diff --git a/src/protocol/tests/eval_calls.rs b/src/protocol/tests/eval_calls.rs
new file mode 100644
index 0000000000000000000000000000000000000000..46a5cfe377b50fb58dbd2ea76dbe31e8f631fb4d
--- /dev/null
+++ b/src/protocol/tests/eval_calls.rs
@@ -0,0 +1,31 @@
+use super::*;
+use crate::protocol::eval::*;
+
+#[test]
+fn test_function_call() {
+    Tester::new_single_source_expect_ok("with literal arg", "
+    func add_two(u32 value) -> u32 {
+        return value + 2;
+    }
+    func foo() -> u32 {
+        return add_two(5);
+    }
+    ").for_function("foo", |f| {
+        f.call(Some(Value::UInt32(7)));
+    });
+
+    println!("\n\n\n\n\n\n\n");
+
+    Tester::new_single_source_expect_ok("with variable arg", "
+    func add_two(u32 value) -> u32 {
+        value += 1;
+        return value + 1;
+    }
+    func foo() -> bool {
+        auto initial = 5;
+        auto result = add_two(initial);
+        return initial == 5 && result == 7;
+    }").for_function("foo", |f| {
+        f.call(Some(Value::Bool(true)));
+    });
+}
\ No newline at end of file