diff --git a/tests/unit/Handshake/RequestVerifierTest.php b/tests/unit/Handshake/RequestVerifierTest.php
index e6dea0e..5ba26b6 100644
--- a/tests/unit/Handshake/RequestVerifierTest.php
+++ b/tests/unit/Handshake/RequestVerifierTest.php
@@ -14,7 +14,7 @@ class RequestVerifierTest extends TestCase {
      */
     protected $_v;
 
-    public function setUp() : void {
+    public function setUp() {
         $this->_v = new RequestVerifier();
     }
 
diff --git a/tests/unit/Handshake/ResponseVerifierTest.php b/tests/unit/Handshake/ResponseVerifierTest.php
index b916005..0ca18e3 100644
--- a/tests/unit/Handshake/ResponseVerifierTest.php
+++ b/tests/unit/Handshake/ResponseVerifierTest.php
@@ -14,7 +14,7 @@ class ResponseVerifierTest extends TestCase {
      */
     protected $_v;
 
-    public function setUp() : void {
+    public function setUp() {
         $this->_v = new ResponseVerifier;
     }