diff --git a/README.md b/README.md
index f7f72de..dbda6fc 100644
--- a/README.md
+++ b/README.md
@@ -74,7 +74,7 @@ Please make each contribution reasonably small. If you would like to make a big
 ## Build Instructions
 
 ### System Requirements
-It is recommended to install 16GB RAM in your build system.
+It is recommended to install at least 16GB RAM in your build system.
 
 ### Build System
 * CMake 3.15 or newer is required. [Download](https://cmake.org/download/) and install proper one if the cmake is older than 3.15.
@@ -159,6 +159,7 @@ cmake --build builds/Release32
 * For RedHat 7.x, please use cmake3(>= 3.15) instead of cmake.
 * For debug build, use `-DCMAKE_BUILD_TYPE=Debug -DLLVM_PARALLEL_LINK_JOBS=2` (Linking a debug build of llvm is very memory intensive, so we use only two parallel jobs).
 * To enable Wayland support, use `-DBUILD_WAYLAND_SUPPORT=ON`.
+* To enable tests, use `-DXGL_BUILD_TESTS=ON`.
 
 ## Installation Instructions
 ### Install Vulkan SDK