diff --git a/app/Infrastructure/Slack/Controller.php b/app/Infrastructure/Slack/Controller.php
index 60eaaa5..a3467bb 100644
--- a/app/Infrastructure/Slack/Controller.php
+++ b/app/Infrastructure/Slack/Controller.php
@@ -50,7 +50,7 @@ class Controller extends SlackController
             );
 
         return Response::create($this->request)
-            ->withText(":x: Polecenie `/{$this->request->command} {$this->request->text}` jest niepoprawna:")
+            ->withText(":x: Polecenie `/{$this->request->command} {$this->request->text}` jest niepoprawne:")
             ->withAttachments($errors->all());
     }
 }
diff --git a/tests/Unit/SendDailySummaryToSlackTest.php b/tests/Unit/SendDailySummaryToSlackTest.php
index 96014e2..93be6bf 100644
--- a/tests/Unit/SendDailySummaryToSlackTest.php
+++ b/tests/Unit/SendDailySummaryToSlackTest.php
@@ -38,7 +38,7 @@ class SendDailySummaryToSlackTest extends TestCase
         Http::assertSentCount(1);
     }
 
-    public function testCommandDoesntSendIfWeekend(): void
+    public function testCommandDoesntSendMessageIfWeekend(): void
     {
         $weekend = Carbon::create(2022, 4, 23);
         $this->assertTrue($weekend->isWeekend());
@@ -51,7 +51,7 @@ class SendDailySummaryToSlackTest extends TestCase
         Http::assertNothingSent();
     }
 
-    public function testCommandDoesntSendIfHoliday(): void
+    public function testCommandDoesntSendMessageIfHoliday(): void
     {
         $holiday = Holiday::factory(["date" => Carbon::create(2022, 4, 22)])->create();