diff --git a/test/unit/ClientTest.js b/test/unit/ClientTest.js
new file mode 100644
index 0000000..dd1a1ea
--- /dev/null
+++ b/test/unit/ClientTest.js
@@ -0,0 +1,29 @@
+'use strict';
+
+/* eslint-env node, mocha */
+
+const { assert } = require('chai');
+
+const { Client, fsKeysStorage, tracesStorage } = require('../../index.js');
+
+describe('Client', () => {
+	describe('instantiating', () => {
+		it('should throw with no options provided', () => assert.throws(() => new Client()));
+		it('should throw with no url provided', () => assert.throws(() => new Client({})));
+		it('should throw with no partnerId provided', () => assert.throws(() => new Client({ url: 'https://myebics.com' })));
+		it('should throw with no userId provided', () => assert.throws(() => new Client({ url: 'https://myebics.com', partnerId: 'partnerId' })));
+		it('should throw with no hostId provided', () => assert.throws(() => new Client({ url: 'https://myebics.com', partnerId: 'partnerId', userId: 'userId' })));
+		it('should throw with no passphrase provided', () => assert.throws(() => new Client({
+			url: 'https://myebics.com', partnerId: 'partnerId', userId: 'userId', hostId: 'hostId',
+		})));
+		it('should throw with no keyStorage provided', () => assert.throws(() => new Client({
+			url: 'https://myebics.com', partnerId: 'partnerId', userId: 'userId', hostId: 'hostId', passphrase: 'test',
+		})));
+		it('should create an isntance without tracesStorage', () => assert.doesNotThrow(() => new Client({
+			url: 'https://myebics.com', partnerId: 'partnerId', userId: 'userId', hostId: 'hostId', passphrase: 'test', keyStorage: fsKeysStorage('./test.key'),
+		})));
+		it('should create an isntance with tracesStorage', () => assert.doesNotThrow(() => new Client({
+			url: 'https://myebics.com', partnerId: 'partnerId', userId: 'userId', hostId: 'hostId', passphrase: 'test', keyStorage: fsKeysStorage('./test.key'), tracesStorage: tracesStorage('./'),
+		})));
+	});
+});