diff --git a/src/public/app/widgets/type_widgets/ckeditor/config.spec.ts b/src/public/app/widgets/type_widgets/ckeditor/config.spec.ts
new file mode 100644
index 000000000..8c96629b9
--- /dev/null
+++ b/src/public/app/widgets/type_widgets/ckeditor/config.spec.ts
@@ -0,0 +1,31 @@
+import { describe, expect, it } from "vitest";
+import { buildClassicToolbar, buildFloatingToolbar } from "./config.js";
+
+type ToolbarConfig = string | "|" | { items: ToolbarConfig[] };
+
+describe("CKEditor config", () => {
+    it("has same toolbar items for fixed and floating", () => {
+        function traverseItems(config: ToolbarConfig): string[] {
+            const result = [];
+            if (typeof config === "object") {
+                for (const item of config.items) {
+                    result.push(traverseItems(item));
+                }
+            } else if (config !== "|") {
+                result.push(config);
+            }
+            return result.flat();
+        }
+
+        const classicToolbarConfig = buildClassicToolbar(false);
+        const classicToolbarItems = new Set(traverseItems(classicToolbarConfig.toolbar));
+
+        const floatingToolbarConfig = buildFloatingToolbar();
+        const floatingToolbarItems = traverseItems(floatingToolbarConfig.toolbar);
+        const floatingBlockToolbarItems = traverseItems({ items: floatingToolbarConfig.blockToolbar });
+        const floatingToolbarAllItems = new Set([ ...floatingToolbarItems, ...floatingBlockToolbarItems ]);
+
+        expect([ ...classicToolbarItems ].toSorted())
+            .toStrictEqual([...floatingToolbarAllItems ].toSorted());
+    });
+});
diff --git a/src/public/app/widgets/type_widgets/ckeditor/config.ts b/src/public/app/widgets/type_widgets/ckeditor/config.ts
index 935854417..010379ee1 100644
--- a/src/public/app/widgets/type_widgets/ckeditor/config.ts
+++ b/src/public/app/widgets/type_widgets/ckeditor/config.ts
@@ -110,7 +110,7 @@ export function buildToolbarConfig(isClassicToolbar: boolean) {
     }
 }
 
-function buildClassicToolbar(multilineToolbar: boolean) {
+export function buildClassicToolbar(multilineToolbar: boolean) {
     // For nested toolbars, refer to https://ckeditor.com/docs/ckeditor5/latest/getting-started/setup/toolbar.html#grouping-toolbar-items-in-dropdowns-nested-toolbars.
     return {
         toolbar: {
@@ -156,7 +156,7 @@ function buildClassicToolbar(multilineToolbar: boolean) {
     };
 }
 
-function buildFloatingToolbar() {
+export function buildFloatingToolbar() {
     return {
         toolbar: {
             items: [