diff --git a/src/test/modules/test_extensions/meson.build b/src/test/modules/test_extensions/meson.build
index 698775b28d8..cbb8401579f 100644
--- a/src/test/modules/test_extensions/meson.build
+++ b/src/test/modules/test_extensions/meson.build
@@ -47,6 +47,6 @@ tests += {
       'test_extensions',
       'test_extdepend',
     ],
-    'regress_args': ['--no-locale', '--encoding=UTF8'],
+    'regress_args': ['--no-locale'],
   },
 }