diff --git a/packages/react/src/components/Comments/Comment.test.tsx b/packages/react/src/components/Comments/Comment.test.tsx
new file mode 100644
index 0000000000..c82205eaca
--- /dev/null
+++ b/packages/react/src/components/Comments/Comment.test.tsx
@@ -0,0 +1,121 @@
+import { en } from "@blocknote/core/locales";
+import type { CommentData, ThreadData } from "@blocknote/core/comments";
+import type { ReactNode } from "react";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it, vi } from "vite-plus/test";
+
+import { Comment } from "./Comment.js";
+
+const { passThrough, components, allow } = vi.hoisted(() => {
+  const passThrough = ({ children }: { children?: ReactNode }) => (
+    <>{children}</>
+  );
+
+  // Stand-ins for the UI library components. Like the real Mantine, Ariakit
+  // and ShadCN toolbar buttons, this one uses `label` as its `aria-label`.
+  const components = {
+    Comments: {
+      Comment: ({ actions }: { actions?: ReactNode }) => <div>{actions}</div>,
+    },
+    Generic: {
+      Toolbar: {
+        Root: passThrough,
+        Button: ({
+          label,
+          children,
+        }: {
+          label?: string;
+          children?: ReactNode;
+        }) => <button aria-label={label}>{children}</button>,
+      },
+      Menu: {
+        Root: passThrough,
+        Trigger: passThrough,
+        Dropdown: () => null,
+        Item: () => null,
+      },
+    },
+  };
+
+  return { passThrough, components, allow: () => true };
+});
+
+vi.mock("../../editor/ComponentsContext.js", () => ({
+  useComponentsContext: () => components,
+}));
+vi.mock("../../editor/PortalElementOverride.js", () => ({
+  usePortalElement: () => undefined,
+}));
+vi.mock("../../i18n/dictionary.js", () => ({
+  useDictionary: () => en,
+}));
+vi.mock("../../hooks/useExtension.js", () => ({
+  useExtension: () => ({
+    threadStore: {
+      auth: {
+        canAddReaction: allow,
+        canDeleteComment: allow,
+        canUpdateComment: allow,
+        canResolveThread: allow,
+        canUnresolveThread: allow,
+      },
+    },
+  }),
+}));
+vi.mock("../../hooks/useCreateBlockNote.js", () => ({
+  useCreateBlockNote: () => ({ getExtension: () => ({ submit: vi.fn() }) }),
+}));
+vi.mock("./useCommentUsers.js", () => ({ useCommentUser: () => undefined }));
+vi.mock("./CommentEditor.js", () => ({ CommentEditor: () => null }));
+vi.mock("./EmojiPicker.js", () => ({ EmojiPicker: passThrough }));
+
+const date = new Date(2026, 0, 1);
+const comment = {
+  type: "comment",
+  id: "comment-1",
+  userId: "user-1",
+  createdAt: date,
+  updatedAt: date,
+  reactions: [],
+  metadata: {},
+  body: [],
+} as unknown as CommentData;
+
+function thread(resolved: boolean) {
+  return {
+    type: "thread",
+    id: "thread-1",
+    createdAt: date,
+    updatedAt: date,
+    comments: [comment],
+    resolved,
+    metadata: {},
+  } as unknown as ThreadData;
+}
+
+describe("Comment actions", () => {
+  it.each([
+    [false, en.comments.actions.resolve],
+    [true, en.comments.actions.reopen],
+  ])(
+    "icon-only buttons have an accessible name (resolved: %s)",
+    (resolved, resolveOrReopen) => {
+      const html = renderToStaticMarkup(
+        <Comment
+          comment={comment}
+          thread={thread(resolved)}
+          showResolveButton
+        />,
+      );
+
+      const buttons = html.match(/<button[^>]*>/g) ?? [];
+      expect(
+        buttons.map((button) => button.match(/aria-label="([^"]*)"/)?.[1]),
+      ).toEqual([
+        en.comments.actions.add_reaction,
+        resolveOrReopen,
+        en.comments.actions.more_actions,
+      ]);
+    },
+  );
+});
diff --git a/packages/react/src/components/Comments/Comment.tsx b/packages/react/src/components/Comments/Comment.tsx
index 527cb739b4..1e0f0bd77c 100644
--- a/packages/react/src/components/Comments/Comment.tsx
+++ b/packages/react/src/components/Comments/Comment.tsx
@@ -270,6 +270,7 @@ export const Comment = ({
           >
             <Components.Generic.Toolbar.Button
               key={"add-reaction"}
+              label={dict.comments.actions.add_reaction}
               mainTooltip={dict.comments.actions.add_reaction}
               variant="compact"
             >
@@ -281,6 +282,7 @@ export const Comment = ({
           (thread.resolved ? (
             <Components.Generic.Toolbar.Button
               key={"reopen"}
+              label={dict.comments.actions.reopen}
               mainTooltip={dict.comments.actions.reopen}
               variant="compact"
               onClick={onReopen}
@@ -290,6 +292,7 @@ export const Comment = ({
           ) : (
             <Components.Generic.Toolbar.Button
               key={"resolve"}
+              label={dict.comments.actions.resolve}
               mainTooltip={dict.comments.actions.resolve}
               variant="compact"
               onClick={onResolve}
@@ -306,6 +309,7 @@ export const Comment = ({
             <Components.Generic.Menu.Trigger>
               <Components.Generic.Toolbar.Button
                 key={"more-actions"}
+                label={dict.comments.actions.more_actions}
                 mainTooltip={dict.comments.actions.more_actions}
                 variant="compact"
               >