diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index cd54a34324..04d624af2f 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -3451,7 +3451,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	}
 
 	if ( empty( $data['post_name'] ) && ! in_array( $data['post_status'], array( 'draft', 'pending', 'auto-draft' ) ) ) {
-		$data['post_name'] = sanitize_title( $data['post_title'], $post_ID );
+		$data['post_name'] = wp_unique_post_slug( sanitize_title( $data['post_title'], $post_ID ), $post_ID, $data['post_status'], $post_type, $post_parent );
 		$wpdb->update( $wpdb->posts, array( 'post_name' => $data['post_name'] ), $where );
 	}
 
diff --git a/tests/phpunit/tests/post.php b/tests/phpunit/tests/post.php
index 2122d03599..22310c0aad 100644
--- a/tests/phpunit/tests/post.php
+++ b/tests/phpunit/tests/post.php
@@ -411,6 +411,29 @@ class Tests_Post extends WP_UnitTestCase {
 		$this->assertEquals(false, $this->_next_schedule_for_post('publish_future_post', $id));
 	}
 
+	/**
+	 * @ticket 5305
+	 */
+	public function test_wp_insert_post_should_not_allow_a_bare_numeric_slug_that_might_conflict_with_a_date_archive_when_generating_from_an_empty_post_title() {
+		global $wp_rewrite;
+		$wp_rewrite->init();
+		$wp_rewrite->set_permalink_structure( '/%postname%/' );
+		$wp_rewrite->flush_rules();
+
+		$p = wp_insert_post( array(
+			'post_title' => '',
+			'post_content' => 'test',
+			'post_status' => 'publish',
+			'post_type' => 'post',
+		) );
+
+		$post = get_post( $p );
+
+		$wp_rewrite->set_permalink_structure( '' );
+
+		$this->assertEquals( "$p-2", $post->post_name );
+	}
+
 	/**
 	 * @ticket 5364
 	 */