diff --git a/tests/class-test-content-security-policies.php b/tests/class-test-content-security-policies.php
index dc28242..8120d94 100644
--- a/tests/class-test-content-security-policies.php
+++ b/tests/class-test-content-security-policies.php
@@ -5,7 +5,7 @@
 use WP_UnitTestCase;
 
 class Test_Content_Security_Policies extends WP_UnitTestCase {
-	function setUp() {
+	function setUp(): void {
 		Output::reset();
 		parent::setUp();
 	}
diff --git a/tests/class-test-rest-allow-origins.php b/tests/class-test-rest-allow-origins.php
index 3f7e4e9..e06c437 100644
--- a/tests/class-test-rest-allow-origins.php
+++ b/tests/class-test-rest-allow-origins.php
@@ -7,7 +7,7 @@
 
 class Test_Rest_Allow_Origins extends WP_UnitTestCase {
 
-	function setUp() {
+	function setUp(): void {
 		parent::setUp();
 	}