diff --git a/tests/Features/Assignee.php b/tests/Features/Assignee.php
index e1ca639d..719ed1c7 100644
--- a/tests/Features/Assignee.php
+++ b/tests/Features/Assignee.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 beforeEach(function (): void {
     expect(true)->toBeTrue();
 })->assignee('nunomaduro');
diff --git a/tests/Features/Issue.php b/tests/Features/Issue.php
index 0210fb91..3bf3900b 100644
--- a/tests/Features/Issue.php
+++ b/tests/Features/Issue.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 beforeEach(function (): void {
     expect(true)->toBeTrue();
 })->issue(1);
diff --git a/tests/Features/Pr.php b/tests/Features/Pr.php
index 72df27cd..bb364141 100644
--- a/tests/Features/Pr.php
+++ b/tests/Features/Pr.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 beforeEach(function (): void {
     expect(true)->toBeTrue();
 })->pr(1);
diff --git a/tests/Features/Repeat.php b/tests/Features/Repeat.php
index 2a528126..2cfae99a 100644
--- a/tests/Features/Repeat.php
+++ b/tests/Features/Repeat.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 test('once', function (): void {
     expect(true)->toBeTrue();
 })->repeat(times: 1);
diff --git a/tests/Features/ThrowsNoExceptions.php b/tests/Features/ThrowsNoExceptions.php
index 60124198..ba8efb70 100644
--- a/tests/Features/ThrowsNoExceptions.php
+++ b/tests/Features/ThrowsNoExceptions.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 it('allows access to the underlying expectNotToPerformAssertions method', function (): void {
     $this->expectNotToPerformAssertions();
 
diff --git a/tests/Features/Ticket.php b/tests/Features/Ticket.php
index c06fef6e..dc634b3a 100644
--- a/tests/Features/Ticket.php
+++ b/tests/Features/Ticket.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 beforeEach(function (): void {
     expect(true)->toBeTrue();
 })->ticket(1);