diff --git a/kmail/grammarplugins/languagetool/autotests/languagetoolconfigwidgettest.cpp b/kmail/grammarplugins/languagetool/autotests/languagetoolconfigwidgettest.cpp
index 8a2a9745..e3742085 100644
--- a/kmail/grammarplugins/languagetool/autotests/languagetoolconfigwidgettest.cpp
+++ b/kmail/grammarplugins/languagetool/autotests/languagetoolconfigwidgettest.cpp
@@ -1,73 +1,93 @@
 /*
    Copyright (C) 2019 Montel Laurent <montel@kde.org>
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; see the file COPYING.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
 */
 
 #include "languagetoolconfigwidgettest.h"
 #include "languagetoolconfigwidget.h"
 #include "languagetoolcombobox.h"
 #include "kdepimtest_layout.h"
 #include <QCheckBox>
 #include <QLabel>
 #include <QLineEdit>
 #include <QTest>
 #include <QVBoxLayout>
 #include <QStandardPaths>
 #include <QToolButton>
 
 QTEST_MAIN(LanguageToolConfigWidgetTest)
 LanguageToolConfigWidgetTest::LanguageToolConfigWidgetTest(QObject *parent)
     : QObject(parent)
 {
     QStandardPaths::setTestModeEnabled(true);
 }
 
 void LanguageToolConfigWidgetTest::shouldHaveDefaultValue()
 {
     LanguageToolConfigWidget w;
     QVBoxLayout *mainLayout = w.findChild<QVBoxLayout *>(QStringLiteral("mainlayout"));
     QVERIFY(mainLayout);
     KdepimTestLayout::checkContentsMargins(0, mainLayout);
 
     QCheckBox *mUseLocalInstance = w.findChild<QCheckBox *>(QStringLiteral("uselocalinstance"));
     QVERIFY(mUseLocalInstance);
     QVERIFY(!mUseLocalInstance->text().isEmpty());
     QVERIFY(!mUseLocalInstance->isChecked());
 
     QLabel *instancePathLabel = w.findChild<QLabel *>(QStringLiteral("instancepath"));
     QVERIFY(instancePathLabel);
     QVERIFY(!instancePathLabel->text().isEmpty());
     QVERIFY(!instancePathLabel->isEnabled());
 
     QLineEdit *mInstancePath = w.findChild<QLineEdit *>(QStringLiteral("instancepath"));
     QVERIFY(mInstancePath);
     //We load default value
     QVERIFY(!mInstancePath->text().isEmpty());
     QVERIFY(!mInstancePath->isEnabled());
     QVERIFY(mInstancePath->isClearButtonEnabled());
 
     QLabel *languageLabel = w.findChild<QLabel *>(QStringLiteral("languageLabel"));
     QVERIFY(languageLabel);
     QVERIFY(!languageLabel->text().isEmpty());
 
     LanguageToolComboBox *mLanguageToolCombobox = w.findChild<LanguageToolComboBox *>(QStringLiteral("languagecombobox"));
     QVERIFY(mLanguageToolCombobox);
 
     QToolButton *refreshButton = w.findChild<QToolButton *>(QStringLiteral("refreshbutton"));
     QVERIFY(refreshButton);
     QVERIFY(!refreshButton->icon().isNull());
 }
+
+void LanguageToolConfigWidgetTest::shouldUpdateWidgets()
+{
+    LanguageToolConfigWidget w;
+
+    QCheckBox *mUseLocalInstance = w.findChild<QCheckBox *>(QStringLiteral("uselocalinstance"));
+
+    QLabel *instancePathLabel = w.findChild<QLabel *>(QStringLiteral("instancepath"));
+
+    QLineEdit *mInstancePath = w.findChild<QLineEdit *>(QStringLiteral("instancepath"));
+    mUseLocalInstance->setChecked(true);
+    QVERIFY(mUseLocalInstance->isEnabled());
+    QVERIFY(instancePathLabel->isEnabled());
+    QVERIFY(mInstancePath->isEnabled());
+
+    mUseLocalInstance->setChecked(false);
+    QVERIFY(mUseLocalInstance->isEnabled());
+    QVERIFY(!instancePathLabel->isEnabled());
+    QVERIFY(!mInstancePath->isEnabled());
+}
diff --git a/kmail/grammarplugins/languagetool/autotests/languagetoolconfigwidgettest.h b/kmail/grammarplugins/languagetool/autotests/languagetoolconfigwidgettest.h
index e970e3ab..f536213a 100644
--- a/kmail/grammarplugins/languagetool/autotests/languagetoolconfigwidgettest.h
+++ b/kmail/grammarplugins/languagetool/autotests/languagetoolconfigwidgettest.h
@@ -1,35 +1,36 @@
 /*
    Copyright (C) 2019 Montel Laurent <montel@kde.org>
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; see the file COPYING.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
 */
 
 #ifndef LANGUAGETOOLCONFIGWIDGETTEST_H
 #define LANGUAGETOOLCONFIGWIDGETTEST_H
 
 #include <QObject>
 
 class LanguageToolConfigWidgetTest : public QObject
 {
     Q_OBJECT
 public:
     explicit LanguageToolConfigWidgetTest(QObject *parent = nullptr);
     ~LanguageToolConfigWidgetTest() = default;
 private Q_SLOTS:
     void shouldHaveDefaultValue();
+    void shouldUpdateWidgets();
 };
 
 #endif // LANGUAGETOOLCONFIGWIDGETTEST_H