diff --git a/tests/Unit/Helper/JsonLdBuilderLocalBusinessTest.php b/tests/Unit/Helper/JsonLdBuilderLocalBusinessTest.php
new file mode 100644
index 0000000..be1de69
--- /dev/null
+++ b/tests/Unit/Helper/JsonLdBuilderLocalBusinessTest.php
@@ -0,0 +1,93 @@
+<?php
+
+/**
+ * @package     MokoSuiteOpenGraph
+ * @subpackage  Tests
+ * @author      Moko Consulting <hello@mokoconsulting.tech>
+ * @copyright   Copyright (C) 2026 Moko Consulting. All rights reserved.
+ * @license     GNU General Public License version 3 or later; see LICENSE
+ */
+
+namespace Mokoconsulting\MokoOG\Tests\Unit\Helper;
+
+use Joomla\Plugin\System\MokoOG\Helper\JsonLdBuilder;
+use PHPUnit\Framework\TestCase;
+
+class JsonLdBuilderLocalBusinessTest extends TestCase
+{
+    /**
+     * Minimal Registry-like stand-in exposing get($key, $default).
+     */
+    private function params(array $data): object
+    {
+        return new class ($data) {
+            private array $data;
+
+            public function __construct(array $data)
+            {
+                $this->data = $data;
+            }
+
+            public function get($key, $default = null)
+            {
+                return $this->data[$key] ?? $default;
+            }
+        };
+    }
+
+    public function testReturnsNullWithoutName(): void
+    {
+        $this->assertNull(JsonLdBuilder::buildLocalBusiness($this->params([])));
+        $this->assertNull(JsonLdBuilder::buildLocalBusiness($this->params(['lb_name' => '   '])));
+    }
+
+    public function testMinimalSchemaHasNoOptionalKeys(): void
+    {
+        $result = JsonLdBuilder::buildLocalBusiness($this->params(['lb_name' => 'Acme Co']));
+
+        $this->assertSame('https://schema.org', $result['@context']);
+        $this->assertSame('LocalBusiness', $result['@type']);
+        $this->assertSame('Acme Co', $result['name']);
+        $this->assertArrayNotHasKey('address', $result);
+        $this->assertArrayNotHasKey('geo', $result);
+        $this->assertArrayNotHasKey('telephone', $result);
+    }
+
+    public function testCustomTypeAndPartialAddress(): void
+    {
+        $result = JsonLdBuilder::buildLocalBusiness($this->params([
+            'lb_name'    => 'Joe Pizza',
+            'lb_type'    => 'Restaurant',
+            'lb_street'  => '1 Main St',
+            'lb_city'    => 'Springfield',
+            'lb_country' => 'US',
+            'lb_phone'   => '+1-555-0100',
+        ]));
+
+        $this->assertSame('Restaurant', $result['@type']);
+        $this->assertSame('PostalAddress', $result['address']['@type']);
+        $this->assertSame('1 Main St', $result['address']['streetAddress']);
+        $this->assertSame('Springfield', $result['address']['addressLocality']);
+        $this->assertSame('US', $result['address']['addressCountry']);
+        $this->assertArrayNotHasKey('postalCode', $result['address']);
+        $this->assertSame('+1-555-0100', $result['telephone']);
+    }
+
+    public function testGeoRequiresBothCoordinates(): void
+    {
+        $partial = JsonLdBuilder::buildLocalBusiness($this->params([
+            'lb_name'     => 'X',
+            'lb_latitude' => '1.0',
+        ]));
+        $this->assertArrayNotHasKey('geo', $partial);
+
+        $full = JsonLdBuilder::buildLocalBusiness($this->params([
+            'lb_name'      => 'X',
+            'lb_latitude'  => '1.0',
+            'lb_longitude' => '2.0',
+        ]));
+        $this->assertSame('GeoCoordinates', $full['geo']['@type']);
+        $this->assertSame('1.0', $full['geo']['latitude']);
+        $this->assertSame('2.0', $full['geo']['longitude']);
+    }
+}
diff --git a/tests/Unit/Helper/JsonLdScriptTagTest.php b/tests/Unit/Helper/JsonLdScriptTagTest.php
new file mode 100644
index 0000000..757e484
--- /dev/null
+++ b/tests/Unit/Helper/JsonLdScriptTagTest.php
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * @package     MokoSuiteOpenGraph
+ * @subpackage  Tests
+ * @author      Moko Consulting <hello@mokoconsulting.tech>
+ * @copyright   Copyright (C) 2026 Moko Consulting. All rights reserved.
+ * @license     GNU General Public License version 3 or later; see LICENSE
+ */
+
+namespace Mokoconsulting\MokoOG\Tests\Unit\Helper;
+
+use Joomla\Plugin\System\MokoOG\Helper\JsonLdBuilder;
+use PHPUnit\Framework\TestCase;
+
+class JsonLdScriptTagTest extends TestCase
+{
+    private const OPEN  = '<script type="application/ld+json">';
+    private const CLOSE = '</script>';
+
+    private function body(string $output): string
+    {
+        return substr($output, \strlen(self::OPEN), -\strlen(self::CLOSE));
+    }
+
+    public function testWrapsInLdJsonScriptTag(): void
+    {
+        $out = JsonLdBuilder::toScriptTag(['@type' => 'Thing']);
+
+        $this->assertStringStartsWith(self::OPEN, $out);
+        $this->assertStringEndsWith(self::CLOSE, $out);
+    }
+
+    public function testEscapesClosingScriptInsideData(): void
+    {
+        $out  = JsonLdBuilder::toScriptTag(['name' => 'evil </script><script>alert(1)</script>']);
+        $body = $this->body($out);
+
+        // No raw "</" may survive inside the body — it would let content break out
+        // of the <script> block. The builder rewrites every "</" to "<\/".
+        $this->assertStringNotContainsString('</', $body);
+        $this->assertStringContainsString('<\\/', $body);
+    }
+
+    public function testBodyIsValidJsonAfterUnescaping(): void
+    {
+        $out  = JsonLdBuilder::toScriptTag(['@context' => 'https://schema.org', '@type' => 'Article']);
+        $json = str_replace('<\\/', '</', $this->body($out));
+
+        $decoded = json_decode($json, true);
+
+        $this->assertIsArray($decoded);
+        $this->assertSame('Article', $decoded['@type']);
+        $this->assertSame('https://schema.org', $decoded['@context']);
+    }
+}