diff --git a/src/components/Logs.vue b/src/components/Logs.vue
index 8f0e32d..20d4ee1 100644
--- a/src/components/Logs.vue
+++ b/src/components/Logs.vue
@@ -37,11 +37,13 @@ export default {
       if (msg.row !== null && msg.row !== undefined) {
         result += `Error in row ${msg.row}. `
       }
+
       result += msg.message
+      if (!(/(\.|!|\?)$/.test(result))) {
+        result += '.'
+      }
+
       if (msg.hint) {
-        if (!(result[0] in ['.', '!', '?'])) {
-          result += '.'
-        }
         result += ` ${msg.hint}`
       }
       return result
diff --git a/tests/unit/components/Logs.spec.js b/tests/unit/components/Logs.spec.js
new file mode 100644
index 0000000..99264d8
--- /dev/null
+++ b/tests/unit/components/Logs.spec.js
@@ -0,0 +1,82 @@
+import { expect } from 'chai'
+import { shallowMount } from '@vue/test-utils'
+import Logs from '@/components/Logs.vue'
+
+let place
+describe('Logs.vue', () => {
+  beforeEach(() => {
+    place = document.createElement('div')
+    document.body.appendChild(place)
+  })
+  afterEach(() => {
+    place.remove()
+  })
+
+  it('Scrolled to bottom on mounted', async () => {
+    const messages = [
+      { type: 'error', message: 'msg 1' },
+      { type: 'error', message: 'msg 2' },
+      { type: 'error', message: 'msg 3' },
+      { type: 'error', message: 'msg 4' }
+    ]
+
+    const containerHeight = 160
+    const borderWidth = 1
+    const viewHeight = containerHeight - 2 * borderWidth
+    const wrapper = shallowMount(Logs, {
+      attachTo: place,
+      propsData: { messages, style: `height: ${containerHeight}px` }
+    })
+
+    await wrapper.vm.$nextTick()
+    const height = wrapper.find('.logs-container').element.scrollHeight
+    expect(wrapper.find('.logs-container').element.scrollTop)
+      .to.equal(height - viewHeight)
+    wrapper.destroy()
+  })
+
+  it('Scrolled to bottom when a message added', async () => {
+    const messages = [
+      { type: 'error', message: 'msg 1' },
+      { type: 'error', message: 'msg 2' },
+      { type: 'error', message: 'msg 3' },
+      { type: 'error', message: 'msg 4' }
+    ]
+
+    const containerHeight = 160
+    const borderWidth = 1
+    const viewHeight = containerHeight - 2 * borderWidth
+    const wrapper = shallowMount(Logs, {
+      attachTo: place,
+      propsData: { messages, style: `height: ${containerHeight}px` }
+    })
+
+    await wrapper.vm.$nextTick()
+    messages.push({ type: 'error', message: 'msg 5' })
+
+    await wrapper.vm.$nextTick()
+    const height = wrapper.find('.logs-container').element.scrollHeight
+    expect(wrapper.find('.logs-container').element.scrollTop)
+      .to.equal(height - viewHeight)
+    wrapper.destroy()
+  })
+
+  it('Serializes messages', async () => {
+    const messages = [
+      { type: 'error', message: 'msg 1.', row: 0, hint: 'Try again later.' },
+      { type: 'error', message: 'msg 2!', row: 2, hint: undefined },
+      { type: 'error', message: 'msg 3?', hint: 'Be happy!' },
+      { type: 'error', message: 'msg 4' }
+    ]
+
+    const wrapper = shallowMount(Logs, {
+      propsData: { messages }
+    })
+
+    const logs = wrapper.findAll('.msg')
+    expect(logs.at(0).text()).to.equal('Error in row 0. msg 1. Try again later.')
+    expect(logs.at(1).text()).to.equal('Error in row 2. msg 2!')
+    expect(logs.at(2).text()).to.equal('msg 3? Be happy!')
+    expect(logs.at(3).text()).to.equal('msg 4.')
+  })
+})