diff --git a/src/test/regress/pg_regress.c b/src/test/regress/pg_regress.c
index 2e58895066..b685aeb1fa 100644
--- a/src/test/regress/pg_regress.c
+++ b/src/test/regress/pg_regress.c
@@ -1933,8 +1933,9 @@ create_database(const char *dbname)
 				 "ALTER DATABASE \"%s\" SET lc_monetary TO 'C';"
 				 "ALTER DATABASE \"%s\" SET lc_numeric TO 'C';"
 				 "ALTER DATABASE \"%s\" SET lc_time TO 'C';"
+				 "ALTER DATABASE \"%s\" SET bytea_output TO 'hex';"
 			"ALTER DATABASE \"%s\" SET timezone_abbreviations TO 'Default';",
-				 dbname, dbname, dbname, dbname, dbname);
+				 dbname, dbname, dbname, dbname, dbname, dbname);
 
 	/*
 	 * Install any requested procedural languages.  We use CREATE OR REPLACE