diff --git a/Subdivision_method_3/test/Subdivision_method_3/test_Subdivision_method_3.C b/Subdivision_method_3/test/Subdivision_method_3/test_Subdivision_method_3.cpp
similarity index 100%
rename from Subdivision_method_3/test/Subdivision_method_3/test_Subdivision_method_3.C
rename to Subdivision_method_3/test/Subdivision_method_3/test_Subdivision_method_3.cpp