diff --git a/vcs-test/vcweb/deathclock_go121_test.go b/vcs-test/vcweb/deathclock_go121_test.go
new file mode 100644
index 00000000..5ab45c86
--- /dev/null
+++ b/vcs-test/vcweb/deathclock_go121_test.go
@@ -0,0 +1,13 @@
+// Copyright 2022 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.
+
+//go:build go1.22
+
+package main_test
+
+func init() {
+	// When development begins for the Go 1.22 cycle, the supported Go
+	// releases will be Go 1.20 and 1.21.
+	go119Unsupported = true
+}
diff --git a/vcs-test/vcweb/deathclock_test.go b/vcs-test/vcweb/deathclock_test.go
new file mode 100644
index 00000000..ab833c19
--- /dev/null
+++ b/vcs-test/vcweb/deathclock_test.go
@@ -0,0 +1,27 @@
+// Copyright 2022 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.
+
+package main_test
+
+import "testing"
+
+var go119Unsupported = false
+
+var turndownMsg = `
+Since Go 1.19 is not longer supported, vcs-test.golang.org is no
+longer needed for testing any release branch and should be turned
+down, and x/build/vcs-test/... should be deleted.
+(See https://go.dev/issue/27494.)`
+
+func TestTurnDownVCSTest(t *testing.T) {
+	if !go119Unsupported {
+		return
+	}
+
+	if testing.Short() {
+		t.Log(turndownMsg)
+	} else {
+		t.Fatal(turndownMsg)
+	}
+}