diff --git a/core b/core
index a004497..e3779b9 160000
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit a004497acb0e259105c92b179ab97c3fbb0379b1
+Subproject commit e3779b99a071447cf8b6781a8ae6b414d6106b82
diff --git a/gui/CMakeLists.txt b/gui/CMakeLists.txt
index eca2073..687536c 100644
--- a/gui/CMakeLists.txt
+++ b/gui/CMakeLists.txt
@@ -50,3 +50,5 @@ install(TARGETS sciqlopgui EXPORT SciQLOPGuiConfig
 install(DIRECTORY include/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/SciQLOP)
 install(EXPORT SciQLOPGuiConfig DESTINATION share/SciQLOPGui/cmake)
 export(TARGETS sciqlopgui FILE SciQLOPGuiConfig.cmake)
+
+subdirs(tests)
diff --git a/gui/tests/CMakeLists.txt b/gui/tests/CMakeLists.txt
new file mode 100644
index 0000000..aed9389
--- /dev/null
+++ b/gui/tests/CMakeLists.txt
@@ -0,0 +1 @@
+declare_test(simple_graph simple_graph simple_graph/main.cpp "sciqlopgui;TestUtils;Qt5::Test")
diff --git a/gui/tests/simple_graph/main.cpp b/gui/tests/simple_graph/main.cpp
new file mode 100644
index 0000000..9a01f44
--- /dev/null
+++ b/gui/tests/simple_graph/main.cpp
@@ -0,0 +1,51 @@
+#include <QtTest>
+#include <QObject>
+#include <QString>
+#include <QScreen>
+#include <QMainWindow>
+
+
+#include <SqpApplication.h>
+#include <Variable/VariableController2.h>
+
+#include <Visualization/VisualizationGraphWidget.h>
+#include <TestProviders.h>
+
+
+class A_SimpleGraph : public QObject {
+    Q_OBJECT
+public:
+    A_SimpleGraph(QObject* parent=Q_NULLPTR)
+        :QObject(parent)
+    {
+
+    }
+
+private slots:
+    void scrolls_with_mouse_wheel()
+    {
+        VisualizationGraphWidget w{Q_NULLPTR};
+        auto provider = std::make_shared<SimpleRange<10>>();
+        auto range = DateTimeRange::fromDateTime(QDate(2018,8,7),QTime(14,00),
+                                              QDate(2018,8,7),QTime(16,00));
+        auto var = static_cast<SqpApplication*>(qApp)->variableController().createVariable("V1", {{"","scalar"}}, provider, range);
+        w.addVariable(var, range);
+        while(!static_cast<SqpApplication*>(qApp)->variableController().isReady(var))QCoreApplication::processEvents();
+    }
+};
+
+QT_BEGIN_NAMESPACE
+QTEST_ADD_GPU_BLACKLIST_SUPPORT_DEFS
+QT_END_NAMESPACE \
+int main(int argc, char *argv[])
+{
+    SqpApplication app{argc, argv};
+    app.setAttribute(Qt::AA_Use96Dpi, true);
+    QTEST_DISABLE_KEYPAD_NAVIGATION
+    QTEST_ADD_GPU_BLACKLIST_SUPPORT
+    A_SimpleGraph tc;
+    QTEST_SET_MAIN_SOURCE_PATH
+    return QTest::qExec(&tc, argc, argv);
+}
+
+#include "main.moc"