diff --git a/README.md b/README.md
index be9cb8e815..8e3eb2a8cd 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ A few basic steps are needed to get set up:
    6. Navigate to the working directory.
    7. If you haven't already, clone the repository with submodules: `git clone --recursive https://github.com/sigp/lighthouse`.
 		Alternatively, run `git submodule init` in a repository which was cloned without submodules.
-   8. Run the test by using command `cargo test --all`. By running, it will pass all the required test cases.
+   8. Run the test by using command `cargo test --all --release`. By running, it will pass all the required test cases.
         If you are doing it for the first time, then you can grab a coffee in the meantime. Usually, it takes time
         to build, compile and pass all test cases. If there is no error then it means everything is working properly
         and it's time to get your hands dirty.