diff --git a/src/cmd/go/testdata/script/godebug_decoratemappings.txt b/src/cmd/go/testdata/script/godebug_decoratemappings_124.txt
similarity index 100%
rename from src/cmd/go/testdata/script/godebug_decoratemappings.txt
rename to src/cmd/go/testdata/script/godebug_decoratemappings_124.txt
diff --git a/test/decoratemappingszero.go b/src/cmd/go/testdata/script/godebug_decoratemappings_comment.txt
similarity index 54%
rename from test/decoratemappingszero.go
rename to src/cmd/go/testdata/script/godebug_decoratemappings_comment.txt
index 162e553405..7568812e37 100644
--- a/test/decoratemappingszero.go
+++ b/src/cmd/go/testdata/script/godebug_decoratemappings_comment.txt
@@ -1,14 +1,18 @@
-// run
+env GO111MODULE=on
 
-// Copyright 2025 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+[!GOOS:linux] skip
+[short] skip
 
-// Disable mapping annotations, which only exists for Linux.
+# Programs with //go:debug decoratemappings=0 should never see annotations.
+# This ensures that the runtime has not overridden the default.
+go run .
 
-//go:debug decoratemappings=0
-//go:build linux
+-- go.mod --
+go 1.25
+module m
 
+-- main.go --
+//go:debug decoratemappings=1
 package main
 
 import (