Tests: Build testUVProcessChainHelper with WIN32_LEAN_AND_MEAN
diff --git a/Tests/CMakeLib/CMakeLists.txt b/Tests/CMakeLib/CMakeLists.txt
index 2c1d22b..4d43e08 100644
--- a/Tests/CMakeLib/CMakeLists.txt
+++ b/Tests/CMakeLib/CMakeLists.txt
@@ -53,6 +53,7 @@
 
 add_executable(testUVProcessChainHelper testUVProcessChainHelper.cxx)
 target_link_libraries(testUVProcessChainHelper CMakeLib)
+target_compile_definitions(testUVProcessChainHelper PRIVATE WIN32_LEAN_AND_MEAN)
 
 set(testRST_ARGS ${CMAKE_CURRENT_SOURCE_DIR})
 set(testUVProcessChain_ARGS $<TARGET_FILE:testUVProcessChainHelper>)