diff --git a/autotests/MissingTableTest.cpp b/autotests/MissingTableTest.cpp
index c94c6040..1332d771 100644
--- a/autotests/MissingTableTest.cpp
+++ b/autotests/MissingTableTest.cpp
@@ -1,84 +1,89 @@
 /* This file is part of the KDE project
    Copyright (C) 2018 Jarosław Staniek <staniek@kde.org>
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
    This library 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
    Library General Public License for more details.
 
    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
 */
 
 #include <KDbTestUtils.h>
 #include <KDbConnectionData>
 #include <KDbConnectionOptions>
 
 class MissingTableTest : public QObject
 {
     Q_OBJECT
 private Q_SLOTS:
     void initTestCase();
     void init();
     //! Tests if the list of tables skips name for which physical table is missing.
     //! The missingTableTest.kexi file has "persons" table deleted.
     void testListTables();
     void cleanupTestCase();
     void cleanup();
 
 private:
     //! Opens database needed for tests
     bool openDatabase(const QString &path);
 
     KDbTestUtils m_utils;
 };
 
 void MissingTableTest::initTestCase()
 {
 }
 
 void MissingTableTest::init()
 {
     QString dir(QFile::decodeName(FILES_DATA_DIR));
     QVERIFY(openDatabase(dir + "/missingTableTest.kexi"));
 }
 
 
 bool MissingTableTest::openDatabase(const QString &path)
 {
     KDbConnectionOptions options;
     options.setReadOnly(true);
     return m_utils.testConnectAndUse(path, options);
 }
 
 void MissingTableTest::testListTables()
 {
     const bool alsoSystemTables = true;
     bool ok;
     QStringList foundTableNames = m_utils.connection->tableNames(alsoSystemTables, &ok);
     QVERIFY(ok);
+
+    // call again with ok == nullptr
+    QCOMPARE(foundTableNames, m_utils.connection->tableNames(alsoSystemTables));
+
+    // make sure missing table is not present
     std::sort(foundTableNames.begin(), foundTableNames.end());
     const QStringList expectedTables(
         { "cars", "kexi__db", "kexi__fields", "kexi__objectdata", "kexi__objects" });
     QCOMPARE(foundTableNames, expectedTables);
 }
 
 void MissingTableTest::cleanup()
 {
     QVERIFY(m_utils.testDisconnect());
 }
 
 void MissingTableTest::cleanupTestCase()
 {
 }
 
 QTEST_GUILESS_MAIN(MissingTableTest)
 
 #include "MissingTableTest.moc"