diff --git a/src/test/regress/pg_regress.c b/src/test/regress/pg_regress.c
index 330cd21894366d24c50bdf7c0a8559f58180ee85..c6bfbdce16427c359bdf075a99f390c679da3d9b 100644
--- a/src/test/regress/pg_regress.c
+++ b/src/test/regress/pg_regress.c
@@ -11,7 +11,7 @@
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/test/regress/pg_regress.c,v 1.65 2009/11/14 15:39:36 mha Exp $
+ * $PostgreSQL: pgsql/src/test/regress/pg_regress.c,v 1.66 2009/11/22 17:54:23 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -66,8 +66,8 @@ static char *shellprog = SHELLPROG;
 #endif
 
 /* currently we can use the same diff switches on all platforms */
-const char *basic_diff_opts = "-w";
-const char *pretty_diff_opts = "-w -C3";
+const char *basic_diff_opts = "";
+const char *pretty_diff_opts = "-C3";
 
 /* options settable from command line */
 _stringlist *dblist = NULL;