--- a/tests/src/util/playgrounds/index.ts
+++ b/tests/src/util/playgrounds/index.ts
@@ -1,3 +1,6 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
 import {IKeyringPair} from '@polkadot/types/types';
 import {UniqueHelper} from './unique';
 import config from '../../config';
--- a/tests/src/util/playgrounds/unique.ts
+++ b/tests/src/util/playgrounds/unique.ts
@@ -1,3 +1,6 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
 /* eslint-disable @typescript-eslint/no-var-requires */
 /* eslint-disable function-call-argument-newline */
 /* eslint-disable no-prototype-builtins */