diff --git a/src/Rdfalite/Tests/ThingTest.php b/src/Rdfalite/Tests/ThingTest.php
index 143bbb7..08a7282 100644
--- a/src/Rdfalite/Tests/ThingTest.php
+++ b/src/Rdfalite/Tests/ThingTest.php
@@ -79,6 +79,16 @@ public function testMinimumThing()
         $this->assertEquals(0, count($thing->getProperties()));
     }
 
+    /**
+     * Test the resource ID
+     */
+    public function testResourceId()
+    {
+        $thing = new Thing('Person', self::$schemaOrgVocabulary, 'bob');
+        $this->assertInstanceOf(Thing::class, $thing);
+        $this->assertEquals('bob', $thing->getId());
+    }
+
     /**
      * Test the thing instantiation with an invalid type
      *
@@ -143,7 +153,8 @@ public function testGetInvalidPropertyName()
     /**
      * Test adding children
      */
-    public function testAddChild() {
+    public function testAddChild()
+    {
         $thing = new Thing('Person', self::$schemaOrgVocabulary);
         $this->assertInstanceOf(Thing::class, $thing);
 
diff --git a/src/Rdfalite/Tests/VocabularyTest.php b/src/Rdfalite/Tests/VocabularyTest.php
index ff16b03..b446128 100644
--- a/src/Rdfalite/Tests/VocabularyTest.php
+++ b/src/Rdfalite/Tests/VocabularyTest.php
@@ -61,6 +61,7 @@ public function testVocabulary()
         $vocabulary = new Vocabulary(self::SCHEMA_ORG);
         $this->assertInstanceOf(Vocabulary::class, $vocabulary);
         $this->assertEquals(self::SCHEMA_ORG, $vocabulary->getUrl());
+        $this->assertEquals(self::SCHEMA_ORG.'/Person', $vocabulary->expand('Person'));
     }
 
     /**