diff --git a/Tests/Test/Constraint/BrowserCookieValueSameTest.php b/Tests/Test/Constraint/BrowserCookieValueSameTest.php
index caccd640..f2de26f9 100644
--- a/Tests/Test/Constraint/BrowserCookieValueSameTest.php
+++ b/Tests/Test/Constraint/BrowserCookieValueSameTest.php
@@ -21,7 +21,7 @@
 
 class BrowserCookieValueSameTest extends TestCase
 {
-    public function testConstraint(): void
+    public function testConstraint()
     {
         $browser = $this->getBrowser();
         $constraint = new BrowserCookieValueSame('foo', 'bar', false, '/path');
diff --git a/Tests/Test/Constraint/BrowserHasCookieTest.php b/Tests/Test/Constraint/BrowserHasCookieTest.php
index 87180efd..f6cb6d50 100644
--- a/Tests/Test/Constraint/BrowserHasCookieTest.php
+++ b/Tests/Test/Constraint/BrowserHasCookieTest.php
@@ -21,7 +21,7 @@
 
 class BrowserHasCookieTest extends TestCase
 {
-    public function testConstraint(): void
+    public function testConstraint()
     {
         $browser = $this->getBrowser();
         $constraint = new BrowserHasCookie('foo', '/path');
@@ -42,7 +42,7 @@ public function testConstraint(): void
         $this->fail();
     }
 
-    public function testConstraintWithWrongPath(): void
+    public function testConstraintWithWrongPath()
     {
         $browser = $this->getBrowser();
         $constraint = new BrowserHasCookie('foo', '/other');
@@ -57,7 +57,7 @@ public function testConstraintWithWrongPath(): void
         $this->fail();
     }
 
-    public function testConstraintWithWrongDomain(): void
+    public function testConstraintWithWrongDomain()
     {
         $browser = $this->getBrowser();
         $constraint = new BrowserHasCookie('foo', '/path', 'example.org');