diff --git a/cherry/testtiming/go.mod b/cherry/testtiming/go.mod
index bc02362..19d33eb 100644
--- a/cherry/testtiming/go.mod
+++ b/cherry/testtiming/go.mod
@@ -1,6 +1,6 @@
 module golang.org/x/scratch/cherry/testtiming
 
-go 1.23
+go 1.22
 
 require (
 	go.chromium.org/luci v0.0.0-20240716011143-b5eb7a221b66
diff --git a/cherry/wasmtest/testprog/x.go b/cherry/wasmtest/testprog/x.go
index d4f2355..a287c8c 100644
--- a/cherry/wasmtest/testprog/x.go
+++ b/cherry/wasmtest/testprog/x.go
@@ -1,3 +1,5 @@
+//go:build wasm
+
 package main
 
 import (
diff --git a/rsc/go.mod b/rsc/go.mod
deleted file mode 100644
index e69de29..0000000
--- a/rsc/go.mod
+++ /dev/null