diff --git a/schala-lang/language/src/parsing.rs b/schala-lang/language/src/parsing.rs
index 04ee0b1..d2eb8da 100644
--- a/schala-lang/language/src/parsing.rs
+++ b/schala-lang/language/src/parsing.rs
@@ -1228,7 +1228,7 @@ mod parse_tests {
   }
 
   macro_rules! inv {
-    ($expr_type:expr) => { Meta::new(InvocationArgument::Positional(ex!($expr_type))) }
+    ($expr_type:expr) => { Meta::new(InvocationArgument::Positional($expr_type)) }
   }
 
   macro_rules! binexp {
@@ -1363,7 +1363,7 @@ mod parse_tests {
     parse_test!("oi()", AST(vec![exst!(Call { f: bx!(ex!(m val!("oi"))), arguments: vec![] })]));
     parse_test!("oi(a, 2 + 2)", AST(vec![exst!(Call
     { f: bx!(ex!(m val!("oi"))),
-      arguments: vec![inv!(val!("a")).into(), inv!(binexp!("+", NatLiteral(2), NatLiteral(2))).into()]
+      arguments: vec![inv!(ex!(val!("a"))).into(), inv!(ex!(binexp!("+", NatLiteral(2), NatLiteral(2)))).into()]
     })]));
     parse_error!("a(b,,c)");
 
@@ -1626,7 +1626,7 @@ fn a(x) {
           type_anno: None,
           body: vec![exst!(s "y")] }
         )),
-        arguments: vec![inv!(NatLiteral(1)).into()] })]));
+        arguments: vec![inv!(ex!(NatLiteral(1))).into()] })]));
 
     parse_test_wrap_ast! {
       r#"\(x: Int): String { "q" }"#,
@@ -1668,7 +1668,7 @@ fn a(x) {
         exst! {
           Call {
             f: bx!(ex!(m Call { f: bx!(ex!(m val!("wahoo"))), arguments: vec![] })),
-            arguments: vec![inv!(NatLiteral(3)).into()],
+            arguments: vec![inv!(ex!(NatLiteral(3))).into()],
           }
         }
       ])