diff --git a/js/src/components/Comment/CommentTree.vue b/js/src/components/Comment/CommentTree.vue
index e3639bf36..592e23cd9 100644
--- a/js/src/components/Comment/CommentTree.vue
+++ b/js/src/components/Comment/CommentTree.vue
@@ -26,9 +26,12 @@
             </p>
           </div>
           <div class="send-comment">
-            <b-button native-type="submit" type="is-primary">{{
-              $t("Post a comment")
-            }}</b-button>
+            <b-button
+              native-type="submit"
+              type="is-primary"
+              class="comment-button-submit"
+              >{{ $t("Post a comment") }}</b-button
+            >
           </div>
         </div>
       </article>
@@ -37,6 +40,9 @@
       $t("The organiser has chosen to close comments.")
     }}</b-notification>
     <transition name="comment-empty-list" mode="out-in">
+      <p v-if="$apollo.queries.comments.loading" class="loading">
+        {{ $t("Loading…") }}
+      </p>
       <transition-group
         name="comment-list"
         v-if="comments.length"
@@ -326,7 +332,7 @@ export default class CommentTree extends Vue {
   }
 
   get isAbleToComment(): boolean {
-    if (this.currentActor.id) {
+    if (this.currentActor && this.currentActor.id) {
       return this.areCommentsClosed || this.isEventOrganiser;
     }
     return false;
diff --git a/js/tests/unit/specs/components/Comment/CommentTree.spec.ts b/js/tests/unit/specs/components/Comment/CommentTree.spec.ts
new file mode 100644
index 000000000..950ea51b6
--- /dev/null
+++ b/js/tests/unit/specs/components/Comment/CommentTree.spec.ts
@@ -0,0 +1,157 @@
+import { config, createLocalVue, shallowMount, Wrapper } from "@vue/test-utils";
+import CommentTree from "@/components/Comment/CommentTree.vue";
+import Buefy from "buefy";
+import { InMemoryCache } from "apollo-cache-inmemory";
+import {
+  createMockClient,
+  MockApolloClient,
+  RequestHandler,
+} from "mock-apollo-client";
+import buildCurrentUserResolver from "@/apollo/user";
+import VueApollo from "vue-apollo";
+import { COMMENTS_THREADS, CREATE_COMMENT_FROM_EVENT } from "@/graphql/comment";
+import { CommentModeration } from "@/types/enums";
+import { IEvent } from "@/types/event.model";
+import {
+  eventCommentThreadsMock,
+  newCommentForEventMock,
+  newCommentForEventResponse,
+} from "../../mocks/event";
+
+const localVue = createLocalVue();
+localVue.use(Buefy);
+localVue.use(VueApollo);
+config.mocks.$t = (key: string): string => key;
+
+const eventData = {
+  id: "1",
+  uuid: "e37910ea-fd5a-4756-7634-00971f3f4107",
+  options: {
+    commentModeration: CommentModeration.ALLOW_ALL,
+  },
+};
+describe("CommentTree", () => {
+  let wrapper: Wrapper<Vue>;
+  let mockClient: MockApolloClient;
+  let apolloProvider;
+  let requestHandlers: Record<string, RequestHandler>;
+
+  const generateWrapper = (handlers = {}, baseData = {}) => {
+    const cache = new InMemoryCache({ addTypename: false });
+
+    mockClient = createMockClient({
+      cache,
+      resolvers: buildCurrentUserResolver(cache),
+    });
+
+    requestHandlers = {
+      eventCommentThreadsQueryHandler: jest
+        .fn()
+        .mockResolvedValue(eventCommentThreadsMock),
+      createCommentForEventMutationHandler: jest
+        .fn()
+        .mockResolvedValue(newCommentForEventResponse),
+      ...handlers,
+    };
+
+    mockClient.setRequestHandler(
+      COMMENTS_THREADS,
+      requestHandlers.eventCommentThreadsQueryHandler
+    );
+    mockClient.setRequestHandler(
+      CREATE_COMMENT_FROM_EVENT,
+      requestHandlers.createCommentForEventMutationHandler
+    );
+
+    apolloProvider = new VueApollo({
+      defaultClient: mockClient,
+    });
+
+    wrapper = shallowMount(CommentTree, {
+      localVue,
+      apolloProvider,
+      propsData: {
+        event: { ...eventData },
+      },
+      stubs: ["editor"],
+      data() {
+        return {
+          currentActor: {
+            id: "76",
+          },
+          ...baseData,
+        };
+      },
+    });
+  };
+
+  it("renders a comment tree", async () => {
+    generateWrapper();
+
+    expect(wrapper.findComponent({ name: "b-notification" }).text()).toBe(
+      "The organiser has chosen to close comments."
