diff --git a/src/test/regress/parallel_schedule_oriole b/src/test/regress/parallel_schedule_oriole
index dfd35775913..ad10b0a8e41 100644
--- a/src/test/regress/parallel_schedule_oriole
+++ b/src/test/regress/parallel_schedule_oriole
@@ -43,6 +43,7 @@ test: copy copyselect copydml
 # Note: many of the tests in later groups depend on create_index
 # ----------
 test: create_function_c create_misc create_operator create_procedure create_type create_schema create_view
+test: create_index
 
 # ----------
 # Another group of parallel tests
@@ -104,7 +105,7 @@ test: json_encoding jsonpath jsonpath_encoding jsonb_jsonpath sqljson sqljson_qu
 # NB: temp.sql does a reconnect which transiently uses 2 connections,
 # so keep this parallel group to at most 19 tests
 # ----------
-test: plancache rangefuncs prepare sequence polymorphism largeobject xml
+test: plancache rangefuncs prepare alter_table sequence polymorphism largeobject xml
 
 # ----------
 # Another group of parallel tests
diff --git a/src/test/regress/pg_regress.c b/src/test/regress/pg_regress.c
index fc8ad4c36dc..53435c47420 100644
--- a/src/test/regress/pg_regress.c
+++ b/src/test/regress/pg_regress.c
@@ -62,8 +62,8 @@ static char *shellprog = SHELLPROG;
  * Windows-style newlines, but the comparison files might or might not.
  */
 #ifndef WIN32
-const char *basic_diff_opts = "-I \"NOTICE\" -I \"DETAIL\" -I \"WARNING\"";
-const char *pretty_diff_opts = "-I \"NOTICE\" -I \"DETAIL\" -I \"WARNING\" -U3";
+const char *basic_diff_opts = "";
+const char *pretty_diff_opts = "-U3";
 #else
 const char *basic_diff_opts = "--strip-trailing-cr";
 const char *pretty_diff_opts = "--strip-trailing-cr -U3";