diff --git a/filetests/parser/call.cton b/filetests/parser/call.cton
index 7626524110..67472f7efc 100644
--- a/filetests/parser/call.cton
+++ b/filetests/parser/call.cton
@@ -71,10 +71,10 @@ ebb0(v0: i64):
 
 ; Special purpose function arguments
 function special1(i32 sret, i32 fp, i32 csr, i32 link) -> i32 link, i32 fp, i32 csr, i32 sret {
-ebb0(v1: i32, v2: i32, v3: i32):
+ebb0(v1: i32, v2: i32, v3: i32, v4: i32):
     return v4, v2, v3, v1
 }
-; check: function special1(i32 sret, i32 fp, i32 link) -> i32 link, i32 fp, i32 sret {
-; check: ebb0($v1: i32, $v2: i32, $v3: i32):
-; check:     return $v3, $v2, $v1
+; check: function special1(i32 sret, i32 fp, i32 csr, i32 link) -> i32 link, i32 fp, i32 csr, i32 sret {
+; check: ebb0($v1: i32, $v2: i32, $v3: i32, $v4: i32):
+; check:     return $v4, $v2, $v3, $v1
 ; check: }