diff --git a/App/src/TestMesoCrystal1.cpp b/App/src/TestMesoCrystal1.cpp
index 1e32cb0285f117d1dd564126b398a08287f193b5..882ec134d8ddaff5c441324e0f4cca00c88d8aa8 100644
--- a/App/src/TestMesoCrystal1.cpp
+++ b/App/src/TestMesoCrystal1.cpp
@@ -83,7 +83,7 @@ MesoCrystalBuilder::MesoCrystalBuilder()
 , m_sigma_meso_height(4*Units::nanometer)
 , m_sigma_meso_radius(50*Units::nanometer)
 , m_lattice_length_a(6.2*Units::nanometer)
-, m_nanoparticle_radius(5.5*Units::nanometer)
+, m_nanoparticle_radius(6.2*Units::nanometer)
 , m_sigma_nanoparticle_radius(0.2*Units::nanometer)
 , m_sigma_lattice_length_a(2.0*Units::nanometer)
 {
diff --git a/App/src/TestMesoCrystal2.cpp b/App/src/TestMesoCrystal2.cpp
index aadd0d30e5532a598acc1691a787005f1af55edb..4aafa035ead90ff7e4642f114b3e0de4bcaa60ad 100644
--- a/App/src/TestMesoCrystal2.cpp
+++ b/App/src/TestMesoCrystal2.cpp
@@ -91,6 +91,10 @@ void TestMesoCrystal2::execute()
     fitSuite->setMinimizer( new ROOTMinimizer("Minuit2", "Migrad") );
     fitSuite->addFitParameter("*/lattice_length_a", 6.2*Units::nanometer, 0.1*Units::nanometer,
             TRange<double>(2.0*Units::nanometer, 10.0*Units::nanometer) );
+    fitSuite->addFitParameter("*/nanoparticle_radius", 5.7*Units::nanometer, 0.1*Units::nanometer,
+            TRange<double>(2.0*Units::nanometer, 10.0*Units::nanometer) );
+    fitSuite->addFitParameter("*/sigma_nanoparticle_radius", 0.1*Units::nanometer, 0.05*Units::nanometer,
+            TRange<double>(0.01*Units::nanometer, 2.0*Units::nanometer) );
 
     IsGISAXSTools::setMinimum(1e2);
     FitSuiteObserverDraw *drawObserver = new FitSuiteObserverDraw(canvas_name);