test-runner-node This package allows you to execute tests and output the results to the terminal. To define the actual tests, you'll need to use the gren-lang/test package. Quick start A minimal test program will have the following in a Main.gren file: module Main exposing (main) import Test exposing (describe, test) import Test.Runner.Node exposing (Program, run) main : Program main = run <| describe "All tests" [ test "Failing test" <| \_ -> Expect.equal True False ]