diff --git a/tests/phpunit/tests/canonical.php b/tests/phpunit/tests/canonical.php
index 727c35e780238..424194acfe758 100644
--- a/tests/phpunit/tests/canonical.php
+++ b/tests/phpunit/tests/canonical.php
@@ -68,7 +68,7 @@ public function test_canonical( $test_url, $expected, $ticket = 0, $expected_doi
 		$this->assertCanonical( $test_url, $expected, $ticket, $expected_doing_it_wrong );
 	}
 
-	public function data_canonical() {
+	public static function data_canonical() {
 		/*
 		 * Data format:
 		 * [0]: Test URL.
@@ -345,7 +345,7 @@ public function test_redirect_guess_404_permalink_with_custom_statuses( $status_
 	 *    bool  Whether the 404 link is expected to redirect
 	 * }
 	 */
-	public function data_redirect_guess_404_permalink_with_custom_statuses() {
+	public static function data_redirect_guess_404_permalink_with_custom_statuses() {
 		return array(
 			'public status'                      => array(
 				'status_args' => array( 'public' => true ),
@@ -395,7 +395,7 @@ public function test_redirect_guess_404_permalink_post_types( $original_url, $ex
 	 *
 	 * @return array[]
 	 */
-	public function data_redirect_guess_404_permalink_post_types() {
+	public static function data_redirect_guess_404_permalink_post_types() {
 		return array(
 			'single string formatted post type'    => array(
 				'original_url' => '/?name=sample-pag&post_type=page',
@@ -673,7 +673,7 @@ public function test_canonical_attachment_page_redirect_with_option_disabled( $e
 	 *
 	 * @return array[]
 	 */
-	public function data_canonical_attachment_page_redirect_with_option_disabled() {
+	public static function data_canonical_attachment_page_redirect_with_option_disabled() {
 		return array(
 			'logged out user, no parent'      => array(
 				'%%attachment_url%%',