diff --git a/test/utils.test.js b/test/utils.test.js
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+++ b/test/utils.test.js
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+/*
+Copyright 2020 Yarmo Mackenbach
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+const chai = require('chai')
+const expect = chai.expect
+
+const doipjs = require('../src')
+
+describe('utils.generateClaim', () => {
+  it('should be a function (2 arguments)', () => {
+    expect(doipjs.utils.generateClaim).to.be.a('function')
+    expect(doipjs.utils.generateClaim).to.have.length(2)
+  })
+  it('should generate a correct "uri" claim', () => {
+    expect(doipjs.utils.generateClaim('123456789', 'uri')).to.equal('openpgp4fpr:123456789')
+  })
+  it('should generate a correct "message" claim', () => {
+    expect(doipjs.utils.generateClaim('123456789', 'message')).to.equal('[Verifying my OpenPGP key: openpgp4fpr:123456789]')
+  })
+  it('should generate a correct "fingerprint" claim', () => {
+    expect(doipjs.utils.generateClaim('123456789', 'fingerprint')).to.equal('123456789')
+  })
+})