diff --git a/php/Tests.php b/php/Tests.php
index dee4e4d..65dc131 100644
--- a/php/Tests.php
+++ b/php/Tests.php
@@ -2,12 +2,12 @@
 
 use PHPUnit\Framework\TestCase;
 
+require_once __DIR__ . '/code.php';
+
 class Tests extends TestCase
 {
     public function testSkeleton()
     {
-        $this->assertSame(true, false);
+        $this->assertSame("Hi there!", greeting());
     }
 }
-
-?>
\ No newline at end of file
diff --git a/php/code.php b/php/code.php
index ca8fd95..05ca84e 100644
--- a/php/code.php
+++ b/php/code.php
@@ -1,9 +1,9 @@
 <?php
 
-function test() {
-    echo "Hi there!\n";
+function greeting(): string {
+    return "Hi there!";
 }
 
-test();
-
-?>
\ No newline at end of file
+if (basename(__FILE__) === basename($_SERVER['SCRIPT_FILENAME'] ?? '')) {
+    echo greeting() . "\n";
+}