diff --git a/pubspec.lock b/pubspec.lock
index decbaec..184265f 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -50,6 +50,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.15.0"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
   fake_async:
     dependency: transitive
     description:
@@ -57,6 +64,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.0"
+  faker:
+    dependency: "direct dev"
+    description:
+      name: faker
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
   flutter:
     dependency: "direct main"
     description: flutter
diff --git a/pubspec.yaml b/pubspec.yaml
index 47792e8..716bbe5 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -18,6 +18,8 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  faker: ^2.0.0
+
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
diff --git a/test/list_custom_grouped_test.dart b/test/list_custom_grouped_test.dart
new file mode 100644
index 0000000..1e92471
--- /dev/null
+++ b/test/list_custom_grouped_test.dart
@@ -0,0 +1,121 @@
+import 'package:checkbox_grouped/checkbox_grouped.dart';
+import 'package:checkbox_grouped/src/widgets/custom_grouped_checkbox.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() async {
+  testWidgets(" test list custom grouped ", (tester) async {
+    final controller =
+        ListCustomGroupController(isMultipleSelectionPerGroup: [true, false]);
+    final datas = [
+      List<int>.generate(
+        3,
+        (i) => i + 1,
+      ),
+      List<String>.generate(
+        3,
+        (i) => "name-${i + 1}",
+      )
+    ];
+    await tester.pumpWidget(
+        MaterialApp(
+          home: Scaffold(
+            body: ListCustomGroupedCheckbox(
+              controller: controller,
+              isScrollable: true,
+              titleGroupedAlignment: Alignment.centerLeft,
+              groupTitles: ["Users", "Names"],
+              children: [
+                CustomIndexedWidgetBuilder(
+                  itemBuilder: (ctx, index, selected, isDisabled) {
+                    return Card(
+                      margin: EdgeInsets.only(
+                        top: 5.0,
+                        bottom: 5.0,
+                      ),
+                      child: ListTile(
+                        tileColor: selected ? Colors.green[300] : Colors.white,
+                        title: Text(
+                          "${datas[0][index]}",
+                        ),
+                        trailing: Opacity(
+                          opacity: selected ? 1 : 0,
+                          child: Icon(
+                            Icons.check,
+                            color: Colors.white,
+                            size: 24,
+                          ),
+                        ),
+                      ),
+                    );
+                  },
+                ),
+                CustomGridIndexedWidgetBuilder(
+                    itemBuilder: (ctx, index, selected, isDisabled) {
+                      return Card(
+                        color: selected ? Colors.green[300] : Colors.white,
+                        shape: RoundedRectangleBorder(
+                          borderRadius: BorderRadius.circular(
+                            12.0,
+                          ),
+                        ),
+                        margin: EdgeInsets.only(
+                          top: 5.0,
+                          bottom: 5.0,
+                        ),
+                        child: Stack(
+                          children: [
+                            Center(
+                              child: Text(
+                                datas[1][index] as String,
+                                maxLines: 3,
+                                overflow: TextOverflow.fade,
+                              ),
+                            ),
+                            Positioned(
+                              top: 5,
+                              right: 8,
+                              child: Opacity(
+                                opacity: selected ? 1 : 0,
+                                child: Icon(
+                                  Icons.check,
+                                  color: Colors.white,
+                                  size: 24,
+                                ),
+                              ),
+                            ),
+                          ],
+                        ),
+                      );
+                    },
+                    gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
+                        crossAxisCount: 3, crossAxisSpacing: 5.0)),
+              ],
+              listValuesByGroup: datas,
+            ),
+          ),
+        ),
+        Duration(seconds: 30));
+
+    await tester.pump();
+
+    await tester.tap(find.byType(ItemWidget).first);
+
+    await tester.pump(Duration(seconds: 10));
+    await tester.tap(find.byType(ItemWidget).at(3));
+    await tester.pump(Duration(seconds: 10));
+
+    var result = await controller.allSelectedItemsGrouped;
+    var actualResult = [
+      [1],
+      "name-1"
+    ];
+    expect(result.length, 2);
+    expect(result, actualResult);
+    await tester.tap(find.byType(ItemWidget).first);
+    await tester.pump(Duration(seconds: 10));
+    result = await controller.allSelectedItemsGrouped;
+    actualResult = [[], "name-1"];
+    expect(result, actualResult);
+  });
+}