B2B-2256: "countries" and "country" GraphQl query has no cache identity

Author: joanhe

dev/tests/api-functional/framework/Magento/TestFramework/TestCase/GraphQlAbstract.php

@@ -206,4 +206,18 @@ protected function assertResponseFields($actualResponse, $assertionMap)
             );
         }
     }
+
+    /**
+     * Tear down test and flush page cache
+     *
+     * @return void
+     */
+    protected function tearDown(): void
+    {
+        parent::tearDown();
+        $appDir = dirname(Bootstrap::getInstance()->getAppTempDir());
+        $out = '';
+        // phpcs:ignore Magento2.Security.InsecureFunction
+        exec("php -f {$appDir}/bin/magento cache:flush full_page", $out);
+    }
 }