diff --git a/packages/url_launcher/url_launcher/CHANGELOG.md b/packages/url_launcher/url_launcher/CHANGELOG.md
index 0cab10180cd8..3097a2122ae1 100644
--- a/packages/url_launcher/url_launcher/CHANGELOG.md
+++ b/packages/url_launcher/url_launcher/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 5.4.3
+
+* Fixed the launchUniversalLinkIos method.
+
 ## 5.4.2
 
 * Make the pedantic dev_dependency explicit.
diff --git a/packages/url_launcher/url_launcher/example/lib/main.dart b/packages/url_launcher/url_launcher/example/lib/main.dart
index 00ab6c5b047d..f7d90c4bef65 100644
--- a/packages/url_launcher/url_launcher/example/lib/main.dart
+++ b/packages/url_launcher/url_launcher/example/lib/main.dart
@@ -91,15 +91,15 @@ class _MyHomePageState extends State<MyHomePage> {
   }
 
   Future<void> _launchUniversalLinkIos(String url) async {
-    if (await canLaunch('https://youtube.com')) {
+    if (await canLaunch(url)) {
       final bool nativeAppLaunchSucceeded = await launch(
-        'https://youtube.com',
+        url,
         forceSafariVC: false,
         universalLinksOnly: true,
       );
       if (!nativeAppLaunchSucceeded) {
         await launch(
-          'https://youtube.com',
+          url,
           forceSafariVC: true,
         );
       }
diff --git a/packages/url_launcher/url_launcher/example/pubspec.yaml b/packages/url_launcher/url_launcher/example/pubspec.yaml
index 065693e1432c..1eb3e603696f 100644
--- a/packages/url_launcher/url_launcher/example/pubspec.yaml
+++ b/packages/url_launcher/url_launcher/example/pubspec.yaml
@@ -12,6 +12,8 @@ dev_dependencies:
   flutter_driver:
     sdk: flutter
   pedantic: ^1.8.0
+  mockito: ^4.1.1
+  plugin_platform_interface: ^1.0.0
 
 flutter:
   uses-material-design: true
diff --git a/packages/url_launcher/url_launcher/example/test/url_launcher_example_test.dart b/packages/url_launcher/url_launcher/example/test/url_launcher_example_test.dart
new file mode 100644
index 000000000000..41b9f6f5ec6c
--- /dev/null
+++ b/packages/url_launcher/url_launcher/example/test/url_launcher_example_test.dart
@@ -0,0 +1,45 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter/material.dart';
+import 'package:mockito/mockito.dart';
+import 'package:plugin_platform_interface/plugin_platform_interface.dart';
+import 'package:url_launcher_platform_interface/url_launcher_platform_interface.dart';
+import 'package:url_launcher_example/main.dart';
+
+void main() {
+  final MockUrlLauncher mock = MockUrlLauncher();
+  UrlLauncherPlatform.instance = mock;
+
+  testWidgets('Can open URLs', (WidgetTester tester) async {
+    await tester.pumpWidget(MyApp());
+    const String defaultUrl = 'https://www.cylog.org/headers/';
+    when(mock.canLaunch(defaultUrl)).thenAnswer((_) => Future.value(true));
+    const Map<String, String> defaultHeaders = {
+      'my_header_key': 'my_header_value'
+    };
+    verifyNever(mock.launch(defaultUrl,
+        useSafariVC: false,
+        useWebView: false,
+        enableDomStorage: false,
+        enableJavaScript: false,
+        universalLinksOnly: false,
+        headers: defaultHeaders));
+
+    Finder browserlaunchBtn =
+        find.widgetWithText(RaisedButton, 'Launch in browser');
+    expect(browserlaunchBtn, findsOneWidget);
+    await tester.tap(browserlaunchBtn);
+
+    verify(mock.launch(defaultUrl,
+            useSafariVC: false,
+            useWebView: false,
+            enableDomStorage: false,
+            enableJavaScript: false,
+            universalLinksOnly: false,
+            headers: defaultHeaders))
+        .called(1);
+  });
+}
+
+class MockUrlLauncher extends Mock
+    with MockPlatformInterfaceMixin
+    implements UrlLauncherPlatform {}
diff --git a/packages/url_launcher/url_launcher/pubspec.yaml b/packages/url_launcher/url_launcher/pubspec.yaml
index ba929709b01e..f0568e0029c0 100644
--- a/packages/url_launcher/url_launcher/pubspec.yaml
+++ b/packages/url_launcher/url_launcher/pubspec.yaml
@@ -2,7 +2,7 @@ name: url_launcher
 description: Flutter plugin for launching a URL on Android and iOS. Supports
   web, phone, SMS, and email schemes.
 homepage: https://github.com/flutter/plugins/tree/master/packages/url_launcher/url_launcher
-version: 5.4.2
+version: 5.4.3
 
 flutter:
   plugin:
diff --git a/packages/url_launcher/url_launcher_macos/CHANGELOG.md b/packages/url_launcher/url_launcher_macos/CHANGELOG.md
index 6ecac5bd9faf..fc2448201e22 100644
--- a/packages/url_launcher/url_launcher_macos/CHANGELOG.md
+++ b/packages/url_launcher/url_launcher_macos/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 0.0.1+5
+
+* Fixed the launchUniversalLinkIos method.
+
 # 0.0.1+4
 
 * Make the pedantic dev_dependency explicit.
diff --git a/packages/url_launcher/url_launcher_macos/example/lib/main.dart b/packages/url_launcher/url_launcher_macos/example/lib/main.dart
index f079bb272663..b5cce7482d07 100644
--- a/packages/url_launcher/url_launcher_macos/example/lib/main.dart
+++ b/packages/url_launcher/url_launcher_macos/example/lib/main.dart
@@ -90,15 +90,15 @@ class _MyHomePageState extends State<MyHomePage> {
   }
 
   Future<void> _launchUniversalLinkIos(String url) async {
-    if (await canLaunch('https://youtube.com')) {
+    if (await canLaunch(url)) {
       final bool nativeAppLaunchSucceeded = await launch(
-        'https://youtube.com',
+        url,
         forceSafariVC: false,
         universalLinksOnly: true,
       );
       if (!nativeAppLaunchSucceeded) {
         await launch(
-          'https://youtube.com',
+          url,
           forceSafariVC: true,
         );
       }
diff --git a/packages/url_launcher/url_launcher_macos/pubspec.yaml b/packages/url_launcher/url_launcher_macos/pubspec.yaml
index 3f6d5e04b026..04a6b33f1e68 100644
--- a/packages/url_launcher/url_launcher_macos/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_macos/pubspec.yaml
@@ -1,6 +1,6 @@
 name: url_launcher_macos
 description: macOS implementation of the url_launcher plugin.
-version: 0.0.1+4
+version: 0.0.1+5
 homepage: https://github.com/flutter/plugins/tree/master/packages/url_launcher/url_launcher_macos
 
 flutter: