diff --git a/tests/ReturnTypeDeclarationSniffTest.php b/tests/Sniffs/ReturnTypeDeclarationSniffTest.php
similarity index 59%
rename from tests/ReturnTypeDeclarationSniffTest.php
rename to tests/Sniffs/ReturnTypeDeclarationSniffTest.php
index c3b81133..ad687918 100644
--- a/tests/ReturnTypeDeclarationSniffTest.php
+++ b/tests/Sniffs/ReturnTypeDeclarationSniffTest.php
@@ -12,40 +12,22 @@
  * @since      Class available since Release 5.4.0
  */
 
-namespace Bartlett\Tests\CompatInfo;
-
-use Bartlett\CompatInfo\Analyser\CompatibilityAnalyser;
-use Bartlett\Reflect\Client;
+namespace Bartlett\Tests\CompatInfo\Sniffs;
 
 /**
  * @link https://wiki.php.net/rfc/return_types
  * @link https://www.php.net/manual/en/migration70.new-features.php#migration70.new-features.return-type-declarations
  */
-final class ReturnTypeDeclarationSniffTest extends \PHPUnit\Framework\TestCase
+final class ReturnTypeDeclarationSniffTest extends SniffTestCase
 {
-    protected static $fixtures;
-    protected static $analyserId;
-    protected static $api;
-
     /**
-     * Sets up the shared fixture.
-     *
-     * @return void
+     * {@inheritDoc}
      */
     public static function setUpBeforeClass(): void
     {
-        self::$fixtures = __DIR__ . DIRECTORY_SEPARATOR
-            . 'fixtures' . DIRECTORY_SEPARATOR
-            . 'sniffs' . DIRECTORY_SEPARATOR
-            . 'functions' . DIRECTORY_SEPARATOR
-        ;
+        parent::setUpBeforeClass();
 
-        self::$analyserId = CompatibilityAnalyser::class;
-
-        $client = new Client();
-
-        // request for a Bartlett\Reflect\Api\Analyser
-        self::$api = $client->api('analyser');
+        self::$fixtures .= 'functions' . DIRECTORY_SEPARATOR;
     }
 
     /**
@@ -73,4 +55,30 @@ public function testReturnTypeHint()
             $versions
         );
     }
+
+    /**
+     * Regression test for nullable return type hint declaration detection GH#273
+     *
+     * @link https://github.com/llaville/php-compat-info/issues/273
+     *       PHP 7.1 Nullable types not being detected
+     * @group features
+     * @group regression
+     * @return void
+     */
+    public function testNullableReturnTypeHint()
+    {
+        $dataSource = self::$fixtures . 'gh273.php';
+        $analysers  = ['compatibility'];
+        $metrics    = self::$api->run($dataSource, $analysers);
+        $versions   = $metrics[self::$analyserId]['versions'];
+
+        $this->assertEquals(
+            [
+                'php.min'      => '7.1.0',
+                'php.max'      => '',
+                'php.all'      => '7.1.0',
+            ],
+            $versions
+        );
+    }
 }
diff --git a/tests/Sniffs/SniffTestCase.php b/tests/Sniffs/SniffTestCase.php
new file mode 100644
index 00000000..3c7dc2ad
--- /dev/null
+++ b/tests/Sniffs/SniffTestCase.php
@@ -0,0 +1,33 @@
+<?php declare(strict_types=1);
+
+namespace Bartlett\Tests\CompatInfo\Sniffs;
+
+use Bartlett\CompatInfo\Analyser\CompatibilityAnalyser;
+use Bartlett\CompatInfo\Client;
+
+abstract class SniffTestCase extends \PHPUnit\Framework\TestCase
+{
+    protected static $fixtures;
+    protected static $analyserId;
+    protected static $api;
+
+    /**
+     * Sets up the shared fixture.
+     *
+     * @return void
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$fixtures = dirname(__DIR__) . DIRECTORY_SEPARATOR
+            . 'fixtures' . DIRECTORY_SEPARATOR
+            . 'sniffs' . DIRECTORY_SEPARATOR
+        ;
+
+        self::$analyserId = CompatibilityAnalyser::class;
+
+        $client = new Client();
+
+        // request for a Bartlett\CompatInfo\Api\Analyser
+        self::$api = $client->api('analyser');
+    }
+}
diff --git a/tests/fixtures/gh273.php b/tests/fixtures/sniffs/functions/gh273.php
similarity index 100%
rename from tests/fixtures/gh273.php
rename to tests/fixtures/sniffs/functions/gh273.php