diff --git a/test/utils.spec.js b/test/utils.spec.js
new file mode 100644
index 0000000000..d573f06f53
--- /dev/null
+++ b/test/utils.spec.js
@@ -0,0 +1,78 @@
+/* eslint-env mocha */
+'use strict'
+
+const expect = require('chai').expect
+
+const utils = require('../src/utils')
+
+describe('utils', () => {
+  it('randomSeqno', () => {
+    const first = utils.randomSeqno()
+    const second = utils.randomSeqno()
+
+    expect(first).to.have.length(20)
+    expect(second).to.have.length(20)
+    expect(first).to.not.eql(second)
+  })
+
+  it('msgId', () => {
+    expect(utils.msgId('hello', Buffer.from('world'))).to.be.eql('hello776f726c64')
+  })
+
+  it('msgId should not generate same ID for two different buffers', () => {
+    const peerId = 'QmPNdSYk5Rfpo5euNqwtyizzmKXMNHdXeLjTQhcN4yfX22'
+    const msgId0 = utils.msgId(peerId, Buffer.from('15603533e990dfde', 'hex'))
+    const msgId1 = utils.msgId(peerId, Buffer.from('15603533e990dfe0', 'hex'))
+    expect(msgId0).to.not.eql(msgId1)
+  })
+
+  it('anyMatch', () => {
+    [
+      [[1, 2, 3], [4, 5, 6], false],
+      [[1, 2], [1, 2], true],
+      [[1, 2, 3], [4, 5, 1], true],
+      [[5, 6, 1], [1, 2, 3], true],
+      [[], [], false],
+      [[1], [2], false]
+    ].forEach((test) => {
+      expect(utils.anyMatch(new Set(test[0]), new Set(test[1])))
+        .to.eql(test[2])
+
+      expect(utils.anyMatch(new Set(test[0]), test[1]))
+        .to.eql(test[2])
+    })
+  })
+
+  it('ensureArray', () => {
+    expect(utils.ensureArray('hello')).to.be.eql(['hello'])
+    expect(utils.ensureArray([1, 2])).to.be.eql([1, 2])
+  })
+
+  it('converts an IN msg.from to b58', () => {
+    let binaryId = Buffer.from('1220e2187eb3e6c4fb3e7ff9ad4658610624a6315e0240fc6f37130eedb661e939cc', 'hex')
+    let stringId = 'QmdZEWgtaWAxBh93fELFT298La1rsZfhiC2pqwMVwy3jZM'
+    const m = [
+      { from: binaryId },
+      { from: stringId }
+    ]
+    const expected = [
+      { from: stringId },
+      { from: stringId }
+    ]
+    expect(utils.normalizeInRpcMessages(m)).to.deep.eql(expected)
+  })
+
+  it('converts an OUT msg.from to binary', () => {
+    let binaryId = Buffer.from('1220e2187eb3e6c4fb3e7ff9ad4658610624a6315e0240fc6f37130eedb661e939cc', 'hex')
+    let stringId = 'QmdZEWgtaWAxBh93fELFT298La1rsZfhiC2pqwMVwy3jZM'
+    const m = [
+      { from: binaryId },
+      { from: stringId }
+    ]
+    const expected = [
+      { from: binaryId },
+      { from: binaryId }
+    ]
+    expect(utils.normalizeOutRpcMessages(m)).to.deep.eql(expected)
+  })
+})