diff --git a/.gitignore b/.gitignore
index 7b6c6ddfc6e..9508e85339b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1016,6 +1016,21 @@ Polytope_distance_d/doc_ps
 Polytope_distance_d/test/Polytope_distance_d/CMakeLists.txt
 Polytope_distance_d/test/Polytope_distance_d/cgal_test_with_cmake
 Polytope_distance_d/test/Polytope_distance_d/test_Polytope_distance_d_d
+Principal_component_analysis/test/Principal_component_analysis/CMakeLists.txt
+Principal_component_analysis/test/Principal_component_analysis/bounding_box
+Principal_component_analysis/test/Principal_component_analysis/cgal_test_with_cmake
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_circles_2
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_cuboids_3
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_points_2
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_points_3
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_rectangles_2
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_segments_2
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_segments_3
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_spheres_3
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_tetrahedra_3
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_triangles_2
+Principal_component_analysis/test/Principal_component_analysis/linear_least_squares_fitting_triangles_3
+Principal_component_analysis/test/Principal_component_analysis/test_barycenter
 QP_solver/documentation/Degeneracies.aux
 QP_solver/documentation/Degeneracies.log
 QP_solver/documentation/Degeneracies.pdf
diff --git a/Principal_component_analysis/test/Principal_component_analysis/barycenter.cpp b/Principal_component_analysis/test/Principal_component_analysis/test_barycenter.cpp
similarity index 100%
rename from Principal_component_analysis/test/Principal_component_analysis/barycenter.cpp
rename to Principal_component_analysis/test/Principal_component_analysis/test_barycenter.cpp