diff --git a/tests/phpunit/tests/multisite/network.php b/tests/phpunit/tests/multisite/network.php
index 5ca1632469703..71e80383f2292 100644
--- a/tests/phpunit/tests/multisite/network.php
+++ b/tests/phpunit/tests/multisite/network.php
@@ -126,6 +126,8 @@ public function get_main_network_id() {
 		}
 
 		/**
+		 * Tests that the `WP_Network::$id` property is an integer.
+		 *
 		 * @ticket 37050
 		 *
 		 * @covers WP_Network::__get
@@ -139,10 +141,10 @@ public function test_wp_network_object_id_property_is_int() {
 		}
 
 		/**
-		 * Tests that the `WP_Network::$id` property is stored as int.
+		 * Tests that the `WP_Network::$id` property is stored as an integer.
 		 *
 		 * Uses reflection to access the private property.
-		 * Differs from using the public getter method, which casts to int.
+		 * Differs from using the public getter method, which casts to an integer.
 		 *
 		 * @ticket 62035
 		 *
@@ -160,6 +162,43 @@ public function test_wp_network_object_id_property_stored_as_int() {
 			$this->assertSame( (int) $id, $property->getValue( $network ) );
 		}
 
+		/**
+		 * Tests that the `WP_Network::$blog_id` property is a string.
+		 *
+		 * @ticket 62035
+		 *
+		 * @covers WP_Network::__get
+		 */
+		public function test_wp_network_object_blog_id_property_is_int() {
+			$id = self::factory()->network->create();
+
+			$network = WP_Network::get_instance( $id );
+
+			$this->assertIsString( $network->blog_id );
+		}
+
+		/**
+		 * Tests that the `WP_Network::$blog_id` property is stored as a string.
+		 *
+		 * Uses reflection to access the private property.
+		 * Differs from using the public getter method, which casts to a string.
+		 *
+		 * @ticket 62035
+		 *
+		 * @covers WP_Network::__construct
+		 */
+		public function test_wp_network_object_blog_id_property_stored_as_string() {
+			$id = self::factory()->network->create();
+
+			$network = WP_Network::get_instance( $id );
+
+			$reflection = new ReflectionObject( $network );
+			$property   = $reflection->getProperty( 'blog_id' );
+			$property->setAccessible( true );
+
+			$this->assertIsString( $property->getValue( $network ) );
+		}
+
 		/**
 		 * @ticket 22917
 		 */