diff --git a/internal/cli/app.go b/internal/cli/app.go
index 8b20913..92b1234 100644
--- a/internal/cli/app.go
+++ b/internal/cli/app.go
@@ -104,7 +104,12 @@ func (cmd *cmdEnv) subCmdFrom(args []string) error {
 	// There should be no extra arguments.
 	extraArgs := fs.Args()
 	if len(extraArgs) != 0 {
-		return fmt.Errorf("unrecognized arguments: %+v", extraArgs)
+		cmd.exitVal = exitFailure
+		var s string
+		if len(extraArgs) > 1 {
+			s = "s"
+		}
+		return fmt.Errorf("unrecognized argument%s: %+v", s, extraArgs)
 	}
 
 	return nil
@@ -119,7 +124,7 @@ func (cmd *cmdEnv) subCmdUsage(subCmdName string) {
 	case "sync":
 		fmt.Print(syncUsage)
 	default:
-		fmt.Printf("%s %s: unrecognized subcommand %q\n", cmd.name, cmd.subCmdName, subCmdName)
+		fmt.Fprintf(os.Stderr, "%s %s: unrecognized subcommand %q\n", cmd.name, cmd.subCmdName, subCmdName)
 	}
 }
 
diff --git a/internal/cli/clone.go b/internal/cli/clone.go
index 0c1efd7..a513078 100644
--- a/internal/cli/clone.go
+++ b/internal/cli/clone.go
@@ -9,7 +9,7 @@ import (
 
 func subCmdClone(cmd *cmdEnv) {
 	if err := cmd.subCmdFrom(cmd.subCmdArgs); err != nil {
-		fmt.Fprintf(os.Stderr, "%s %s: %s", cmd.name, cmd.subCmdName, err)
+		fmt.Fprintf(os.Stderr, "%s %s: %s\n", cmd.name, cmd.subCmdName, err)
 		return
 	}
 	rs := cmd.repos()