diff --git a/assets/tests/ruby/rust_function_gets_called_from_script_with_multiple_params.rb b/assets/tests/ruby/rust_function_gets_called_from_script_with_multiple_params.rb
new file mode 100644
index 0000000..026ad0b
--- /dev/null
+++ b/assets/tests/ruby/rust_function_gets_called_from_script_with_multiple_params.rb
@@ -0,0 +1,3 @@
+def test_func
+	rust_func(5, "test")
+end
diff --git a/assets/tests/ruby/script_function_gets_called_from_rust_with_single_param.rb b/assets/tests/ruby/script_function_gets_called_from_rust_with_single_param.rb
new file mode 100644
index 0000000..a71146d
--- /dev/null
+++ b/assets/tests/ruby/script_function_gets_called_from_rust_with_single_param.rb
@@ -0,0 +1,7 @@
+STATE = {
+	"a_value" => nil
+}
+
+def test_func(a)
+	STATE["a_value"] = a
+end
diff --git a/src/runtimes/ruby.rs b/src/runtimes/ruby.rs
index b351463..f245579 100644
--- a/src/runtimes/ruby.rs
+++ b/src/runtimes/ruby.rs
@@ -4,6 +4,8 @@
 // TODO: consider dropping magnus
 // TODO: unwinding https://doc.rust-lang.org/nomicon/ffi.html#variadic-functions
 // TODO: maybe unify api and call non thread methods non_send
+// TODO: use ruby arena to rewind state
+
 use std::{
     collections::HashMap,
     ffi::{c_void, CString},