diff --git a/packages/google_sign_in/google_sign_in_web/CHANGELOG.md b/packages/google_sign_in/google_sign_in_web/CHANGELOG.md
index 86b1a053fd7..03924506928 100644
--- a/packages/google_sign_in/google_sign_in_web/CHANGELOG.md
+++ b/packages/google_sign_in/google_sign_in_web/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.1
+
+* Fixes Bad state: Future already completed on the web.
+
 ## NEXT
 
 * Updates minimum supported SDK version to Flutter 3.29/Dart 3.7.
diff --git a/packages/google_sign_in/google_sign_in_web/example/integration_test/google_sign_in_web_test.dart b/packages/google_sign_in/google_sign_in_web/example/integration_test/google_sign_in_web_test.dart
index 57fdaa78986..0f6b9b63762 100644
--- a/packages/google_sign_in/google_sign_in_web/example/integration_test/google_sign_in_web_test.dart
+++ b/packages/google_sign_in/google_sign_in_web/example/integration_test/google_sign_in_web_test.dart
@@ -90,35 +90,6 @@ void main() {
         );
       }, throwsAssertionError);
     });
-
-    testWidgets('must be called for most of the API to work', (_) async {
-      expect(() async {
-        await plugin.attemptLightweightAuthentication(
-          const AttemptLightweightAuthenticationParameters(),
-        );
-      }, throwsStateError);
-
-      expect(() async {
-        await plugin.clientAuthorizationTokensForScopes(
-          const ClientAuthorizationTokensForScopesParameters(
-            request: AuthorizationRequestDetails(
-              scopes: <String>[],
-              userId: null,
-              email: null,
-              promptIfUnauthorized: false,
-            ),
-          ),
-        );
-      }, throwsStateError);
-
-      expect(() async {
-        await plugin.signOut(const SignOutParams());
-      }, throwsStateError);
-
-      expect(() async {
-        await plugin.disconnect(const DisconnectParams());
-      }, throwsStateError);
-    });
   });
 
   group('support queries', () {
diff --git a/packages/google_sign_in/google_sign_in_web/lib/google_sign_in_web.dart b/packages/google_sign_in/google_sign_in_web/lib/google_sign_in_web.dart
index 3142536fb5e..bf75c0505d6 100644
--- a/packages/google_sign_in/google_sign_in_web/lib/google_sign_in_web.dart
+++ b/packages/google_sign_in/google_sign_in_web/lib/google_sign_in_web.dart
@@ -49,10 +49,9 @@ class GoogleSignInPlugin extends GoogleSignInPlatform {
     @visibleForTesting GisSdkClient? debugOverrideGisSdkClient,
     @visibleForTesting
     StreamController<AuthenticationEvent>? debugAuthenticationController,
-  }) : _gisSdkClient = debugOverrideGisSdkClient,
-       _authenticationController =
-           debugAuthenticationController ??
-           StreamController<AuthenticationEvent>.broadcast() {
+  })  : _gisSdkClient = debugOverrideGisSdkClient,
+        _authenticationController = debugAuthenticationController ??
+            StreamController<AuthenticationEvent>.broadcast() {
     autoDetectedClientId = web.document
         .querySelector(clientIdMetaSelector)
         ?.getAttribute(clientIdAttributeName);
@@ -68,8 +67,6 @@ class GoogleSignInPlugin extends GoogleSignInPlatform {
 
   // A future that completes when the JS loader is done.
   late Future<void> _jsSdkLoadedFuture;
-  // A future that completes when the `init` call is done.
-  Completer<void>? _initCalled;
 
   // A StreamController to communicate status changes from the GisSdkClient.
   final StreamController<AuthenticationEvent> _authenticationController;
@@ -89,28 +86,14 @@ class GoogleSignInPlugin extends GoogleSignInPlatform {
     return _gisSdkClient!;
   }
 
-  // This method throws if init or initWithParams hasn't been called at some
-  // point in the past. It is used by the [initialized] getter to ensure that
-  // users can't await on a Future that will never resolve.
-  void _assertIsInitCalled() {
-    if (_initCalled == null) {
-      throw StateError(
-        'GoogleSignInPlugin::init() or GoogleSignInPlugin::initWithParams() '
-        'must be called before any other method in this plugin.',
-      );
-    }
-  }
-
   /// A future that resolves when the plugin is fully initialized.
   ///
   /// This ensures that the SDK has been loaded, and that the `init` method
   /// has finished running.
   @visibleForTesting
   Future<void> get initialized {
-    _assertIsInitCalled();
     return Future.wait<void>(<Future<void>>[
       _jsSdkLoadedFuture,
-      _initCalled!.future,
     ]);
   }
 
@@ -133,12 +116,8 @@ class GoogleSignInPlugin extends GoogleSignInPlatform {
       ' or pass clientId when initializing GoogleSignIn',
     );
 
-    assert(
-      params.serverClientId == null,
-      'serverClientId is not supported on Web.',
-    );
-
-    _initCalled = Completer<void>();
+    assert(params.serverClientId == null,
+        'serverClientId is not supported on Web.');
 
     await _jsSdkLoadedFuture;
 
@@ -149,8 +128,6 @@ class GoogleSignInPlugin extends GoogleSignInPlatform {
       authenticationController: _authenticationController,
       loggingEnabled: kDebugMode,
     );
-
-    _initCalled!.complete(); // Signal that `init` is fully done.
   }
 
   @override
diff --git a/packages/google_sign_in/google_sign_in_web/pubspec.yaml b/packages/google_sign_in/google_sign_in_web/pubspec.yaml
index f53d3f0b213..6fa54d1a694 100644
--- a/packages/google_sign_in/google_sign_in_web/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in_web/pubspec.yaml
@@ -3,7 +3,7 @@ description: Flutter plugin for Google Sign-In, a secure authentication system
   for signing in with a Google account on Android, iOS and Web.
 repository: https://github.com/flutter/packages/tree/main/packages/google_sign_in/google_sign_in_web
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+google_sign_in%22
-version: 1.0.0
+version: 1.0.1
 
 environment:
   sdk: ^3.7.0