test: improve searching for elements on users page

packages/e2e-tests/fixtures/admin/application-settings-page.js

@@ -43,6 +43,10 @@ export class AdminApplicationSettingsPage extends AuthenticatedPage {
     await this.saveButton.click();
   }
 
+  async expectOnlyOneSuccessSnackbarToBeVisible() {
+    await expect(this.successSnackbar).toBeVisible();
+  }
+
   async expectSuccessSnackbarToBeVisible() {
     const snackbars = await this.successSnackbar.all();
     for (const snackbar of snackbars) {

packages/e2e-tests/fixtures/admin/users-page.js

@@ -27,6 +27,11 @@ export class AdminUsersPage extends AuthenticatedPage {
     await this.profileMenuButton.click();
     await this.adminMenuItem.click();
     await this.isMounted();
+    await Promise.all([
+      this.page.waitForResponse(
+        (resp) => resp.url().includes('/admin/users') && resp.status() === 200
+      ),
+    ]);
     if (await this.usersLoader.isVisible()) {
       await this.usersLoader.waitFor({
         state: 'detached',