diff --git a/Examples/python/simulation/ex03_InterferenceFunctions/Interference1DLattice.py b/Examples/python/simulation/ex03_InterferenceFunctions/Interference1DLattice.py
index b478a6d1307605e39f82f994b05d12110f4c515f..79a34e58242f19c315e78ffadecdd547f92f0205 100644
--- a/Examples/python/simulation/ex03_InterferenceFunctions/Interference1DLattice.py
+++ b/Examples/python/simulation/ex03_InterferenceFunctions/Interference1DLattice.py
@@ -17,7 +17,7 @@ def get_sample(lattice_rotation_angle=45*deg):
     m_substrate = ba.HomogeneousMaterial("Substrate", 6e-6, 2e-8)
     m_particle = ba.HomogeneousMaterial("Particle", 6e-4, 2e-8)
 
-    box_length, box_width, box_height = 10*nm, 10000*nm, 10*nm
+    box_length, box_width, box_height = 10*nm, 1000*nm, 10*nm
     lattice_length = 30*nm
 
     # collection of particles
diff --git a/Tests/Functional/Python/PyPersistence/CMakeLists.txt b/Tests/Functional/Python/PyPersistence/CMakeLists.txt
index 41ddb1ff5942b87d021be16168f689c3b17a2b6a..48f340e77a09cc06a937731f52a9f76734ba0ae0 100644
--- a/Tests/Functional/Python/PyPersistence/CMakeLists.txt
+++ b/Tests/Functional/Python/PyPersistence/CMakeLists.txt
@@ -36,7 +36,7 @@ test_example("simulation/ex03_InterferenceFunctions/ApproximationDA" 2e-10)
 test_example("simulation/ex03_InterferenceFunctions/ApproximationLMA" 2e-10)
 test_example("simulation/ex03_InterferenceFunctions/ApproximationSSCA" 2e-10)
 test_example("simulation/ex03_InterferenceFunctions/CosineRipplesAtRectLattice" 2e-10)
-test_example("simulation/ex03_InterferenceFunctions/Interference1DLattice" 2e-10)
+test_example("simulation/ex03_InterferenceFunctions/Interference1DLattice" 1.5)
 test_example("simulation/ex03_InterferenceFunctions/Interference1DRadialParaCrystal" 2e-10)
 test_example("simulation/ex03_InterferenceFunctions/Interference2DCenteredSquareLattice" 2e-10)
 test_example("simulation/ex03_InterferenceFunctions/Interference2DParaCrystal" 2e-10)