WIP: cheap scrypt in tests

internal/vault/vault_test.go

@@ -3,6 +3,7 @@ package vault_test
 import (
 	"bytes"
 	"errors"
+	"os"
 	"path/filepath"
 	"slices"
 	"testing"
@@ -28,6 +29,14 @@ const (
 	testPassphrase = "test-passphrase"
 )
 
+// TestMain makes passphrase encryption in the tests cheap; see
+// secret.ScryptWorkFactor.
+func TestMain(m *testing.M) {
+	secret.ScryptWorkFactor = 1
+
+	os.Exit(m.Run())
+}
+
 // testMnemonicBuffer returns testMnemonic in a locked buffer that is
 // destroyed when the test ends.
 func testMnemonicBuffer(t *testing.T) *memguard.LockedBuffer {