diff --git a/tests/functional/SecureShellExceptionCest.php b/tests/functional/SecureShellExceptionCest.php
index 9bd1652..3aea12c 100644
--- a/tests/functional/SecureShellExceptionCest.php
+++ b/tests/functional/SecureShellExceptionCest.php
@@ -28,6 +28,20 @@ public function openConnectionAuthTypeError(FunctionalTester $I)
         });
     }
 
+    /**
+     * @env nochecking
+     */
+    public function openConnectionAuthError(FunctionalTester $I)
+    {
+        $I->expectException(ModuleException::class, function () use ($I) {
+            $I->openConnection('localhost',
+                                32768,
+                                SecureShell::AUTH_PASSWORD,
+                                'root',
+                                'invalid');
+        });
+    }
+
     /**
      * @env nochecking
      */