diff --git a/tests/Feature/Api/V1/ItemsAggregationsTest.php b/tests/Feature/Api/V1/ItemsAggregationsTest.php
index 3375ded58..d94bac7e0 100644
--- a/tests/Feature/Api/V1/ItemsAggregationsTest.php
+++ b/tests/Feature/Api/V1/ItemsAggregationsTest.php
@@ -129,4 +129,18 @@ public function test_size_limits_number_of_buckets()
             ])['topic']
         );
     }
+
+    public function test_search_for_authors_with_same_name()
+    {
+        $authorSameName = Item::factory()->create([
+            'author' => 'Galanda, Mikuláš',
+        ]);
+
+        $this->getAggregations([
+            'filter' => ['author_id' => [1]],
+            'terms' => ['author' => 'author'],
+        ])->assertExactJson([
+            'author' => [['value' => 'Galanda, Mikuláš', 'count' => 1]],
+        ]);
+    }
 }
diff --git a/tests/Feature/Api/V1/ItemsTest.php b/tests/Feature/Api/V1/ItemsTest.php
index daadcace7..689fd5ea2 100644
--- a/tests/Feature/Api/V1/ItemsTest.php
+++ b/tests/Feature/Api/V1/ItemsTest.php
@@ -2,6 +2,7 @@
 
 namespace Tests\Feature\Api\V1;
 
+use App\Authority;
 use App\Elasticsearch\Repositories\ItemRepository;
 use App\Item;
 use Illuminate\Foundation\Testing\RefreshDatabase;
@@ -95,6 +96,41 @@ public function test_filtering_by_color()
         ]);
     }
 
+    public function test_distinguishes_authors_with_same_name()
+    {
+        $author1 = Authority::factory()->create(['name' => 'Věšín, Jaroslav']);
+        $author2 = Authority::factory()->create(['name' => 'Věšín, Jaroslav']);
+
+        Item::factory()
+            ->create()
+            ->authorities()
+            ->save($author1);
+        Item::factory()
+            ->create()
+            ->authorities()
+            ->save($author2);
+
+        app(ItemRepository::class)->refreshIndex();
+
+        $searchByName = route('api.v1.items.index', [
+            'size' => 10,
+            'filter[author]' => 'Věšín, Jaroslav',
+        ]);
+
+        $this->getJson($searchByName)->assertJson([
+            'total' => 2,
+        ]);
+
+        $searchById = route('api.v1.items.index', [
+            'size' => 10,
+            'filter[author_id]' => $author1->id,
+        ]);
+
+        $this->getJson($searchById)->assertJson([
+            'total' => 1,
+        ]);
+    }
+
     public function test_sorting()
     {
         Item::factory()->create(['title' => 'zebra']);