diff --git a/packages/camera/camera_web/example/integration_test/camera_web_test.dart b/packages/camera/camera_web/example/integration_test/camera_web_test.dart
index 7539dd3..0b35fcf 100644
--- a/packages/camera/camera_web/example/integration_test/camera_web_test.dart
+++ b/packages/camera/camera_web/example/integration_test/camera_web_test.dart
@@ -481,11 +481,39 @@
       );
     });
 
-    testWidgets('takePicture throws UnimplementedError', (tester) async {
-      expect(
-        () => CameraPlatform.instance.takePicture(cameraId),
-        throwsUnimplementedError,
-      );
+    group('takePicture', () {
+      testWidgets(
+          'throws CameraException '
+          'with notFound error '
+          'if the camera does not exist', (tester) async {
+        expect(
+          () => CameraPlatform.instance.initializeCamera(cameraId),
+          throwsA(
+            isA<CameraException>().having(
+              (e) => e.code,
+              'code',
+              CameraErrorCodes.notFound,
+            ),
+          ),
+        );
+      });
+
+      testWidgets('captures a picture', (tester) async {
+        final camera = MockCamera();
+        final capturedPicture = MockXFile();
+
+        when(camera.takePicture)
+            .thenAnswer((_) => Future.value(capturedPicture));
+
+        // Save the camera in the camera plugin.
+        (CameraPlatform.instance as CameraPlugin).cameras[cameraId] = camera;
+
+        final picture = await CameraPlatform.instance.takePicture(cameraId);
+
+        verify(camera.takePicture).called(1);
+
+        expect(picture, equals(capturedPicture));
+      });
     });
 
     testWidgets('prepareForVideoRecording throws UnimplementedError',
diff --git a/packages/camera/camera_web/example/integration_test/helpers/mocks.dart b/packages/camera/camera_web/example/integration_test/helpers/mocks.dart
index fa627ca..54a4f59 100644
--- a/packages/camera/camera_web/example/integration_test/helpers/mocks.dart
+++ b/packages/camera/camera_web/example/integration_test/helpers/mocks.dart
@@ -7,6 +7,7 @@
 
 import 'package:camera_web/src/camera.dart';
 import 'package:camera_web/src/camera_settings.dart';
+import 'package:cross_file/cross_file.dart';
 import 'package:mocktail/mocktail.dart';
 
 class MockWindow extends Mock implements Window {}
@@ -21,6 +22,8 @@
 
 class MockCamera extends Mock implements Camera {}
 
+class MockXFile extends Mock implements XFile {}
+
 /// A fake [MediaStream] that returns the provided [_videoTracks].
 class FakeMediaStream extends Fake implements MediaStream {
   FakeMediaStream(this._videoTracks);
diff --git a/packages/camera/camera_web/lib/src/camera_web.dart b/packages/camera/camera_web/lib/src/camera_web.dart
index 263e053..7a5738d 100644
--- a/packages/camera/camera_web/lib/src/camera_web.dart
+++ b/packages/camera/camera_web/lib/src/camera_web.dart
@@ -271,7 +271,7 @@
 
   @override
   Future<XFile> takePicture(int cameraId) {
-    throw UnimplementedError('takePicture() is not implemented.');
+    return getCamera(cameraId).takePicture();
   }
 
   @override