diff --git a/tests/test_package.py b/tests/test_package.py
index 764160e..ab442bb 100644
--- a/tests/test_package.py
+++ b/tests/test_package.py
@@ -51,8 +51,8 @@ def transport_particles_on_h5m_geometry(
 
     # initialises a new source object
     my_source = openmc.Source()
-    # sets the location of the source to x=0 y=0 z=0
-    my_source.space = openmc.stats.Point((0, 0, 0))
+    # sets the location of the source to x=0.1 y=0.1 z=0.1 which is not on a vertex
+    my_source.space = openmc.stats.Point((0.1, 0.1, 0.1))
     # sets the direction to isotropic
     my_source.angle = openmc.stats.Isotropic()
     # sets the energy distribution to 100% 14MeV neutrons
diff --git a/vertices_to_h5m/core.py b/vertices_to_h5m/core.py
index dceafee..f4bbddf 100644
--- a/vertices_to_h5m/core.py
+++ b/vertices_to_h5m/core.py
@@ -1,4 +1,4 @@
-from typing import Tuple
+from typing import Iterable, Tuple
 
 import numpy as np
 import trimesh
@@ -16,21 +16,12 @@ def fix_normals(vertices, triangles_in_each_volume):
 def fix_normal(vertices, triangles):
 
     # for triangles in triangles_in_each_volume:
-    print("fixing", triangles)
     mesh = trimesh.Trimesh(vertices=vertices, faces=triangles, process=False)
 
     mesh.fix_normals()
 
-    print("fixed", mesh.faces)
     return mesh.faces
 
-    #     # triangles = mesh.faces
-    #     print('fixed',mesh.faces)
-    #     fixed_triangles.append(mesh.faces)
-    #     print('appending triangles')
-
-    # return fixed_triangles
-
 
 def _define_moab_core_and_tags() -> Tuple[core.Core, dict]:
     """Creates a MOAB Core instance which can be built up by adding sets of
@@ -131,6 +122,7 @@ def add_vertices_to_moab_core(moab_core, vertices, surface_set):
 def add_triangles_to_moab_core(
     material_tag, surface_set, moab_core, tags, triangles, moab_verts, volume_set
 ):
+
     for triangle in triangles:
 
         tri = (
@@ -155,9 +147,6 @@ def add_triangles_to_moab_core(
     return moab_core
 
 
-from typing import Iterable
-
-
 def vertices_to_h5m(
     vertices: Iterable[Tuple[float, float, float]],
     triangles: Iterable[Tuple[int, int, int]],