diff --git a/filesystem.h b/filesystem.h
index 250ad0f..c706fce 100644
--- a/filesystem.h
+++ b/filesystem.h
@@ -1669,7 +1669,7 @@ inline u8arguments::u8arguments(int& argc, char**& argv)
     p = ::CommandLineToArgvW(::GetCommandLineW(), &argc);
     _args.reserve(argc);
     _argp.reserve(argc);
-    for (size_t i = 0; i < argc; ++i) {
+    for (size_t i = 0; i < static_cast<size_t>(argc); ++i) {
         _args.push_back(detail::toUtf8(std::wstring(p[i])));
         _argp.push_back((char*)_args[i].data());
     }
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 77b8aa4..b3a0c6f 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,5 +1,8 @@
 
 add_executable(filesystem_test filesystem_test.cpp ../filesystem.h catch.hpp)
+if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
+    target_compile_definitions(filesystem_test PRIVATE _CRT_SECURE_NO_WARNINGS)
+endif()
 if(CMAKE_GENERATOR STREQUAL Xcode)
     add_executable(filesystem_test_cov filesystem_test.cpp ../filesystem.h catch.hpp)
     target_compile_options(filesystem_test_cov PRIVATE "$<$<CONFIG:DEBUG>:--coverage>")
@@ -26,5 +29,5 @@ if(CMAKE_CXX_COMPILER_ID MATCHES MSVC AND (CMAKE_CXX_COMPILER_VERSION VERSION_EQ
     add_executable(std_filesystem_test filesystem_test.cpp ../filesystem.h catch.hpp)
     set_property(TARGET std_filesystem_test PROPERTY CXX_STANDARD 17)
 	target_compile_options(std_filesystem_test PRIVATE "/Zc:__cplusplus")
-    target_compile_definitions(std_filesystem_test PRIVATE USE_STD_FS)
+    target_compile_definitions(std_filesystem_test PRIVATE USE_STD_FS _CRT_SECURE_NO_WARNINGS)
 endif()