Remove solo_group accidentally left in test.
diff --git a/test/src/window_test.dart b/test/src/window_test.dart
index 6e9a528..5546ca5 100644
--- a/test/src/window_test.dart
+++ b/test/src/window_test.dart
@@ -4,7 +4,7 @@
 import 'package:webdriver/webdriver.dart';
 
 void main() {
-  solo_group('Window', () {
+  group('Window', () {
     WebDriver driver;
 
     setUp(() async {