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