diff --git a/tests/phpunit/tests/comment/template.php b/tests/phpunit/tests/comment/template.php
index 68f98b5c8b..22283a5c2e 100644
--- a/tests/phpunit/tests/comment/template.php
+++ b/tests/phpunit/tests/comment/template.php
@@ -3,9 +3,24 @@
  * @group comment
  */
 class Tests_Comment_Template extends WP_UnitTestCase {
+	/**
+	 * Shared post ID.
+	 *
+	 * @var int
+	 */
+	public static $post_id;
+
+	/**
+	 * Set up shared fixtures.
+	 *
+	 * @param WP_UnitTest_Factory $factory Unit test factory.
+	 */
+	function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
+		self::$post_id = self::factory()->post->create();
+	}
 
 	function test_get_comments_number() {
-		$post_id = self::factory()->post->create();
+		$post_id = self::$post_id;
 
 		$this->assertSame( 0, get_comments_number( 0 ) );
 		$this->assertSame( '0', get_comments_number( $post_id ) );
@@ -18,7 +33,7 @@ class Tests_Comment_Template extends WP_UnitTestCase {
 	}
 
 	function test_get_comments_number_without_arg() {
-		$post_id   = self::factory()->post->create();
+		$post_id   = self::$post_id;
 		$permalink = get_permalink( $post_id );
 		$this->go_to( $permalink );
 
@@ -34,7 +49,7 @@ class Tests_Comment_Template extends WP_UnitTestCase {
 	 * @ticket 48772
 	 */
 	function test_get_comments_number_text_with_post_id() {
-		$post_id = $this->factory->post->create();
+		$post_id = self::$post_id;
 		$this->factory->comment->create_post_comments( $post_id, 6 );
 
 		$comments_number_text = get_comments_number_text( false, false, false, $post_id );
@@ -53,7 +68,7 @@ class Tests_Comment_Template extends WP_UnitTestCase {
 	 * @ticket 13651
 	 */
 	function test_get_comments_number_text_declension_with_default_args() {
-		$post_id   = $this->factory->post->create();
+		$post_id   = self::$post_id;
 		$permalink = get_permalink( $post_id );
 		$this->go_to( $permalink );
 
@@ -76,7 +91,7 @@ class Tests_Comment_Template extends WP_UnitTestCase {
 	 * @dataProvider data_get_comments_number_text_declension
 	 */
 	function test_get_comments_number_text_declension_with_custom_args( $number, $input, $output ) {
-		$post_id   = $this->factory->post->create();
+		$post_id   = self::$post_id;
 		$permalink = get_permalink( $post_id );
 
 		$this->factory->comment->create_post_comments( $post_id, $number );