diff --git a/t/lib-httpd/apache.conf b/t/lib-httpd/apache.conf
index 497b9b9d92..706799391b 100644
--- a/t/lib-httpd/apache.conf
+++ b/t/lib-httpd/apache.conf
@@ -80,6 +80,8 @@ PassEnv LSAN_OPTIONS
 PassEnv GIT_TRACE
 PassEnv GIT_CONFIG_NOSYSTEM
 PassEnv GIT_TEST_SIDEBAND_ALL
+PassEnv LANG
+PassEnv LC_ALL
 
 Alias /dumb/ www/
 Alias /auth/dumb/ www/auth/dumb/