diff --git a/src/test/modules/test_oat_hooks/Makefile b/src/test/modules/test_oat_hooks/Makefile
index d1d874be79e..2b5d2687f8d 100644
--- a/src/test/modules/test_oat_hooks/Makefile
+++ b/src/test/modules/test_oat_hooks/Makefile
@@ -10,6 +10,9 @@ REGRESS = test_oat_hooks
 
 # disable installcheck for now
 NO_INSTALLCHECK = 1
+# and also for now force NO_LOCALE and UTF8
+ENCODING = UTF8
+NO_LOCALE = 1
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config