+    );
+    expect(wrapper.find(".loading").text()).toBe("Loading…");
+    expect(wrapper.html()).toMatchSnapshot();
+  });
+
+  it("renders a comment tree", async () => {
+    generateWrapper();
+
+    await wrapper.vm.$nextTick();
+    await wrapper.vm.$nextTick(); // because of the <transition>
+
+    expect(wrapper.exists()).toBe(true);
+    expect(requestHandlers.eventCommentThreadsQueryHandler).toHaveBeenCalled();
+    expect(wrapper.vm.$apollo.queries.comments).toBeTruthy();
+    expect(wrapper.find(".loading").exists()).toBe(false);
+    expect(wrapper.findAll(".comment-list .root-comment").length).toBe(2);
+    expect(wrapper.html()).toMatchSnapshot();
+  });
+
+  it("renders the form if we can comment", async () => {
+    generateWrapper(
+      {},
+      {
+        newComment: {
+          text: newCommentForEventMock.text,
+        },
+      }
+    );
+
+    wrapper.setData({
+      currentActor: {
+        id: "67",
+      },
+    });
+
+    await wrapper.vm.$nextTick();
+    await wrapper.vm.$nextTick(); // because of the <transition>
+
+    expect(wrapper.find("form.new-comment").isVisible()).toBe(true);
+    expect(wrapper.findAll(".comment-list .root-comment").length).toBe(2);
+
+    wrapper.find("form.new-comment").trigger("submit");
+
+    await wrapper.vm.$nextTick();
+    expect(
+      requestHandlers.createCommentForEventMutationHandler
+    ).toHaveBeenCalledWith({
+      ...newCommentForEventMock,
+    });
+
+    if (mockClient) {
+      const cachedData = mockClient.cache.readQuery<{ event: IEvent }>({
+        query: COMMENTS_THREADS,
+        variables: {
+          eventUUID: eventData.uuid,
+        },
+      });
+      if (cachedData) {
+        const { event } = cachedData;
+
+        expect(event.comments).toHaveLength(3);
+      }
+    }
+  });
+});
diff --git a/js/tests/unit/specs/components/Comment/__snapshots__/CommentTree.spec.ts.snap b/js/tests/unit/specs/components/Comment/__snapshots__/CommentTree.spec.ts.snap
new file mode 100644
index 000000000..4ea79739c
--- /dev/null
+++ b/js/tests/unit/specs/components/Comment/__snapshots__/CommentTree.spec.ts.snap
@@ -0,0 +1,26 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`CommentTree renders a comment tree 1`] = `
+<div>
+  <b-notification-stub active="true" duration="2000" animation="fade">The organiser has chosen to close comments.</b-notification-stub>
+  <transition-stub name="comment-empty-list" mode="out-in">
+    <p class="loading">
+      Loading…
+    </p>
+    <!---->
+  </transition-stub>
+</div>
+`;
+
+exports[`CommentTree renders a comment tree 2`] = `
+<div>
+  <b-notification-stub active="true" duration="2000" animation="fade">The organiser has chosen to close comments.</b-notification-stub>
+  <transition-stub name="comment-empty-list" mode="out-in">
+    <!---->
+    <transition-group-stub tag="ul" name="comment-list" class="comment-list">
+      <comment-stub comment="[object Object]" event="[object Object]" class="root-comment"></comment-stub>
+      <comment-stub comment="[object Object]" event="[object Object]" class="root-comment"></comment-stub>
+    </transition-group-stub>
+  </transition-stub>
+</div>
+`;
diff --git a/js/tests/unit/specs/components/Report/ReportCard.spec.ts b/js/tests/unit/specs/components/Report/ReportCard.spec.ts
new file mode 100644
index 000000000..4fde36067
--- /dev/null
+++ b/js/tests/unit/specs/components/Report/ReportCard.spec.ts
@@ -0,0 +1,62 @@
+import { config, createLocalVue, mount } from "@vue/test-utils";
+import ReportCard from "@/components/Report/ReportCard.vue";
+import Buefy from "buefy";
+import { ActorType } from "@/types/enums";
+
+const localVue = createLocalVue();
+localVue.use(Buefy);
+config.mocks.$t = (key: string): string => key;
+
+const reportData = {
+  id: "1",
+  content: "My content",
+  insertedAt: "2020-12-02T09:01:20.873Z",
+  reporter: {
+    preferredUsername: "author",
+    domain: null,
+    name: "Reporter of Things",
+    type: ActorType.PERSON,
+  },
+  reported: {
