diff --git a/corpus/functions.txt b/corpus/functions.txt
index a946c1d48..42acf4fbf 100644
--- a/corpus/functions.txt
+++ b/corpus/functions.txt
@@ -16,7 +16,7 @@ fn replace(
   each pattern: String,
   with replacement: String
 ) {
-  string.replace(in: in, each: each, with: with)
+  string.replace(in: string, each: pattern, with: replacement)
 }
 
 ---