diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9f38833..b4ad4e9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,6 +25,8 @@ jobs:
         run: npm run lint
       - name: Typecheck
         run: npm run typecheck
+      - name: Build
+        run: npm run build
 
   tests:
     name: Tests
diff --git a/src/components/utils/validation/datePicker.ts b/src/components/utils/validation/datePicker.ts
index 4dd7454..b14586c 100644
--- a/src/components/utils/validation/datePicker.ts
+++ b/src/components/utils/validation/datePicker.ts
@@ -2,7 +2,7 @@ import type {DateTime} from '@gravity-ui/date-utils';
 
 import {i18n} from './i18n';
 
-interface ValidationResult {
+export interface ValidationResult {
     isInvalid: boolean;
     errors: string[];
 }