diff --git a/src/test/regress/expected/jsonb.out b/src/test/regress/expected/jsonb.out
index 5a1eb18aba2..36c31c14576 100644
--- a/src/test/regress/expected/jsonb.out
+++ b/src/test/regress/expected/jsonb.out
@@ -3099,6 +3099,7 @@ SELECT count(*) FROM testjsonb WHERE j @? '$.bar';
      0
 (1 row)
 
+ALTER TABLE testjsonb SET (parallel_workers = 2);
 CREATE INDEX jidx ON testjsonb USING gin (j);
 SET enable_seqscan = off;
 SELECT count(*) FROM testjsonb WHERE j @> '{"wait":null}';
@@ -3475,7 +3476,7 @@ SELECT count(*) FROM testjsonb WHERE j = '{"pos":98, "line":371, "node":"CBA", "
 
 --gin path opclass
 DROP INDEX jidx;
-CREATE INDEX jidx ON testjsonb USING gin (j jsonb_path_ops);
+CREATE INDEX CONCURRENTLY jidx ON testjsonb USING gin (j jsonb_path_ops);
 SET enable_seqscan = off;
 SELECT count(*) FROM testjsonb WHERE j @> '{"wait":null}';
  count 
diff --git a/src/test/regress/expected/tsearch.out b/src/test/regress/expected/tsearch.out
index 9fad6c8b04b..9287c440709 100644
--- a/src/test/regress/expected/tsearch.out
+++ b/src/test/regress/expected/tsearch.out
@@ -870,6 +870,7 @@ RESET enable_seqscan;
 RESET enable_indexscan;
 RESET enable_bitmapscan;
 DROP INDEX wowidx;
+ALTER TABLE test_tsvector SET (parallel_workers = 2);
 CREATE INDEX wowidx ON test_tsvector USING gin (a);
 SET enable_seqscan=OFF;
 -- GIN only supports bitmapscan, so no need to test plain indexscan
diff --git a/src/test/regress/sql/jsonb.sql b/src/test/regress/sql/jsonb.sql
index 57c11acddfe..07295b46929 100644
--- a/src/test/regress/sql/jsonb.sql
+++ b/src/test/regress/sql/jsonb.sql
@@ -851,6 +851,7 @@ SELECT count(*) FROM testjsonb WHERE j @? '$';
 SELECT count(*) FROM testjsonb WHERE j @? '$.public';
 SELECT count(*) FROM testjsonb WHERE j @? '$.bar';
 
+ALTER TABLE testjsonb SET (parallel_workers = 2);
 CREATE INDEX jidx ON testjsonb USING gin (j);
 SET enable_seqscan = off;
 
@@ -939,7 +940,7 @@ SELECT count(*) FROM testjsonb WHERE j = '{"pos":98, "line":371, "node":"CBA", "
 
 --gin path opclass
 DROP INDEX jidx;
-CREATE INDEX jidx ON testjsonb USING gin (j jsonb_path_ops);
+CREATE INDEX CONCURRENTLY jidx ON testjsonb USING gin (j jsonb_path_ops);
 SET enable_seqscan = off;
 
 SELECT count(*) FROM testjsonb WHERE j @> '{"wait":null}';
diff --git a/src/test/regress/sql/tsearch.sql b/src/test/regress/sql/tsearch.sql
index fbd26cdba45..dc74aa0c889 100644
--- a/src/test/regress/sql/tsearch.sql
+++ b/src/test/regress/sql/tsearch.sql
@@ -222,6 +222,7 @@ RESET enable_bitmapscan;
 
 DROP INDEX wowidx;
 
+ALTER TABLE test_tsvector SET (parallel_workers = 2);
 CREATE INDEX wowidx ON test_tsvector USING gin (a);
 
 SET enable_seqscan=OFF;