diff --git a/packages/docusaurus-plugin-content-showcase/src/__tests__/options.test.ts b/packages/docusaurus-plugin-content-showcase/src/__tests__/options.test.ts
index 4b95f8dfe3..f35c05ae6d 100644
--- a/packages/docusaurus-plugin-content-showcase/src/__tests__/options.test.ts
+++ b/packages/docusaurus-plugin-content-showcase/src/__tests__/options.test.ts
@@ -4,6 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  */
+import {fromPartial} from '@total-typescript/shoehorn';
 import {normalizePluginOptions} from '@docusaurus/utils-validation';
 import {validateOptions, DEFAULT_OPTIONS} from '../options';
 import type {Options} from '@docusaurus/plugin-content-showcase';
@@ -101,7 +102,7 @@ describe('normalizeShowcasePluginOptions', () => {
         },
       },
     };
-    expect(testValidate(userOptions)).toEqual({
+    expect(testValidate(fromPartial(userOptions))).toEqual({
       ...defaultOptions,
       ...userOptions,
     });
diff --git a/packages/docusaurus-plugin-content-showcase/src/__tests__/tags.test.ts b/packages/docusaurus-plugin-content-showcase/src/__tests__/tags.test.ts
index 3e756b31e1..ac4946ec56 100644
--- a/packages/docusaurus-plugin-content-showcase/src/__tests__/tags.test.ts
+++ b/packages/docusaurus-plugin-content-showcase/src/__tests__/tags.test.ts
@@ -5,6 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import {fromPartial} from '@total-typescript/shoehorn';
 import {getTagsList} from '../tags';
 
 const tags = {
@@ -32,24 +33,24 @@ const invalidTags = {
 
 describe('showcase tags', () => {
   it('get tag list', async () => {
-    const tagList = await getTagsList({
-      configTags: tags,
+    const {tagKeys} = await getTagsList({
+      configTags: fromPartial(tags),
       configPath: '',
     });
-    expect(tagList).toEqual(Object.keys(tags));
+    expect(tagKeys).toEqual(Object.keys(tags));
   });
 
   it('get tag list from file', async () => {
-    const tagList = await getTagsList({
+    const {tagKeys} = await getTagsList({
       configTags: './__fixtures__/tags.yml',
       configPath: __dirname,
     });
-    expect(tagList).toEqual(Object.keys(tags));
+    expect(tagKeys).toEqual(Object.keys(tags));
   });
 
   it('error get tag list', async () => {
     const tagList = getTagsList({
-      configTags: invalidTags,
+      configTags: fromPartial(invalidTags),
       configPath: '',
     });
 
diff --git a/packages/docusaurus-plugin-content-showcase/src/__tests__/validation.test.ts b/packages/docusaurus-plugin-content-showcase/src/__tests__/validation.test.ts
index 6d6d501eac..8145d7dbd0 100644
--- a/packages/docusaurus-plugin-content-showcase/src/__tests__/validation.test.ts
+++ b/packages/docusaurus-plugin-content-showcase/src/__tests__/validation.test.ts
@@ -31,11 +31,11 @@ const tags = {
 };
 
 async function prepareSchema() {
-  const tagList = await getTagsList({
-    configTags: tags,
+  const {tagKeys} = await getTagsList({
+    configTags: fromPartial(tags),
     configPath: '',
   });
-  return createShowcaseItemSchema(tagList);
+  return createShowcaseItemSchema(tagKeys);
 }
 
 describe('showcase item schema', () => {
@@ -57,6 +57,7 @@ describe('showcase item schema', () => {
       description: 'description',
       preview: 'preview',
       source: 'source',
+      // @ts-expect-error: invalid tag
       tags: ['invalid'],
       website: 'website',
     };