diff --git a/marketplace-ui/src/app/modules/release-preview/release-preview.component.html b/marketplace-ui/src/app/modules/release-preview/release-preview.component.html
index 810bca8a..8865d982 100644
--- a/marketplace-ui/src/app/modules/release-preview/release-preview.component.html
+++ b/marketplace-ui/src/app/modules/release-preview/release-preview.component.html
@@ -91,7 +91,7 @@ <h3 [lang]="languageService.selectedLanguage()" class="text-secondary">
                   [lang]="languageService.selectedLanguage()"
                   class="readme-content"
                   [data]="
-                    getProductModuleContentValue(displayedTab)
+                    getReadmeContentValue(displayedTab)
                       | multilingualism: languageService.selectedLanguage()
                   "></markdown>
               </div>
diff --git a/marketplace-ui/src/app/modules/release-preview/release-preview.component.spec.ts b/marketplace-ui/src/app/modules/release-preview/release-preview.component.spec.ts
index e69de29b..0a276cff 100644
--- a/marketplace-ui/src/app/modules/release-preview/release-preview.component.spec.ts
+++ b/marketplace-ui/src/app/modules/release-preview/release-preview.component.spec.ts
@@ -0,0 +1,159 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { ReleasePreviewComponent } from './release-preview.component';
+import { ReleasePreviewService } from './release-preview.service';
+import { of, throwError } from 'rxjs';
+import { TranslateService } from '@ngx-translate/core';
+import { LanguageService } from '../../core/services/language/language.service';
+import { ThemeService } from '../../core/services/theme/theme.service';
+import { CommonUtils } from '../../shared/utils/common.utils';
+import { FormsModule } from '@angular/forms';
+import { CommonModule } from '@angular/common';
+import { TranslateModule } from '@ngx-translate/core';
+import { MarkdownModule } from 'ngx-markdown';
+import {
+  provideHttpClient,
+  withInterceptorsFromDi
+} from '@angular/common/http';
+import { provideHttpClientTesting } from '@angular/common/http/testing';
+
+class MockReleasePreviewService {
+  extractZipDetails(file: File) {
+    return of({
+      description: {
+        en: 'Description in English',
+        de: 'Beschreibung auf Deutsch'
+      },
+      setup: { en: 'Setup in English', de: 'Setup auf Deutsch' },
+      demo: { en: 'Demo in English', de: 'Demo auf Deutsch' }
+    });
+  }
+}
+
+describe('ReleasePreviewComponent', () => {
+  let component: ReleasePreviewComponent;
+  let fixture: ComponentFixture<ReleasePreviewComponent>;
+  let releasePreviewService: ReleasePreviewService;
+  let languageService: jasmine.SpyObj<LanguageService>;
+
+  beforeEach(async () => {
+    const routingQueryParamServiceSpy = jasmine.createSpyObj(
+      'RoutingQueryParamService',
+      ['getDesignerVersionFromSessionStorage', 'isDesignerEnv']
+    );
+
+    const languageServiceSpy = jasmine.createSpyObj('LanguageService', [
+      'selectedLanguage'
+    ]);
+
+    await TestBed.configureTestingModule({
+      imports: [
+        ReleasePreviewComponent,
+        TranslateModule.forRoot(),
+        MarkdownModule.forRoot()
+      ],
+      providers: [
+        provideHttpClient(withInterceptorsFromDi()),
+        provideHttpClientTesting(),
+        {
+          provide: LanguageService,
+          useValue: languageServiceSpy
+        }
+      ]
+    }).compileComponents();
+    languageService = TestBed.inject(
+      LanguageService
+    ) as jasmine.SpyObj<LanguageService>;
+  });
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(ReleasePreviewComponent);
+    component = fixture.componentInstance;
+    releasePreviewService = TestBed.inject(ReleasePreviewService);
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+
+  it('should set selected file on file selection', () => {
+    const mockFile = new File(['content'], 'test.zip', {
+      type: 'application/zip'
+    });
+    const event = {
+      target: {
