diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index b1b41abd4..8abb21e4b 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,6 +1,8 @@
 if(WIN32)
     add_compile_options("$<$<CXX_COMPILER_ID:MSVC>:/source-charset:utf-8>")
     add_compile_options("$<$<C_COMPILER_ID:MSVC>:/source-charset:utf-8>")
+    add_compile_options("$<$<CXX_COMPILER_ID:MSVC>:/execution-charset:utf-8>")
+    add_compile_options("$<$<C_COMPILER_ID:MSVC>:/execution-charset:utf-8>")
 endif()
 
 function(llama_test target)