+    preferredUsername: "my-awesome-group",
+    domain: null,
+    name: "My Awesome Group",
+  },
+};
+
+const generateWrapper = (customReportData: Record<string, unknown> = {}) => {
+  return mount(ReportCard, {
+    localVue,
+    propsData: {
+      report: { ...reportData, ...customReportData },
+    },
+  });
+};
+
+describe("ReportCard", () => {
+  it("renders report card with basic informations", () => {
+    const wrapper = generateWrapper();
+
+    expect(wrapper.find(".media-content .title").text()).toBe(
+      reportData.reported.name
+    );
+
+    expect(wrapper.find(".media-content .subtitle").text()).toBe(
+      `@${reportData.reported.preferredUsername}`
+    );
+
+    expect(wrapper.find(".is-one-quarter-desktop span").text()).toBe(
+      `Reported by {reporter}`
+    );
+  });
+
+  it("renders report card with with a remote reporter", () => {
+    const wrapper = generateWrapper({
+      reporter: { domain: "somewhere.else", type: ActorType.APPLICATION },
+    });
+
+    expect(wrapper.find(".is-one-quarter-desktop span").text()).toBe(
+      "Reported by someone on {domain}"
+    );
+  });
+});
diff --git a/js/tests/unit/specs/components/Report/ReportModal.spec.ts b/js/tests/unit/specs/components/Report/ReportModal.spec.ts
new file mode 100644
index 000000000..0f3944b80
--- /dev/null
+++ b/js/tests/unit/specs/components/Report/ReportModal.spec.ts
@@ -0,0 +1,130 @@
+import { config, createLocalVue, mount } from "@vue/test-utils";
+import ReportModal from "@/components/Report/ReportModal.vue";
+import Buefy from "buefy";
+
+const localVue = createLocalVue();
+localVue.use(Buefy);
+config.mocks.$t = (key: string): string => key;
+
+const propsData = {
+  onConfirm: jest.fn(),
+};
+
+const generateWrapper = (customPropsData: Record<string, unknown> = {}) => {
+  return mount(ReportModal, {
+    localVue,
+    propsData: {
+      ...propsData,
+      ...customPropsData,
+    },
+  });
+};
+
+beforeEach(() => {
+  jest.resetAllMocks();
+});
+
+describe("ReportModal", () => {
+  it("renders report modal with basic informations and submits it", async () => {
+    const wrapper = generateWrapper();
+
+    expect(wrapper.find(".modal-card-head").exists()).toBe(false);
+
+    expect(wrapper.find(".media-content").text()).not.toContain(
+      "The content came from another server. Transfer an anonymous copy of the report?"
+    );
+
+    expect(
+      wrapper.find("footer.modal-card-foot button:first-child").text()
+    ).toBe("Cancel");
+
+    const submit = wrapper.find("footer.modal-card-foot button.is-primary");
+
+    expect(submit.text()).toBe("Send the report");
+
+    const textarea = wrapper.find("textarea");
+    textarea.setValue("some comment with my report");
+
+    submit.trigger("click");
+
+    await localVue.nextTick();
+    expect(wrapper.emitted().close).toBeTruthy();
+
+    expect(wrapper.vm.$props.onConfirm).toHaveBeenCalledTimes(1);
+    expect(wrapper.vm.$props.onConfirm).toHaveBeenCalledWith(
+      "some comment with my report",
+      false
+    );
+  });
+
+  it("renders report modal and shows an inline comment if it's provided", async () => {
+    const wrapper = generateWrapper({
+      comment: {
+        actor: { preferredUsername: "author", name: "I am the comment author" },
+        text: "this is my <b>comment</b> that will be reported",
+      },
+    });
+
+    const commentContainer = wrapper.find("article.media");
+    expect(commentContainer.find("strong").text()).toContain(
+      "I am the comment author"
+    );
+    expect(commentContainer.find("small").text()).toContain("author");
+    expect(commentContainer.find("p").html()).toContain(
+      "this is my <b>comment</b> that will be reported"
+    );
+  });
+
+  it("renders report modal with with a remote content", async () => {
+    const wrapper = generateWrapper({ outsideDomain: "somewhere.else" });
+
+    expect(wrapper.find(".media-content").text()).toContain(
+      "The content came from another server. Transfer an anonymous copy of the report?"