+        files: [mockFile]
+      }
+    } as unknown as Event;
+
+    component.onFileSelected(event);
+
+    expect(component.selectedFile).toEqual(mockFile);
+    expect(component.isZipFile).toBeTrue();
+    expect(component.errorMessage).toBe('');
+  });
+
+  it('should display error for non-zip file', () => {
+    const mockFile = new File(['content'], 'test.txt', { type: 'text/plain' });
+    const event = {
+      target: {
+        files: [mockFile]
+      }
+    } as unknown as Event;
+
+    component.onFileSelected(event);
+
+    expect(component.selectedFile).toEqual(mockFile);
+    expect(component.isZipFile).toBeFalse();
+    expect(component.errorMessage).toBe('Please upload a valid ZIP file.');
+  });
+
+  it('should update tabs on valid response', () => {
+    const mockResponse = {
+      description: {
+        en: 'Description in English',
+        de: 'Beschreibung auf Deutsch'
+      },
+      setup: { en: 'Setup in English', de: 'Setup auf Deutsch' },
+      demo: { en: 'Demo in English', de: 'Demo auf Deutsch' }
+    };
+
+    component.updateTabs(mockResponse);
+
+    expect(component.tabs.length).toBe(3);
+    expect(component.tabs[0].label).toBe('Description');
+    expect(component.tabs[0].content).toBe('Description in English');
+  });
+
+  it('should handle file upload and call service', () => {
+    spyOn(releasePreviewService, 'extractZipDetails').and.callThrough();
+
+    const mockFile = new File(['content'], 'test.zip', {
+      type: 'application/zip'
+    });
+    component.selectedFile = mockFile;
+    component.isZipFile = true;
+
+    component.onSubmit();
+
+    expect(releasePreviewService.extractZipDetails).toHaveBeenCalledWith(
+      mockFile
+    );
+  });
+
+  it('should display error message on service error', () => {
+    spyOn(releasePreviewService, 'extractZipDetails').and.returnValue(
+      throwError(() => new Error('Service error'))
+    );
+
+    const mockFile = new File(['content'], 'test.zip', {
+      type: 'application/zip'
+    });
+    component.selectedFile = mockFile;
+    component.isZipFile = true;
+
+    component.onSubmit();
+
+    expect(component.errorMessage).toBe('Service error');
+  });
+});
diff --git a/marketplace-ui/src/app/modules/release-preview/release-preview.component.ts b/marketplace-ui/src/app/modules/release-preview/release-preview.component.ts
index cbea55d7..24b62d7f 100644
--- a/marketplace-ui/src/app/modules/release-preview/release-preview.component.ts
+++ b/marketplace-ui/src/app/modules/release-preview/release-preview.component.ts
@@ -48,7 +48,7 @@ export class ReleasePreviewComponent {
   availableLanguages = ['en', 'de'];
   selectedLanguage = 'en';
   isZipFile = false;
-  productModuleContent: WritableSignal<ReleasePreviewData> = signal(
+  readmeContent: WritableSignal<ReleasePreviewData> = signal(
     {} as ReleasePreviewData
   );
   languageService = inject(LanguageService);
@@ -124,7 +124,7 @@ export class ReleasePreviewComponent {
     this.releasePreviewService.extractZipDetails(this.selectedFile).subscribe({
       next: response => {
         this.loading = false;
-        this.productModuleContent.set(response);
+        this.readmeContent.set(response);
         this.updateTabs(response);
       },
       error: error => {
@@ -146,7 +146,7 @@ export class ReleasePreviewComponent {
   }
 
   getContent(value: string): boolean {
-    const content = this.productModuleContent();
+    const content = this.readmeContent();
 
     if (!content || Object.keys(content).length === 0) {
       return false;
@@ -180,9 +180,9 @@ export class ReleasePreviewComponent {
     return CommonUtils.getLabel(this.activeTab, PRODUCT_DETAIL_TABS);
   }
 
-  getProductModuleContentValue(key: ItemDropdown): DisplayValue | null {
+  getReadmeContentValue(key: ItemDropdown): DisplayValue | null {
     type tabName = 'description' | 'demo' | 'setup';
     const value = key.value as tabName;
-    return this.productModuleContent()[value];
+    return this.readmeContent()[value];
   }
 }