diff --git a/tests/phpunit/tests/option/networkOption.php b/tests/phpunit/tests/option/networkOption.php
index 1e0bd71b97..4ac33b820d 100644
--- a/tests/phpunit/tests/option/networkOption.php
+++ b/tests/phpunit/tests/option/networkOption.php
@@ -1,9 +1,10 @@
 <?php
 
-if ( is_multisite() ) :
-
 /**
- * Tests specific to network options in Multisite.
+ * Tests specific to managing network options in multisite.
+ *
+ * Some tests will run in single site as the `_network_option()` functions
+ * are available and internally use `_option()` functions as fallbacks.
  *
  * @group option
  * @group ms-option
@@ -11,6 +12,10 @@ if ( is_multisite() ) :
  */
 class Tests_Option_NetworkOption extends WP_UnitTestCase {
 	function test_add_network_option_not_available_on_other_network() {
+		if ( ! is_multisite() ) {
+			$this->markTestSkipped( 'Test requires multisite' );
+		}
+
 		$id = self::factory()->network->create();
 		$option = rand_str();
 		$value = rand_str();
@@ -20,6 +25,10 @@ class Tests_Option_NetworkOption extends WP_UnitTestCase {
 	}
 
 	function test_add_network_option_available_on_same_network() {
+		if ( ! is_multisite() ) {
+			$this->markTestSkipped( 'Test requires multisite' );
+		}
+
 		$id = self::factory()->network->create();
 		$option = rand_str();
 		$value = rand_str();
@@ -29,6 +38,10 @@ class Tests_Option_NetworkOption extends WP_UnitTestCase {
 	}
 
 	function test_delete_network_option_on_only_one_network() {
+		if ( ! is_multisite() ) {
+			$this->markTestSkipped( 'Test requires multisite' );
+		}
+
 		$id = self::factory()->network->create();
 		$option = rand_str();
 		$value = rand_str();
@@ -83,5 +96,3 @@ class Tests_Option_NetworkOption extends WP_UnitTestCase {
 		);
 	}
 }
-
-endif;
\ No newline at end of file