diff --git a/src/Tempest/Validation/src/Rules/IP.php b/src/Tempest/Validation/src/Rules/IP.php
index 9983b00a6..3847b78ff 100644
--- a/src/Tempest/Validation/src/Rules/IP.php
+++ b/src/Tempest/Validation/src/Rules/IP.php
@@ -16,16 +16,14 @@ public function __construct(
         private bool $allowPrivateRange = true,
         private bool $allowReservedRange = true,
     ) {
-        $options = 0;
-        $options = $options | FILTER_FLAG_IPV4;
-        $options = $options | FILTER_FLAG_IPV6;
+        $options = FILTER_FLAG_IPV4 | FILTER_FLAG_IPV6;
 
         if (! $this->allowPrivateRange) {
-            $options = $options | FILTER_FLAG_NO_PRIV_RANGE;
+            $options |= FILTER_FLAG_NO_PRIV_RANGE;
         }
 
         if (! $this->allowReservedRange) {
-            $options = $options | FILTER_FLAG_NO_RES_RANGE;
+            $options |= FILTER_FLAG_NO_RES_RANGE;
         }
 
         $this->options = $options;
diff --git a/src/Tempest/Validation/src/Rules/IPv4.php b/src/Tempest/Validation/src/Rules/IPv4.php
index c72b3bfd5..689a4eac4 100644
--- a/src/Tempest/Validation/src/Rules/IPv4.php
+++ b/src/Tempest/Validation/src/Rules/IPv4.php
@@ -16,15 +16,14 @@ public function __construct(
         private bool $allowPrivateRange = true,
         private bool $allowReservedRange = true,
     ) {
-        $options = 0;
-        $options = $options | FILTER_FLAG_IPV4;
+        $options = FILTER_FLAG_IPV4;
 
         if (! $this->allowPrivateRange) {
-            $options = $options | FILTER_FLAG_NO_PRIV_RANGE;
+            $options |= FILTER_FLAG_NO_PRIV_RANGE;
         }
 
         if (! $this->allowReservedRange) {
-            $options = $options | FILTER_FLAG_NO_RES_RANGE;
+            $options |= FILTER_FLAG_NO_RES_RANGE;
         }
 
         $this->options = $options;
diff --git a/src/Tempest/Validation/src/Rules/IPv6.php b/src/Tempest/Validation/src/Rules/IPv6.php
index 3b8033174..14f3dac33 100644
--- a/src/Tempest/Validation/src/Rules/IPv6.php
+++ b/src/Tempest/Validation/src/Rules/IPv6.php
@@ -16,15 +16,14 @@ public function __construct(
         private bool $allowPrivateRange = true,
         private bool $allowReservedRange = true,
     ) {
-        $options = 0;
-        $options = $options | FILTER_FLAG_IPV6;
+        $options = FILTER_FLAG_IPV6;
 
         if (! $this->allowPrivateRange) {
-            $options = $options | FILTER_FLAG_NO_PRIV_RANGE;
+            $options |= FILTER_FLAG_NO_PRIV_RANGE;
         }
 
         if (! $this->allowReservedRange) {
-            $options = $options | FILTER_FLAG_NO_RES_RANGE;
+            $options |= FILTER_FLAG_NO_RES_RANGE;
         }
 
         $this->options = $options;
diff --git a/src/Tempest/Validation/tests/Rules/IPv6Test.php b/src/Tempest/Validation/tests/Rules/IPv6Test.php
index 5ebb6eea0..416893ac9 100644
--- a/src/Tempest/Validation/tests/Rules/IPv6Test.php
+++ b/src/Tempest/Validation/tests/Rules/IPv6Test.php
@@ -39,14 +39,8 @@ public function test_ip_address_without_private_range(): void
 
     public function test_ip_address_without_reserved_range(): void
     {
-        if (PHP_OS_FAMILY === 'Windows') {
-            $this->markTestSkipped('Some kind of problem with Windows. Needs further investigation.');
-            /** @phpstan-ignore-next-line */
-            return;
-        }
-
         $rule = new IPv6(allowReservedRange: false);
-        $this->assertFalse($rule->isValid('2001:db8:ffff:ffff:ffff:ffff:ffff:ffff'));
+        $this->assertFalse($rule->isValid('::1'));
         $this->assertTrue($rule->isValid('2a03:b0c0:3:d0::11f5:3001'));
 
         $rule = new IPv6(allowReservedRange: true);