diff --git a/phpunit/ApiTest.php b/phpunit/ApiTest.php
new file mode 100644
index 0000000..a060232
--- /dev/null
+++ b/phpunit/ApiTest.php
@@ -0,0 +1,44 @@
+<?php
+// use the phpunit framework
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test Query class
+ */
+final class ApiTest extends TestCase {
+
+	/**
+	 * Test the itwiki API with Category members
+	 */
+	public function testItWikiCategoryMembers() {
+
+		$queries =
+			itwiki()->createQuery( [
+				'action'  => 'query',
+				'list'    => 'categorymembers',
+				'cmtitle' => 'Categoria:Software con licenza GNU GPL',
+				'cmlimit' => 3,
+			] );
+
+		$i = 0;
+
+		foreach( $queries as $query ) {
+
+			foreach( $query->query->categorymembers as $member ) {
+
+				$member->pageid;
+				$member->ns;
+				$member->title;
+
+				$i++;
+			}
+
+			// don't do other requests
+			break;
+		}
+
+		// it should return just 3 elements for this series
+		$this->assertEquals( $i, 3 );
+	}
+
+}