diff --git a/src/cmd/go/internal/vcweb/script.go b/src/cmd/go/internal/vcweb/script.go
index 6e8f158913..f58a0ac392 100644
--- a/src/cmd/go/internal/vcweb/script.go
+++ b/src/cmd/go/internal/vcweb/script.go
@@ -33,7 +33,7 @@ func newScriptEngine() *script.Engine {
 	conds := script.DefaultConds()
 
 	interrupt := func(cmd *exec.Cmd) error { return cmd.Process.Signal(os.Interrupt) }
-	gracePeriod := 1 * time.Second // arbitrary
+	gracePeriod := 30 * time.Second // arbitrary
 
 	cmds := script.DefaultCmds()
 	cmds["at"] = scriptAt()