diff --git a/superset-frontend/src/components/ErrorMessage/MarshmallowErrorMessage.test.tsx b/superset-frontend/src/components/ErrorMessage/MarshmallowErrorMessage.test.tsx
new file mode 100644
index 0000000000000..5fd6ee7bfbd44
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+++ b/superset-frontend/src/components/ErrorMessage/MarshmallowErrorMessage.test.tsx
@@ -0,0 +1,86 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import React from 'react';
+import { render, screen, fireEvent } from '@testing-library/react';
+import '@testing-library/jest-dom/extend-expect';
+import { ThemeProvider, supersetTheme } from '@superset-ui/core';
+import { ErrorLevel, ErrorTypeEnum } from 'src/components/ErrorMessage/types';
+import MarshmallowErrorMessage from './MarshmallowErrorMessage';
+
+describe('MarshmallowErrorMessage', () => {
+  const mockError = {
+    extra: {
+      messages: {
+        name: ["can't be blank"],
+        age: {
+          inner: ['is too low'],
+        },
+      },
+      payload: {
+        name: '',
+        age: {
+          inner: 10,
+        },
+      },
+      issue_codes: [],
+    },
+    message: 'Validation failed',
+    error_type: ErrorTypeEnum.MARSHMALLOW_ERROR,
+    level: 'error' as ErrorLevel,
+  };
+
+  test('renders without crashing', () => {
+    render(
+      <ThemeProvider theme={supersetTheme}>
+        <MarshmallowErrorMessage error={mockError} />
+      </ThemeProvider>,
+    );
+    expect(screen.getByText('Validation failed')).toBeInTheDocument();
+  });
+
+  test('renders the provided subtitle', () => {
+    render(
+      <ThemeProvider theme={supersetTheme}>
+        <MarshmallowErrorMessage error={mockError} subtitle="Error Alert" />
+      </ThemeProvider>,
+    );
+    expect(screen.getByText('Error Alert')).toBeInTheDocument();
+  });
+
+  test('renders extracted invalid values', () => {
+    render(
+      <ThemeProvider theme={supersetTheme}>
+        <MarshmallowErrorMessage error={mockError} />
+      </ThemeProvider>,
+    );
+    expect(screen.getByText("can't be blank:")).toBeInTheDocument();
+    expect(screen.getByText('is too low: 10')).toBeInTheDocument();
+  });
+
+  test('renders the JSONTree when details are expanded', () => {
+    render(
+      <ThemeProvider theme={supersetTheme}>
+        <MarshmallowErrorMessage error={mockError} />
+      </ThemeProvider>,
+    );
+    fireEvent.click(screen.getByText('Details'));
+    expect(screen.getByText('"can\'t be blank"')).toBeInTheDocument();
+  });
+});