diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index e33a61b..6f27502 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -4,11 +4,11 @@ find_package(GTest REQUIRED)
 add_executable(dtl_test 
   test/dtl_test.cpp
   test/dtl_test_common.cpp
-  test/intdifftest.cpp
-  test/objdifftest.cpp
-  test/patchtest.cpp
-  test/strdiff3test.cpp
-  test/strdifftest.cpp
+  test/int_diff_test.cpp
+  test/obj_diff_test.cpp
+  test/patch_test.cpp
+  test/str_diff3_test.cpp
+  test/str_diff_test.cpp
 )
 
 target_include_directories(dtl_test BEFORE PRIVATE
diff --git a/test/intdifftest.cpp b/test/int_diff_test.cpp
similarity index 100%
rename from test/intdifftest.cpp
rename to test/int_diff_test.cpp
diff --git a/test/objdifftest.cpp b/test/obj_diff_test.cpp
similarity index 100%
rename from test/objdifftest.cpp
rename to test/obj_diff_test.cpp
diff --git a/test/patchtest.cpp b/test/patch_test.cpp
similarity index 100%
rename from test/patchtest.cpp
rename to test/patch_test.cpp
diff --git a/test/strdiff3test.cpp b/test/str_diff3_test.cpp
similarity index 100%
rename from test/strdiff3test.cpp
rename to test/str_diff3_test.cpp
diff --git a/test/strdifftest.cpp b/test/str_diff_test.cpp
similarity index 100%
rename from test/strdifftest.cpp
rename to test/str_diff_test.cpp