diff --git a/Convex_hull_3/test/Convex_hull_3/degeneracy_test.C b/Convex_hull_3/test/Convex_hull_3/degeneracy_test.cpp
similarity index 100%
rename from Convex_hull_3/test/Convex_hull_3/degeneracy_test.C
rename to Convex_hull_3/test/Convex_hull_3/degeneracy_test.cpp
diff --git a/Convex_hull_3/test/Convex_hull_3/quickhull_degenerate_test_3.C b/Convex_hull_3/test/Convex_hull_3/quickhull_degenerate_test_3.cpp
similarity index 100%
rename from Convex_hull_3/test/Convex_hull_3/quickhull_degenerate_test_3.C
rename to Convex_hull_3/test/Convex_hull_3/quickhull_degenerate_test_3.cpp
diff --git a/Convex_hull_3/test/Convex_hull_3/quickhull_test_3.C b/Convex_hull_3/test/Convex_hull_3/quickhull_test_3.cpp
similarity index 100%
rename from Convex_hull_3/test/Convex_hull_3/quickhull_test_3.C
rename to Convex_hull_3/test/Convex_hull_3/quickhull_test_3.cpp