diff --git a/src/compile.rs b/src/compile.rs
index 943d2a5..e61a6fe 100644
--- a/src/compile.rs
+++ b/src/compile.rs
@@ -475,7 +475,6 @@ impl<'bc, 'gc> Compiler<'bc, 'gc> {
 
         for param in params.iter() {
             self.compile_expr(param)?;
-            todo!("no params yet")
         }
 
         self.push_instr(Instr::Load(offset), StackChange::Grow, call.span);
diff --git a/tests/functions.rs b/tests/functions.rs
index cc23c3a..d4c8a55 100644
--- a/tests/functions.rs
+++ b/tests/functions.rs
@@ -41,3 +41,47 @@ test2();
 print "correct3";
 "#
 );
+
+run_test!(
+    parameters,
+    r#"
+fn fancy_print(str) {
+    print str;
+}
+
+fancy_print("correct");
+"#
+);
+
+run_test!(
+    parameters_and_return,
+    r#"
+fn add(a, b) {
+    return a + b;
+}
+
+let added = add(1, 5);
+
+if added == 6 {
+    print "correct";
+} else {
+    print "FAILED";
+}
+"#
+);
+
+run_test!(
+    fib5,
+    r#"
+fn fib(n) {
+    if n < 2 {
+        return n;
+    } else {
+        return fib(n - 1) + fib(n - 2);
+    }
+}
+
+let fib5 = fib(5);
+print fib5;
+"#
+);