diff --git a/packages/ui-default/components/scratchpad/DataInputComponent.jsx b/packages/ui-default/components/scratchpad/DataInputComponent.jsx
index df157edb3..0726ede4d 100644
--- a/packages/ui-default/components/scratchpad/DataInputComponent.jsx
+++ b/packages/ui-default/components/scratchpad/DataInputComponent.jsx
@@ -14,7 +14,7 @@ export default function DataInputComponent(props) {
   return (
     <div {...rest} className={cn}>
       {html // eslint-disable-next-line react/no-danger
-        ? <div className="scratchpad__data-input" wrap="off" dangerouslySetInnerHTML={{ __html: value }} />
+        ? <div className="scratchpad__data-input" wrap="off"><pre dangerouslySetInnerHTML={{ __html: value }} /></div>
         : (
           <textarea
             className="scratchpad__data-input"
diff --git a/packages/ui-default/components/scratchpad/ScratchpadEditorContainer.jsx b/packages/ui-default/components/scratchpad/ScratchpadEditorContainer.jsx
index eded90e4d..1ad635fcb 100644
--- a/packages/ui-default/components/scratchpad/ScratchpadEditorContainer.jsx
+++ b/packages/ui-default/components/scratchpad/ScratchpadEditorContainer.jsx
@@ -88,7 +88,7 @@ export default connect(mapStateToProps, mapDispatchToProps)(class MonacoEditor e
   componentWillUnmount() {
     if (this.editor) this.editor.dispose();
     if (this.model) this.model.dispose();
-    this.disposable.map((i) => i());
+    this.disposable.map((i) => i.dispose());
   }
 
   assignRef = (component) => {
diff --git a/packages/ui-default/components/scratchpad/ScratchpadToolbarContainer.jsx b/packages/ui-default/components/scratchpad/ScratchpadToolbarContainer.jsx
index 794ef59bd..1f346d9ec 100644
--- a/packages/ui-default/components/scratchpad/ScratchpadToolbarContainer.jsx
+++ b/packages/ui-default/components/scratchpad/ScratchpadToolbarContainer.jsx
@@ -40,7 +40,7 @@ const mapDispatchToProps = (dispatch) => ({
     const req = request.post(UiContext.postPretestUrl, {
       lang: props.editorLang,
       code: props.editorCode,
-      input: props.pretestInput,
+      input: props.pretestInput || ' ',
     });
     dispatch({
       type: 'SCRATCHPAD_POST_PRETEST',
diff --git a/packages/ui-default/components/scratchpad/reducers/pretest.js b/packages/ui-default/components/scratchpad/reducers/pretest.js
index 12aa19e4f..71db3e6b4 100644
--- a/packages/ui-default/components/scratchpad/reducers/pretest.js
+++ b/packages/ui-default/components/scratchpad/reducers/pretest.js
@@ -15,7 +15,7 @@ export default function reducer(state = {
   if (action.type === 'SCRATCHPAD_RECORDS_PUSH') {
     const { rdoc } = action.payload;
     if (rdoc._id === state.rid) {
-      const output = [`${STATUS_TEXTS[rdoc.status]} ${rdoc.time}ms ${rdoc.memory}MiB`];
+      const output = [`${STATUS_TEXTS[rdoc.status]} ${rdoc.time}ms ${rdoc.memory}KiB`];
       if (rdoc.compilerTexts.length) output.push(rdoc.compilerTexts.join('\n'));
       if (rdoc.testCases.length) output.push(rdoc.testCases[0].message || '');
       return {
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 6b829d738..654a5338f 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.8.42",
+  "version": "4.8.43",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",