diff --git a/commafeed-client/src/app/tree/tree.test.ts b/commafeed-client/src/app/tree/tree.test.ts
new file mode 100644
index 00000000..43aa0e15
--- /dev/null
+++ b/commafeed-client/src/app/tree/tree.test.ts
@@ -0,0 +1,119 @@
+import { configureStore } from "@reduxjs/toolkit"
+import { type RootState, reducers } from "app/store"
+import { selectNextUnreadTreeItem } from "app/tree/thunks"
+import type { Category, Subscription } from "app/types"
+import { describe, expect, it } from "vitest"
+
+const createCategory = (id: string): Category => ({
+    id,
+    name: id,
+    children: [],
+    feeds: [],
+    expanded: true,
+    position: 0,
+})
+
+const createFeed = (id: number, unread: number): Subscription => ({
+    id,
+    name: String(id),
+    unread,
+    errorCount: 0,
+    position: 0,
+    feedUrl: "",
+    feedLink: "",
+    iconUrl: "",
+})
+
+const root = createCategory("root")
+
+const catA = createCategory("catA")
+catA.feeds.push(createFeed(1, 0), createFeed(2, 0), createFeed(3, 1))
+
+const catB = createCategory("catB")
+
+const catC = createCategory("catC")
+catC.feeds.push(createFeed(4, 1))
+
+root.children.push(catA, catB, catC)
+
+describe("selectNextUnreadTreeItem", () => {
+    it("selects the next unread category", async () => {
+        const store = configureStore({
+            reducer: reducers,
+            preloadedState: {
+                tree: {
+                    rootCategory: root,
+                },
+                entries: {
+                    source: {
+                        type: "category",
+                        id: "catA",
+                    },
+                },
+            } as RootState,
+        })
+
+        await store.dispatch(selectNextUnreadTreeItem({ direction: "forward" }))
+        expect(store.getState().redirect.to).toBe("/app/category/catC")
+    })
+
+    it("selects the previous unread category", async () => {
+        const store = configureStore({
+            reducer: reducers,
+            preloadedState: {
+                tree: {
+                    rootCategory: root,
+                },
+                entries: {
+                    source: {
+                        type: "category",
+                        id: "catC",
+                    },
+                },
+            } as RootState,
+        })
+
+        await store.dispatch(selectNextUnreadTreeItem({ direction: "backward" }))
+        expect(store.getState().redirect.to).toBe("/app/category/catA")
+    })
+
+    it("selects the next unread feed", async () => {
+        const store = configureStore({
+            reducer: reducers,
+            preloadedState: {
+                tree: {
+                    rootCategory: root,
+                },
+                entries: {
+                    source: {
+                        type: "feed",
+                        id: "1",
+                    },
+                },
+            } as RootState,
+        })
+
+        await store.dispatch(selectNextUnreadTreeItem({ direction: "forward" }))
+        expect(store.getState().redirect.to).toBe("/app/feed/3")
+    })
+
+    it("selects the previous unread feed", async () => {
+        const store = configureStore({
+            reducer: reducers,
+            preloadedState: {
+                tree: {
+                    rootCategory: root,
+                },
+                entries: {
+                    source: {
+                        type: "feed",
+                        id: "4",
+                    },
+                },
+            } as RootState,
+        })
+
+        await store.dispatch(selectNextUnreadTreeItem({ direction: "backward" }))
+        expect(store.getState().redirect.to).toBe("/app/feed/3")
+    })
+})