diff --git a/tests/phpunit/tests/date/query.php b/tests/phpunit/tests/date/query.php
index 3ce905a291..99c6ca5389 100644
--- a/tests/phpunit/tests/date/query.php
+++ b/tests/phpunit/tests/date/query.php
@@ -975,8 +975,8 @@ class Tests_WP_Date_Query extends WP_UnitTestCase {
 	 * @ticket 31001
 	 */
 	public function test_validate_date_values_should_process_array_value_for_year() {
-		$p1 = $this->factory->post->create( array( 'post_date' => '2015-01-12' ) );
-		$p2 = $this->factory->post->create( array( 'post_date' => '2013-01-12' ) );
+		$p1 = $this->factory->post->create( array( 'post_date' => '2015-01-12 00:00:00' ) );
+		$p2 = $this->factory->post->create( array( 'post_date' => '2013-01-12 00:00:00' ) );
 
 		$q = new WP_Query( array(
 			'date_query' => array(
@@ -995,8 +995,8 @@ class Tests_WP_Date_Query extends WP_UnitTestCase {
 	 * @ticket 31001
 	 */
 	public function test_validate_date_values_should_process_array_value_for_day() {
-		$p1 = $this->factory->post->create( array( 'post_date' => '2015-01-12' ) );
-		$p2 = $this->factory->post->create( array( 'post_date' => '2015-01-10' ) );
+		$p1 = $this->factory->post->create( array( 'post_date' => '2015-01-12 00:00:00' ) );
+		$p2 = $this->factory->post->create( array( 'post_date' => '2015-01-10 00:00:00' ) );
 
 		$q = new WP_Query( array(
 			'date_query' => array(
@@ -1016,8 +1016,8 @@ class Tests_WP_Date_Query extends WP_UnitTestCase {
 	 * @expectedIncorrectUsage WP_Date_Query
 	 */
 	public function test_validate_date_values_should_process_array_value_for_day_when_values_are_invalid() {
-		$p1 = $this->factory->post->create( array( 'post_date' => '2015-01-12' ) );
-		$p2 = $this->factory->post->create( array( 'post_date' => '2015-01-10' ) );
+		$p1 = $this->factory->post->create( array( 'post_date' => '2015-01-12 00:00:00' ) );
+		$p2 = $this->factory->post->create( array( 'post_date' => '2015-01-10 00:00:00' ) );
 
 		$q = new WP_Query( array(
 			'date_query' => array(