diff --git a/phpstan.neon b/phpstan.neon
index a8c1c72c..482f97d7 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -14,6 +14,7 @@ parameters:
     - PHP_OS_FAMILY
   excludePaths:
       analyseAndScan:
+            - ./src/globals/ext-tests/decimal.php
             - ./src/globals/ext-tests/swoole.php
             - ./src/globals/ext-tests/swoole.phpt
             - ./src/globals/test-extensions.php