjknjn.html',
+      '/nkjnjknjn.html',
       options: Options(validateStatus: (status) => true),
     );
     assert(response.statusCode == 404);
@@ -76,14 +77,14 @@ void main() {
 
   test('request with payload', () async {
     final dio = Dio()
-      ..options.baseUrl = 'https://httpbun.com/'
+      ..options.baseUrl = httpbunBaseUrl
       ..httpClientAdapter = Http2Adapter(
         ConnectionManager(
           idleTimeout: Duration(milliseconds: 10),
         ),
       );
 
-    final res = await dio.post('post', data: 'TEST');
+    final res = await dio.post('/post', data: 'TEST');
     expect(res.data.toString(), contains('TEST'));
   });
 
@@ -91,14 +92,14 @@ void main() {
     'request with payload via proxy',
     () async {
       final dio = Dio()
-        ..options.baseUrl = 'https://httpbun.com/'
+        ..options.baseUrl = httpbunBaseUrl
         ..httpClientAdapter = Http2Adapter(ConnectionManager(
           idleTimeout: Duration(milliseconds: 10),
           onClientCreate: (uri, settings) =>
               settings.proxy = Uri.parse('http://localhost:3128'),
         ));
 
-      final res = await dio.post('post', data: 'TEST');
+      final res = await dio.post('/post', data: 'TEST');
       expect(res.data.toString(), contains('TEST'));
     },
     tags: ['proxy'],
@@ -107,7 +108,7 @@ void main() {
   test('request without network and restore', () async {
     bool needProxy = true;
     final dio = Dio()
-      ..options.baseUrl = 'https://httpbun.com/'
+      ..options.baseUrl = httpbunBaseUrl
       ..httpClientAdapter = Http2Adapter(ConnectionManager(
         idleTimeout: Duration(milliseconds: 10),
         onClientCreate: (uri, settings) {
@@ -123,18 +124,18 @@ void main() {
       ));
     try {
       // will throw SocketException
-      await dio.post('post', data: 'TEST');
+      await dio.post('/post', data: 'TEST');
     } on DioException {
       // ignore
     }
-    final res = await dio.post('post', data: 'TEST');
+    final res = await dio.post('/post', data: 'TEST');
     expect(res.data.toString(), contains('TEST'));
   });
 
   test('catch DioException when receiveTimeout', () {
     final dio = Dio(
       BaseOptions(
-        baseUrl: 'https://httpbun.com/',
+        baseUrl: httpbunBaseUrl,
         receiveTimeout: Duration(seconds: 5),
       ),
     );
@@ -159,7 +160,7 @@ void main() {
   test('no DioException when receiveTimeout > request duration', () async {
     final dio = Dio(
       BaseOptions(
-        baseUrl: 'https://httpbun.com/',
+        baseUrl: httpbunBaseUrl,
         receiveTimeout: Duration(seconds: 5),
       ),
     );
@@ -174,13 +175,13 @@ void main() {
 
   group('redirects', () {
     final dio = Dio()
-      ..options.baseUrl = 'https://httpbun.com/'
+      ..options.baseUrl = httpbunBaseUrl
       ..httpClientAdapter = Http2Adapter(ConnectionManager());
 
     test('single', () async {
       final response = await dio.get(
         '/redirect',
-        queryParameters: {'url': 'https://httpbun.com/get'},
+        queryParameters: {'url': '$httpbunBaseUrl/get'},
       );
       expect(response.isRedirect, isTrue);
       expect(response.redirects.length, 1);
@@ -221,18 +222,18 @@ void main() {
     });
 
     test('request with redirect', () async {
-      final res = await dio.get('absolute-redirect/2');
+      final res = await dio.get('/absolute-redirect/2');
       expect(res.statusCode, 200);
     });
   });
 
   test('header value types implicit support', () async {
     final dio = Dio()
-      ..options.baseUrl = 'https://httpbun.com/'
+      ..options.baseUrl = httpbunBaseUrl
       ..httpClientAdapter = Http2Adapter(ConnectionManager());
 
     final res = await dio.post(
-      'post',
+      '/post',
       data: 'TEST',
       options: Options(
         headers: {
diff --git a/plugins/http2_adapter/test/test_suite_test.dart b/plugins/http2_adapter/test/test_suite_test.dart
index fe6f76d2e..5c7e907ae 100644
--- a/plugins/http2_adapter/test/test_suite_test.dart
+++ b/plugins/http2_adapter/test/test_suite_test.dart
@@ -4,7 +4,7 @@ import 'package:dio_test/tests.dart';
 
 void main() {
   dioAdapterTestSuite(
-    () => Dio(BaseOptions(baseUrl: 'https://httpbun.com/'))
+    (baseUrl) => Dio(BaseOptions(baseUrl: baseUrl))
       ..httpClientAdapter = Http2Adapter(ConnectionManager()),
   );
 }
diff --git a/scripts/prepare_pinning_certs.sh b/scripts/prepare_pinning_certs.sh
old mode 100644
new mode 100755