+    );
+
+    const submit = wrapper.find("footer.modal-card-foot button.is-primary");
+    submit.trigger("click");
+    await localVue.nextTick();
+
+    expect(wrapper.vm.$props.onConfirm).toHaveBeenCalledTimes(1);
+    expect(wrapper.vm.$props.onConfirm).toHaveBeenCalledWith("", false);
+  });
+
+  it("renders report modal with with a remote content and accept to forward", async () => {
+    const wrapper = generateWrapper({ outsideDomain: "somewhere.else" });
+
+    expect(wrapper.find(".media-content").text()).toContain(
+      "The content came from another server. Transfer an anonymous copy of the report?"
+    );
+
+    const switchButton = wrapper.find('input[type="checkbox"]');
+    switchButton.trigger("click");
+
+    const submit = wrapper.find("footer.modal-card-foot button.is-primary");
+    submit.trigger("click");
+    await localVue.nextTick();
+
+    expect(wrapper.vm.$props.onConfirm).toHaveBeenCalledTimes(1);
+    expect(wrapper.vm.$props.onConfirm).toHaveBeenCalledWith("", true);
+  });
+
+  it("renders report modal custom title and buttons", async () => {
+    const wrapper = generateWrapper({
+      title: "want to report something?",
+      cancelText: "nah",
+      confirmText: "report!",
+    });
+
+    expect(wrapper.find(".modal-card-head .modal-card-title").text()).toBe(
+      "want to report something?"
+    );
+
+    expect(
+      wrapper.find("footer.modal-card-foot button:first-child").text()
+    ).toBe("nah");
+
+    expect(
+      wrapper.find("footer.modal-card-foot button.is-primary").text()
+    ).toBe("report!");
+  });
+});
diff --git a/js/tests/unit/specs/mocks/event.ts b/js/tests/unit/specs/mocks/event.ts
new file mode 100644
index 000000000..b9aeebd6b
--- /dev/null
+++ b/js/tests/unit/specs/mocks/event.ts
@@ -0,0 +1,95 @@
+export const eventCommentThreadsMock = {
+  data: {
+    event: {
+      __typename: "Event",
+      id: "1",
+      uuid: "f37910ea-fd5a-4756-9679-00971f3f4106",
+      comments: [
+        {
+          __typename: "Comment",
+          id: "2",
+          uuid: "e37910ea-fd5a-4756-9679-00971f3f4107",
+          url:
+            "https://some-instance.tld/comments/e37910ea-fd5a-4756-9679-00971f3f4107",
+          text: "my comment text",
+          local: true,
+          visibility: "PUBLIC",
+          totalReplies: 5,
+          updatedAt: "2020-12-03T09:02:00Z",
+          actor: {
+            avatar: {
+              id: "78",
+              url: "http://someavatar.url.me",
+            },
+            id: "89",
+            domain: null,
+            preferredUsername: "someauthor",
+            name: "Some author",
+            summary: "I am the senate",
+          },
+          deletedAt: null,
+        },
+        {
+          __typename: "Comment",
+          id: "29",
+          uuid: "e37910ea-fd5a-4756-9679-01171f3f4107",
+          url:
+            "https://some-instance.tld/comments/e37910ea-fd5a-4756-9679-01171f3f4107",
+          text: "a second comment",
+          local: true,
+          visibility: "PUBLIC",
+          totalReplies: 0,
+          updatedAt: "2020-12-03T11:02:00Z",
+          actor: {
+            avatar: {
+              id: "78",
+              url: "http://someavatar.url.me",
+            },
+            id: "89",
+            domain: null,
+            preferredUsername: "someauthor",
+            name: "Some author",
+            summary: "I am the senate",
+          },
+          deletedAt: null,
+        },
+      ],
+    },
+  },
+};
+
+export const newCommentForEventMock = {
+  eventId: "1",
+  text: "my new comment",
+  inReplyToCommentId: null,
+};
+
+export const newCommentForEventResponse = {
+  data: {
+    createComment: {
+      id: "79",
+      uuid: "e37910ea-fd5a-4756-9679-01171f3f4444",
+      url:
+        "https://some-instance.tld/comments/e37910ea-fd5a-4756-9679-01171f3f4444",
+      text: newCommentForEventMock.text,
+      local: true,
+      visibility: "PUBLIC",
+      totalReplies: 0,
+      updatedAt: "2020-12-03T13:02:00Z",
+      originComment: null,
+      inReplyToComment: null,
+      actor: {
+        avatar: {
+          id: "78",
+          url: "http://someavatar.url.me",
+        },
+        id: "89",
+        domain: null,
+        preferredUsername: "someauthor",
+        name: "Some author",
+        summary: "I am the senate",
+      },
+      deletedAt: null,
+    },
+  },
+};