diff --git a/justfile b/justfile
index 5779a64..0f09675 100644
--- a/justfile
+++ b/justfile
@@ -2,7 +2,8 @@ neville:
     julia -i "./neville-algo-ml.jl"
 
 test_langs:
+    # Test all languages and tools in this project
     cargo run
     uv run python ./main.py
-    julia ./neville-algo-ml.jl
+    julia ./main.jl
     nix flake info
diff --git a/main.jl b/main.jl
new file mode 100644
index 0000000..e33beec
--- /dev/null
+++ b/main.jl
@@ -0,0 +1 @@
+@info "Hello World!"