diff --git a/test/gui/test_gui_DVHStatsWidget.m b/test/gui/test_gui_DVHStatsWidget.m
index 0d1024de7..2a9cbc111 100644
--- a/test/gui/test_gui_DVHStatsWidget.m
+++ b/test/gui/test_gui_DVHStatsWidget.m
@@ -40,4 +40,61 @@
     delete(h);
     close(get(p,'Parent'));
 
+function test_DVHStatsWidget_constructWithPhotonPln
+    evalin('base','load photons_testData.mat');
+    h = matRad_DVHStatsWidget();
+    h.selectedDisplayOption = 'physicalDose';
+    try
+        assertTrue(isa(h, 'matRad_DVHStatsWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
+function test_DVHStatsWidget_constructWithProtonPln
+    evalin('base','load protons_testData.mat');
+    h = matRad_DVHStatsWidget();
+    try
+        assertTrue(isa(h, 'matRad_DVHStatsWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
+function test_DVHStatsWidget_constructWithCarbonPln
+    evalin('base','load carbon_testData.mat');
+    h = matRad_DVHStatsWidget();
+    try
+        assertTrue(isa(h, 'matRad_DVHStatsWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
+function test_DVHStatsWidget_constructWithHeliumPln
+    evalin('base','load helium_testData.mat');
+    h = matRad_DVHStatsWidget();
+    try
+        assertTrue(isa(h, 'matRad_DVHStatsWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
 %TODO: Test Buttons / visibility depending on data
\ No newline at end of file
diff --git a/test/gui/test_gui_PlanWidget.m b/test/gui/test_gui_PlanWidget.m
index 483aa8b86..d397da83d 100644
--- a/test/gui/test_gui_PlanWidget.m
+++ b/test/gui/test_gui_PlanWidget.m
@@ -40,7 +40,7 @@
     delete(h);
     close(get(p,'Parent'));
 
-function test_PlanWidget_constructWithData
+function test_PlanWidget_constructWithTG119
     evalin('base','load TG119.mat');
     h = matRad_PlanWidget();
     try
@@ -52,6 +52,63 @@
         rethrow(ME);
     end
     evalin('base','clear ct cst pln');
-    delete(h);   
+    delete(h);
+
+function test_PlanWidget_constructWithPhotonPln
+    evalin('base','load photons_testData.mat');
+    h = matRad_PlanWidget();
+    try
+        assertTrue(isa(h, 'matRad_PlanWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
+function test_PlanWidget_constructWithProtonPln
+    evalin('base','load protons_testData.mat');
+    h = matRad_PlanWidget();
+    try
+        assertTrue(isa(h, 'matRad_PlanWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
+function test_PlanWidget_constructWithCarbonPln
+    evalin('base','load carbon_testData.mat');
+    h = matRad_PlanWidget();
+    try
+        assertTrue(isa(h, 'matRad_PlanWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
+function test_PlanWidget_constructWithHeliumPln
+    evalin('base','load helium_testData.mat');
+    h = matRad_PlanWidget();
+    try
+        assertTrue(isa(h, 'matRad_PlanWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
 
-%TODO: Test Buttons / visibility depending on data
\ No newline at end of file
+%TODO: Test Buttons
\ No newline at end of file
diff --git a/test/gui/test_gui_exportWidget.m b/test/gui/test_gui_exportWidget.m
index fb39d2a47..4042973d5 100644
--- a/test/gui/test_gui_exportWidget.m
+++ b/test/gui/test_gui_exportWidget.m
@@ -55,4 +55,18 @@
     evalin('base','clear ct cst pln');
     delete(h);
 
+function test_exportWidget_constructWithCarbonPln
+    evalin('base','load carbon_testData.mat');
+    h = matRad_exportWidget();
+    try
+        assertTrue(isa(h, 'matRad_exportWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
 %TODO: Test Buttons / visibility depending on data
\ No newline at end of file
diff --git a/test/gui/test_gui_viewingWidget.m b/test/gui/test_gui_viewingWidget.m
index 91a33bd72..db112f800 100644
--- a/test/gui/test_gui_viewingWidget.m
+++ b/test/gui/test_gui_viewingWidget.m
@@ -40,7 +40,7 @@
     delete(h);
     close(get(p,'Parent'));
 
-function test_viewingWidget_constructWithData
+function test_viewingWidget_constructWithTG119
     evalin('base','load TG119.mat');
     h = matRad_ViewingWidget();
     try
@@ -53,4 +53,60 @@
     evalin('base','clear ct cst pln');
     delete(h);
 
+function test_ViewingWidget_constructWithPhotonPln
+    evalin('base','load photons_testData.mat');
+    h = matRad_ViewingWidget();
+    try
+        assertTrue(isa(h, 'matRad_ViewingWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
+function test_ViewingWidget_constructWithProtonPln
+    evalin('base','load protons_testData.mat');
+    h = matRad_ViewingWidget();
+    try
+        assertTrue(isa(h, 'matRad_ViewingWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
+function test_ViewingWidget_constructWithCarbonPln
+    evalin('base','load carbon_testData.mat');
+    h = matRad_ViewingWidget();
+    try
+        assertTrue(isa(h, 'matRad_ViewingWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
+function test_ViewingWidget_constructWithHeliumPln
+    evalin('base','load helium_testData.mat');
+    h = matRad_ViewingWidget();
+    try
+        assertTrue(isa(h, 'matRad_ViewingWidget'));
+        assertTrue(isa(h, 'matRad_Widget'));
+    catch ME
+        evalin('base','clear ct cst pln stf dij resultGUI');
+        delete(h);
+        rethrow(ME);
+    end
+    evalin('base','clear ct cst pln stf dij resultGUI');
+    delete(h);
+
 %TODO: Test Buttons / visibility depending on data
\ No newline at end of file