diff --git a/e2e/playwright/info-drawer/src/tests/file-preview.e2e.ts b/e2e/playwright/info-drawer/src/tests/file-preview.e2e.ts
index 98f893e63..5303ad344 100755
--- a/e2e/playwright/info-drawer/src/tests/file-preview.e2e.ts
+++ b/e2e/playwright/info-drawer/src/tests/file-preview.e2e.ts
@@ -61,6 +61,7 @@ test.describe('File preview', () => {
     await Utils.reloadPageIfRowNotVisible(personalFiles, fileName);
     await personalFiles.dataTable.getRowByName(fileName).click();
     await personalFiles.acaHeader.viewButton.click();
+    await personalFiles.viewer.waitForViewerLoaderToFinish();
     await expect(personalFiles.viewer.pdfViewerContentPages.first()).toBeVisible();
     expect(await personalFiles.viewer.viewerDocument.textContent()).toContain('PDF');
   });
diff --git a/e2e/playwright/upload-download-actions/src/tests/upload-new-version.e2e.ts b/e2e/playwright/upload-download-actions/src/tests/upload-new-version.e2e.ts
index db62e2726..d4001e3c7 100755
--- a/e2e/playwright/upload-download-actions/src/tests/upload-new-version.e2e.ts
+++ b/e2e/playwright/upload-download-actions/src/tests/upload-new-version.e2e.ts
@@ -77,6 +77,7 @@ test.describe('Upload new version', () => {
 
   async function previewUnsupportedFile(page: PersonalFilesPage, unsupportedFileName: string): Promise<void> {
     await page.dataTable.performClickFolderOrFileToOpen(unsupportedFileName);
+    await page.viewer.waitForViewerLoaderToFinish();
     await page.viewer.checkUnknownFormatIsDisplayed();
     expect(await page.viewer.getUnknownFormatMessage()).toContain(`Couldn't load preview. Unsupported file type`);
     await page.viewer.closeButtonLocator.click();