diff --git a/src/Unittests/unittests_convert_meshes.cc b/src/Unittests/unittests_convert_meshes.cc
index 4ca3bfe1..bfb106f4 100644
--- a/src/Unittests/unittests_convert_meshes.cc
+++ b/src/Unittests/unittests_convert_meshes.cc
@@ -54,6 +54,49 @@ class OpenMeshConvertTriangleMeshToPoly : public OpenMeshBase {
     //Mesh mesh_;  
 };
 
+class OpenMeshConvertPolyMeshToTriangle : public OpenMeshBasePoly {
+
+    protected:
+
+        // This function is called before each test is run
+        virtual void SetUp() {
+          mesh_.clear();
+
+          // Add some vertices
+          Mesh::VertexHandle vhandle[4];
+
+          vhandle[0] = mesh_.add_vertex(Mesh::Point(0, 0, 0));
+          vhandle[1] = mesh_.add_vertex(Mesh::Point(0, 1, 0));
+          vhandle[2] = mesh_.add_vertex(Mesh::Point(1, 1, 0));
+          vhandle[3] = mesh_.add_vertex(Mesh::Point(1, 0, 0));
+
+          // Add two faces
+          std::vector<Mesh::VertexHandle> face_vhandles;
+
+          face_vhandles.push_back(vhandle[2]);
+          face_vhandles.push_back(vhandle[1]);
+          face_vhandles.push_back(vhandle[0]);
+          face_vhandles.push_back(vhandle[3]);
+          mesh_.add_face(face_vhandles);
+
+          // Test setup:
+          //  1 --- 2
+          //  |     |
+          //  |     |
+          //  |     |
+          //  0 --- 3
+        }
+
+        // This function is called after all tests are through
+        virtual void TearDown() {
+
+            // Do some final stuff with the member data here...
+        }
+
+    // Member already defined in OpenMeshBase
+    //Mesh mesh_;
+};
+
 /*
  * ====================================================================
  * Define tests below
@@ -136,4 +179,80 @@ TEST_F(OpenMeshConvertTriangleMeshToPoly, VertexPropertyCheckDouble) {
 
 }
 
+/* Checks the converted mesh #faces and #vertices behaviour of adding
+ * vertices and faces to a trimesh after the conversion.
+ */
+TEST_F(OpenMeshConvertPolyMeshToTriangle, VertexFaceCheck) {
+
+  EXPECT_EQ(4u, mesh_.n_vertices() ) << "Wrong number of vertices in PolyMesh";
+  EXPECT_EQ(1u, mesh_.n_faces() )    << "Wrong number of faces in PolyMesh";
+
+  //convert PolyMesh to TriMesh
+  Mesh p = static_cast<Mesh>(mesh_);
+
+  // Check setup
+  EXPECT_EQ(4u, p.n_vertices() ) << "Wrong number of vertices in TriMesh";
+  EXPECT_EQ(2u, p.n_faces() )    << "Wrong number of faces in TriMesh";
+
+  //add vertex to original mesh
+  Mesh::VertexHandle vhand = mesh_.add_vertex(Mesh::Point(1, 1, 1));
+
+  EXPECT_EQ(5u, mesh_.n_vertices() ) << "Wrong number of vertices in PolyMesh";
+  EXPECT_EQ(4u, p.n_vertices() ) << "Wrong number of vertices in TriMesh";
+
+  Mesh::VertexIter it = mesh_.vertices_begin();
+  //add face to original mesh
+  mesh_.add_face(vhand,(*it),(*++it));
+
+  EXPECT_EQ(2u, mesh_.n_faces() ) << "Wrong number of faces in PolyMesh";
+  EXPECT_EQ(2u, p.n_faces() ) << "Wrong number of faces in TriMesh";
+}
+
+/* Creates a double property and checks if it works after conversion
+ */
+TEST_F(OpenMeshConvertPolyMeshToTriangle, VertexPropertyCheckDouble) {
+
+  // Add a double vertex property
+  OpenMesh::VPropHandleT<double> doubleHandle;
+
+  EXPECT_FALSE( mesh_.get_property_handle(doubleHandle,"doubleProp") );
+
+  mesh_.add_property(doubleHandle,"doubleProp");
+
+  // Fill property
+  double index = 0.0;
+
+  for ( Mesh::VertexIter v_it = mesh_.vertices_begin() ; v_it != mesh_.vertices_end(); ++v_it ) {
+    mesh_.property(doubleHandle,*v_it) = index;
+    index += 1.0;
+  }
+
+  EXPECT_TRUE(mesh_.get_property_handle(doubleHandle,"doubleProp"));
+
+  //convert triMesh to PolyMesh
+  Mesh p = static_cast<Mesh>(mesh_);
+
+  EXPECT_TRUE(p.get_property_handle(doubleHandle,"doubleProp"));
+
+  // Check if it is ok.
+  Mesh::VertexIter v_it = p.vertices_begin();
+  EXPECT_EQ( p.property(doubleHandle,*v_it) , 0.0 ) << "Invalid double value for vertex 0";
+  ++v_it;
+
+  EXPECT_EQ( p.property(doubleHandle,*v_it) , 1.0 ) << "Invalid double value for vertex 1";
+  ++v_it;
+
+  EXPECT_EQ( p.property(doubleHandle,*v_it) , 2.0 ) << "Invalid double value for vertex 2";
+  ++v_it;
+
+  EXPECT_EQ( p.property(doubleHandle,*v_it) , 3.0 ) << "Invalid double value for vertex 3";
+
+  //check if deletion in the original mesh affects the converted one.
+  mesh_.get_property_handle(doubleHandle,"doubleProp");
+  mesh_.remove_property(doubleHandle);
+  EXPECT_FALSE(mesh_.get_property_handle(doubleHandle,"doubleProp"));
+  EXPECT_TRUE(p.get_property_handle(doubleHandle,"doubleProp"));
+
+}
+
 }