diff --git a/src/dolphinmainwindow.cpp b/src/dolphinmainwindow.cpp
index e28e540d15..8d580432f7 100644
--- a/src/dolphinmainwindow.cpp
+++ b/src/dolphinmainwindow.cpp
@@ -124,6 +124,7 @@ DolphinMainWindow::DolphinMainWindow() :
     setAcceptDrops(true);
 
     m_tabWidget = new DolphinTabWidget(this);
+    m_tabWidget->setObjectName("tabWidget");
     connect(m_tabWidget, &DolphinTabWidget::activeViewChanged,
             this, &DolphinMainWindow::activeViewChanged);
     connect(m_tabWidget, &DolphinTabWidget::tabCountChanged,
diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
index fa47ca2cb6..1c2335cbfd 100644
--- a/src/tests/CMakeLists.txt
+++ b/src/tests/CMakeLists.txt
@@ -52,3 +52,8 @@ LINK_LIBRARIES dolphinprivate dolphinstatic Qt5::Test)
 ecm_add_test(viewpropertiestest.cpp testdir.cpp
 TEST_NAME viewpropertiestest
 LINK_LIBRARIES dolphinprivate dolphinstatic Qt5::Test)
+
+# DolphinMainWindowTest
+ecm_add_test(dolphinmainwindowtest.cpp
+TEST_NAME dolphinmainwindowtest
+LINK_LIBRARIES dolphinprivate dolphinstatic Qt5::Test)
diff --git a/src/tests/dolphinmainwindowtest.cpp b/src/tests/dolphinmainwindowtest.cpp
new file mode 100644
index 0000000000..be86c5016f
--- /dev/null
+++ b/src/tests/dolphinmainwindowtest.cpp
@@ -0,0 +1,69 @@
+/***************************************************************************
+ *   Copyright (C) 2017 by Elvis Angelaccio <elvis.angelaccio@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; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
+ ***************************************************************************/
+
+#include "dolphinmainwindow.h"
+#include "dolphintabpage.h"
+#include "dolphintabwidget.h"
+#include "dolphinviewcontainer.h"
+
+#include <QTest>
+
+class DolphinMainWindowTest : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void init();
+    void testClosingTabsWithSearchBoxVisible();
+
+private:
+    QScopedPointer<DolphinMainWindow> m_mainWindow;
+};
+
+void DolphinMainWindowTest::init()
+{
+    m_mainWindow.reset(new DolphinMainWindow());
+}
+
+// See https://bugs.kde.org/show_bug.cgi?id=379135
+void DolphinMainWindowTest::testClosingTabsWithSearchBoxVisible()
+{
+    m_mainWindow->openDirectories({ QUrl::fromLocalFile(QDir::homePath()) }, false);
+    m_mainWindow->show();
+    // Without this call the searchbox doesn't get FocusIn events.
+    QTest::qWaitForWindowExposed(m_mainWindow.data());
+    QVERIFY(m_mainWindow->isVisible());
+
+    auto tabWidget = m_mainWindow->findChild<DolphinTabWidget*>("tabWidget");
+    QVERIFY(tabWidget);
+
+    // Show search box on first tab.
+    tabWidget->currentTabPage()->activeViewContainer()->setSearchModeEnabled(true);
+
+    tabWidget->openNewActivatedTab(QUrl::fromLocalFile(QDir::homePath()));
+    QCOMPARE(tabWidget->count(), 2);
+
+    // Triggers the crash in bug #379135.
+    tabWidget->closeTab();
+    QCOMPARE(tabWidget->count(), 1);
+}
+
+QTEST_MAIN(DolphinMainWindowTest)
+
+#include "dolphinmainwindowtest.moc"