diff --git a/src/components/Pages/ManageWiki/Cards/Logo.vue b/src/components/Pages/ManageWiki/Cards/Logo.vue
index 839ea248..3f287278 100644
--- a/src/components/Pages/ManageWiki/Cards/Logo.vue
+++ b/src/components/Pages/ManageWiki/Cards/Logo.vue
@@ -3,10 +3,10 @@
     <v-card-title>Set Logo</v-card-title>
     <v-card-text>
       <v-file-input
-        hint="Upload a square PNG logo that is at least 135x135 pixels."
+        hint="Upload a square SVG (recommended) or PNG of at least 135x135 pixels. Maximum file size: 2 MiB. SVGs must be self-contained and are sanitised for safety."
         label="Logo"
         prepend-icon="mdi-watermark"
-        accept="image/png"
+        accept="image/png,image/svg+xml,.png,.svg"
         :show-size="true"
         :persistent-hint="true"
         @change="onLogoFileChanged"
@@ -50,9 +50,9 @@ export default {
           alert('Upload success!')
         })
         .catch(err => {
-          console.log(err.response)
-          alert('Something went wrong.')
-          this.$router.go()
+          console.error(err)
+          const errors = err.response && err.response.data && err.response.data.errors
+          alert(errors && errors.logo ? errors.logo.join('\n') : 'The logo could not be uploaded. Please try again.')
         })
     },
   },
diff --git a/tests/unit/logo.spec.js b/tests/unit/logo.spec.js
new file mode 100644
index 00000000..83e8fa36
--- /dev/null
+++ b/tests/unit/logo.spec.js
@@ -0,0 +1,68 @@
+import { shallowMount } from '@vue/test-utils'
+import Vue from 'vue'
+import Vuetify from 'vuetify'
+import Logo from '@/components/Pages/ManageWiki/Cards/Logo.vue'
+
+Vue.use(Vuetify)
+
+describe('Logo uploads', () => {
+  let wrapper
+  let dispatch
+
+  beforeEach(() => {
+    dispatch = jest.fn().mockResolvedValue()
+    jest.spyOn(window, 'alert').mockImplementation(() => {})
+    jest.spyOn(console, 'error').mockImplementation(() => {})
+    wrapper = shallowMount(Logo, {
+      propsData: { wikiId: 1 },
+      mocks: {
+        $store: {
+          dispatch,
+          state: { wikis: { currentWikiSettings: { wgLogo: 'logo.png' } } },
+        },
+      },
+    })
+  })
+
+  afterEach(() => {
+    wrapper.destroy()
+    jest.restoreAllMocks()
+  })
+
+  it('accepts SVG and PNG and explains the recommended format and limits', () => {
+    const input = wrapper.findComponent({ name: 'v-file-input' })
+    expect(input.attributes('accept')).toBe('image/png,image/svg+xml,.png,.svg')
+    expect(input.attributes('hint')).toContain('SVG (recommended)')
+    expect(input.attributes('hint')).toContain('135x135')
+    expect(input.attributes('hint')).toContain('2 MiB')
+  })
+
+  it('uploads the selected SVG without changing its filename or contents', async () => {
+    const file = new File(['<svg/>'], 'logo.svg', { type: 'image/svg+xml' })
+    wrapper.vm.onLogoFileChanged(file)
+    wrapper.vm.doLogoUpload()
+    await Promise.resolve()
+    expect(dispatch).toHaveBeenCalledWith('updateLogo', { wikiId: 1, file, fileName: 'logo.svg' })
+    expect(window.alert).toHaveBeenCalledWith('Upload success!')
+  })
+
+  it('shows API validation errors without discarding the selected file', async () => {
+    const file = new File(['invalid'], 'logo.svg', { type: 'image/svg+xml' })
+    dispatch.mockRejectedValue({ response: { data: { errors: { logo: ['Invalid SVG logo.'] } } } })
+    wrapper.vm.onLogoFileChanged(file)
+    wrapper.vm.doLogoUpload()
+    await Promise.resolve()
+    await Promise.resolve()
+    expect(window.alert).toHaveBeenCalledWith('Invalid SVG logo.')
+    expect(wrapper.vm.selectedLogoFile).toBe(file)
+  })
+
+  it('shows an error when the network request fails', async () => {
+    dispatch.mockRejectedValue(new Error('Network error'))
+    wrapper.vm.onLogoFileChanged(new File(['data'], 'logo.png'))
+    wrapper.vm.doLogoUpload()
+    await Promise.resolve()
+    await Promise.resolve()
+    expect(window.alert).toHaveBeenCalledWith('The logo could not be uploaded. Please try again.')
+  })
+})