diff --git a/src/infrastructure/Threading/AsyncSleep.ts b/src/infrastructure/Threading/AsyncSleep.ts
new file mode 100644
index 00000000..ff0388af
--- /dev/null
+++ b/src/infrastructure/Threading/AsyncSleep.ts
@@ -0,0 +1,5 @@
+export type SchedulerType = (callback: (...args: any[]) => void, ms: number) => void;
+
+export function sleepAsync(time: number, scheduler: SchedulerType = setTimeout) {
+    return new Promise((resolve) => scheduler(() => resolve(undefined), time));
+}
diff --git a/src/presentation/components/Scripts/ScriptsTree/SelectableTree/SelectableTree.vue b/src/presentation/components/Scripts/ScriptsTree/SelectableTree/SelectableTree.vue
index c4e36095..8746c433 100644
--- a/src/presentation/components/Scripts/ScriptsTree/SelectableTree/SelectableTree.vue
+++ b/src/presentation/components/Scripts/ScriptsTree/SelectableTree/SelectableTree.vue
@@ -22,7 +22,8 @@ import LiquorTree from 'liquor-tree';
 import Node from './Node/Node.vue';
 import { INode } from './Node/INode';
 import { convertExistingToNode, toNewLiquorTreeNode } from './LiquorTree/NodeWrapper/NodeTranslator';
-import { INodeSelectedEvent } from './/INodeSelectedEvent';
+import { INodeSelectedEvent } from './INodeSelectedEvent';
+import { sleepAsync } from '@/infrastructure/Threading/AsyncSleep';
 import { getNewState } from './LiquorTree/NodeWrapper/NodeStateUpdater';
 import { LiquorTreeOptions } from './LiquorTree/LiquorTreeOptions';
 import { FilterPredicate, NodePredicateFilter } from './LiquorTree/NodeWrapper/NodePredicateFilter';
@@ -121,7 +122,6 @@ function recurseDown(
 async function tryUntilDefinedAsync<T>(
     accessor: () => T | undefined,
     delayInMs: number, maxTries: number): Promise<T | undefined> {
-    const sleepAsync = () => new Promise(((resolve) => setTimeout(resolve, delayInMs)));
     let triesLeft = maxTries;
     let value: T;
     while (triesLeft !== 0) {
@@ -130,7 +130,7 @@ async function tryUntilDefinedAsync<T>(
             return value;
         }
         triesLeft--;
-        await sleepAsync();
+        await sleepAsync(delayInMs);
     }
     return value;
 }
diff --git a/tests/unit/infrastructure/AsyncLazy.spec.ts b/tests/unit/infrastructure/Threading/AsyncLazy.spec.ts
similarity index 94%
rename from tests/unit/infrastructure/AsyncLazy.spec.ts
rename to tests/unit/infrastructure/Threading/AsyncLazy.spec.ts
index 003f5edf..45ca1d15 100644
--- a/tests/unit/infrastructure/AsyncLazy.spec.ts
+++ b/tests/unit/infrastructure/Threading/AsyncLazy.spec.ts
@@ -1,6 +1,7 @@
 import 'mocha';
 import { expect } from 'chai';
 import { AsyncLazy } from '@/infrastructure/Threading/AsyncLazy';
+import { sleepAsync } from '@/infrastructure/Threading/AsyncSleep';
 
 describe('AsyncLazy', () => {
     it('returns value from lambda', async () => {
@@ -33,7 +34,6 @@ describe('AsyncLazy', () => {
         });
         it('when running long-running task in parallel', async () => {
             // act
-            const sleepAsync = (time: number) => new Promise(((resolve) => setTimeout(resolve, time)));
             const sut = new AsyncLazy(async () => {
                 await sleepAsync(100);
                 totalExecuted++;
diff --git a/tests/unit/infrastructure/Threading/AsyncSleep.spec.ts b/tests/unit/infrastructure/Threading/AsyncSleep.spec.ts
new file mode 100644
index 00000000..9172bd71
--- /dev/null
+++ b/tests/unit/infrastructure/Threading/AsyncSleep.spec.ts
@@ -0,0 +1,79 @@
+import 'mocha';
+import { expect } from 'chai';
+import { sleepAsync, SchedulerType } from '@/infrastructure/Threading/AsyncSleep';
+
+describe('AsyncSleep', () => {
+    it('fulfills after delay', async () => {
+        // arrange
+        const delayInMs = 10;
+        const scheduler = new SchedulerMock();
+        // act
+        const sleep = sleepAsync(delayInMs, scheduler.mock);
+        const promiseState = watchPromiseState(sleep);
+        scheduler.tickNext(delayInMs);
+        await flushPromiseResolutionQueue();
+        // assert
+        const actual = promiseState.isFulfilled();
+        expect(actual).to.equal(true);
+    });
+    it('pending before delay', async () => {
+        // arrange
+        const delayInMs = 10;
+        const scheduler = new SchedulerMock();
+        // act
+        const sleep = sleepAsync(delayInMs, scheduler.mock);
+        const promiseState = watchPromiseState(sleep);
+        scheduler.tickNext(delayInMs / 5);
+        await flushPromiseResolutionQueue();
+        // assert
+        const actual = promiseState.isPending();
+        expect(actual).to.equal(true);
+    });
+});
+
+function flushPromiseResolutionQueue() {
+    return Promise.resolve();
+}
+
+class SchedulerMock {
+    public readonly mock: SchedulerType;
+    private currentTime = 0;
+    private scheduledActions = new Array<{time: number, action: (...args: any[]) => void}>();
+    constructor() {
+        this.mock = (callback: (...args: any[]) => void, ms: number) => {
+            this.scheduledActions.push({ time: this.currentTime + ms, action: callback });
+        };
+    }
+    public tickNext(ms: number) {
+        const newTime = this.currentTime + ms;
+        let newActions = this.scheduledActions;
+        for (const action of this.scheduledActions) {
+            if (newTime >= action.time) {
+                newActions = newActions.filter((a) => a !== action);
+                action.action();
+            }
+        }
+        this.scheduledActions = newActions;
+    }
+}
+
+function watchPromiseState<T>(promise: Promise<T>) {
+    let isPending = true;
+    let isRejected = false;
+    let isFulfilled = false;
+    promise.then(
+        () => {
+            isFulfilled = true;
+            isPending = false;
+        },
+        () => {
+            isRejected = true;
+            isPending = false;
+        },
+    );
+    return {
+        isFulfilled: () => isFulfilled,
+        isPending: () => isPending,
+        isRejected: () => isRejected,
+    };
+}