diff --git a/tests/checkboxes/main.cpp b/tests/checkboxes/main.cpp
index 2895344b..234753c0 100644
--- a/tests/checkboxes/main.cpp
+++ b/tests/checkboxes/main.cpp
@@ -46,5 +46,164 @@ void CheckBoxTests::triState() {
     QVERIFY( t->isTriState() == true );
 }
 
+void CheckBoxTests::higherGroupUpdatesLower() {
+    auto t = new QskCheckBox( root );
+    auto t1 = new QskCheckBox( root );
+    auto t2 = new QskCheckBox( root );
+    auto t3 = new QskCheckBox( root );
+
+    t->addToGroup( t1 );
+    t->addToGroup( t2 );
+    t->addToGroup( t3 );
+
+    QVERIFY( t->isChecked() == false );
+    QVERIFY( t1->isChecked() == false );
+    QVERIFY( t2->isChecked() == false );
+    QVERIFY( t3->isChecked() == false );
+
+    t->setChecked( true );
+    QVERIFY( t->isChecked() );
+    QVERIFY( t1->isChecked() );
+    QVERIFY( t2->isChecked() );
+    QVERIFY( t3->isChecked() );
+
+    t->setChecked( false );
+    QVERIFY( t->isChecked() == false );
+    QVERIFY( t1->isChecked() == false );
+    QVERIFY( t2->isChecked() == false );
+    QVERIFY( t3->isChecked() == false );
+
+}
+void CheckBoxTests::lowerGroupUpdatesHigher() {
+    auto t = new QskCheckBox( root );
+
+    auto t1 = new QskCheckBox( root );
+    auto t2 = new QskCheckBox( root );
+
+    t->addToGroup( t1 );
+    t->addToGroup( t2 );
+
+    t1->setChecked( true );
+    QVERIFY( t->isChecked() );
+    QVERIFY( t->isTriState() );
+    QVERIFY( t->checkState() == Qt::CheckState::PartiallyChecked );
+    QVERIFY( t1->isChecked() == true );
+    QVERIFY( t2->isChecked() == false );
+
+
+    t2->setChecked( true );
+    QVERIFY( t->isChecked() );
+    QVERIFY( t->isTriState() );
+    QVERIFY( t->checkState() == Qt::CheckState::Checked );
+    QVERIFY( t1->isChecked() == true );
+    QVERIFY( t2->isChecked() == true );
+
+    t1->setChecked( false );
+    QVERIFY( t->isChecked() );
+    QVERIFY( t->isTriState() );
+    QVERIFY( t->checkState() == Qt::CheckState::PartiallyChecked );
+    QVERIFY( t1->isChecked() == false );
+    QVERIFY( t2->isChecked() == true );
+
+    t2->setChecked( false );
+    QVERIFY( t->isChecked() == false );
+    QVERIFY( t->isTriState() );
+    QVERIFY( t->checkState() == Qt::CheckState::Unchecked );
+    QVERIFY( t1->isChecked() == false );
+    QVERIFY( t2->isChecked() == false );
+}
+
+void CheckBoxTests::addToGroup() {
+    auto t = new QskCheckBox( root );
+
+    auto t1 = new QskCheckBox( root );
+    auto t2 = new QskCheckBox( root );
+
+    t->addToGroup( t1 );
+    t->addToGroup( t2 );
+
+    t->setChecked( true );
+    QVERIFY( t->isChecked() );
+    QVERIFY( t1->isChecked() );
+    QVERIFY( t2->isChecked() );
+
+    auto t3 = new QskCheckBox( root );
+    t->addToGroup( t3 );
+
+    QVERIFY( t->checkState() == Qt::CheckState::PartiallyChecked );
+
+    t3->setChecked( true );
+    QVERIFY( t->checkState() == Qt::CheckState::Checked );
+    auto t4 = new QskCheckBox( root );
+    t4->setChecked( true );
+    t->addToGroup( t4 );
+    QVERIFY( t->checkState() == Qt::CheckState::Checked );
+}
+
+void CheckBoxTests::addPartlyToGroup() {
+    auto t = new QskCheckBox( root );
+
+    auto t1 = new QskCheckBox( root );
+    auto t1a = new QskCheckBox( root );
+    auto t1b = new QskCheckBox( root );
+
+    t1->addToGroup( t1a );
+    t1->addToGroup( t1b );
+
+    t1a->setChecked( true );
+
+    QVERIFY( t1->checkState() == Qt::CheckState::PartiallyChecked );
+    t->addToGroup( t1 );
+    QVERIFY( t1->checkState() == Qt::CheckState::PartiallyChecked );
+}
+
+
+void CheckBoxTests::removeFromGroup() {
+    auto t = new QskCheckBox( root );
+
+    auto t1 = new QskCheckBox( root );
+    auto t2 = new QskCheckBox( root );
+
+    t->addToGroup( t1 );
+    t->addToGroup( t2 );
+
+    t2->setChecked( true );
+    QVERIFY( t->checkState() == Qt::CheckState::PartiallyChecked );
+
+    t->removeFromGroup( t2 );
+    QVERIFY( t->isChecked() == false );
+}
+
+void CheckBoxTests::groupMemberGetsDeleted() {
+    auto t = new QskCheckBox( root );
+    auto t1 = new QskCheckBox( root );
+    auto t2 = new QskCheckBox( root );
+
+    t->addToGroup( t1 );
+    t->addToGroup( t2 );
+
+    t2->setChecked( true );
+    QVERIFY( t->checkState() == Qt::CheckState::PartiallyChecked );
+
+    delete t2;
+    QVERIFY( t->isChecked() == false );
+}
+
+void CheckBoxTests::addTwiceToSameGroup() {
+    auto t = new QskCheckBox( root );
+
+    auto t1 = new QskCheckBox( root );
+    auto t2 = new QskCheckBox( root );
+
+    t->addToGroup( t1 );
+    t->addToGroup( t1 );
+    t->removeFromGroup( t1 );
+
+    t->addToGroup( t2 );
+
+    t2->setChecked( true );
+
+    QVERIFY( t->checkState() == Qt::CheckState::Checked );
+}
 #include "moc_main.cpp"
 
diff --git a/tests/checkboxes/main.h b/tests/checkboxes/main.h
index b0efc3c3..5f5b5e93 100644
--- a/tests/checkboxes/main.h
+++ b/tests/checkboxes/main.h
@@ -17,6 +17,13 @@ class CheckBoxTests : public QObject
     void click();
     void toggle();
     void triState();
+    void higherGroupUpdatesLower();
+    void lowerGroupUpdatesHigher();
+    void addToGroup();
+    void addPartlyToGroup();
+    void removeFromGroup();
+    void groupMemberGetsDeleted();
+    void addTwiceToSameGroup();
 };
 
 QTEST_MAIN(CheckBoxTests)