diff --git a/src/test/regress/expected/isolation_copy_vs_all_on_mx.out b/src/test/regress/expected/isolation_copy_vs_all_on_mx.out
index 76f36a753..df895c250 100644
--- a/src/test/regress/expected/isolation_copy_vs_all_on_mx.out
+++ b/src/test/regress/expected/isolation_copy_vs_all_on_mx.out
@@ -290,3 +290,78 @@ stop_session_level_connection_to_node
 
 (1 row)
 
+
+starting permutation: s1-start-session-level-connection s1-begin-on-worker s1-copy s2-start-session-level-connection s2-worker-create-index-concurrently s1-commit-worker s2-stop-connection s3-select-count s1-stop-connection
+step s1-start-session-level-connection:
+        SELECT start_session_level_connection_to_node('localhost', 57637);
+
+start_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s1-begin-on-worker:
+        SELECT run_commands_on_session_level_connection_to_node('BEGIN');
+
+run_commands_on_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s1-copy:
+ SELECT run_commands_on_session_level_connection_to_node('COPY copy_table FROM PROGRAM ''echo 5, 50 && echo 6, 60 && echo 7, 70''WITH CSV');
+
+run_commands_on_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s2-start-session-level-connection:
+        SELECT start_session_level_connection_to_node('localhost', 57638);
+
+start_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s2-worker-create-index-concurrently:
+ SELECT run_commands_on_session_level_connection_to_node('CREATE INDEX CONCURRENTLY copy_table_index ON copy_table(id)');
+ <waiting ...>
+step s1-commit-worker: 
+ SELECT run_commands_on_session_level_connection_to_node('COMMIT');
+
+run_commands_on_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s2-worker-create-index-concurrently: <... completed>
+run_commands_on_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s2-stop-connection:
+        SELECT stop_session_level_connection_to_node();
+
+stop_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s3-select-count:
+ SELECT COUNT(*) FROM copy_table;
+
+count
+---------------------------------------------------------------------
+    8
+(1 row)
+
+step s1-stop-connection:
+ SELECT stop_session_level_connection_to_node();
+
+stop_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
diff --git a/src/test/regress/expected/isolation_drop_alter_index_select_for_update_on_mx.out b/src/test/regress/expected/isolation_drop_alter_index_select_for_update_on_mx.out
index ac67b311b..e05a59676 100644
--- a/src/test/regress/expected/isolation_drop_alter_index_select_for_update_on_mx.out
+++ b/src/test/regress/expected/isolation_drop_alter_index_select_for_update_on_mx.out
@@ -137,6 +137,72 @@ stop_session_level_connection_to_node
 (1 row)
 
 
+starting permutation: s1-start-session-level-connection s1-index-worker s2-start-session-level-connection s2-begin-on-worker s2-select-for-update s1-commit-worker s2-commit-worker s2-stop-connection
+step s1-start-session-level-connection:
+        SELECT start_session_level_connection_to_node('localhost', 57637);
+
+start_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s1-index-worker:
+ SELECT run_commands_on_session_level_connection_to_node('CREATE INDEX dist_table_index ON dist_table (id)');
+
+run_commands_on_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s2-start-session-level-connection:
+        SELECT start_session_level_connection_to_node('localhost', 57638);
+
+start_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s2-begin-on-worker:
+        SELECT run_commands_on_session_level_connection_to_node('BEGIN');
+
+run_commands_on_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s2-select-for-update:
+ SELECT run_commands_on_session_level_connection_to_node('SELECT * FROM dist_table WHERE id = 5 FOR UPDATE');
+
+run_commands_on_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s1-commit-worker:
+ SELECT run_commands_on_session_level_connection_to_node('COMMIT');
+
+run_commands_on_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s2-commit-worker:
+        SELECT run_commands_on_session_level_connection_to_node('COMMIT');
+
+run_commands_on_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+step s2-stop-connection:
+        SELECT stop_session_level_connection_to_node();
+
+stop_session_level_connection_to_node
+---------------------------------------------------------------------
+
+(1 row)
+
+
 starting permutation: s1-start-session-level-connection s1-begin-on-worker s1-select-for-update s2-start-session-level-connection s2-begin-on-worker s2-select-for-update s1-commit-worker s2-commit-worker s1-stop-connection s2-stop-connection
 step s1-start-session-level-connection:
         SELECT start_session_level_connection_to_node('localhost', 57637);
diff --git a/src/test/regress/spec/isolation_copy_vs_all_on_mx.spec b/src/test/regress/spec/isolation_copy_vs_all_on_mx.spec
index 2990bf5cd..2f4b702f6 100644
--- a/src/test/regress/spec/isolation_copy_vs_all_on_mx.spec
+++ b/src/test/regress/spec/isolation_copy_vs_all_on_mx.spec
@@ -83,6 +83,11 @@ step "s2-coordinator-create-index-concurrently"
 	CREATE INDEX CONCURRENTLY copy_table_index ON copy_table(id);
 }
 
+step "s2-worker-create-index-concurrently"
+{
+	SELECT run_commands_on_session_level_connection_to_node('CREATE INDEX CONCURRENTLY copy_table_index ON copy_table(id)');
+}
+
 step "s2-commit-worker"
 {
         SELECT run_commands_on_session_level_connection_to_node('COMMIT');
@@ -116,3 +121,4 @@ permutation "s1-start-session-level-connection" "s1-begin-on-worker" "s1-copy" "
 permutation "s1-start-session-level-connection" "s1-begin-on-worker" "s1-copy" "s2-begin" "s2-coordinator-drop" "s1-commit-worker" "s2-commit" "s1-stop-connection" "s3-select-count"
 permutation "s1-start-session-level-connection" "s1-begin-on-worker" "s1-copy" "s2-start-session-level-connection" "s2-begin-on-worker" "s2-select-for-update" "s1-commit-worker" "s2-commit-worker" "s1-stop-connection" "s2-stop-connection" "s3-select-count"
 permutation "s1-start-session-level-connection" "s1-begin-on-worker" "s1-copy" "s2-coordinator-create-index-concurrently" "s1-commit-worker" "s2-empty" "s3-select-count" "s1-stop-connection"
+permutation "s1-start-session-level-connection" "s1-begin-on-worker" "s1-copy" "s2-start-session-level-connection" "s2-worker-create-index-concurrently" "s1-commit-worker" "s2-stop-connection" "s3-select-count" "s1-stop-connection"
diff --git a/src/test/regress/spec/isolation_drop_alter_index_select_for_update_on_mx.spec b/src/test/regress/spec/isolation_drop_alter_index_select_for_update_on_mx.spec
index 9d4086ac1..cc816c693 100644
--- a/src/test/regress/spec/isolation_drop_alter_index_select_for_update_on_mx.spec
+++ b/src/test/regress/spec/isolation_drop_alter_index_select_for_update_on_mx.spec
@@ -43,6 +43,11 @@ step "s1-index"
 	CREATE INDEX dist_table_index ON dist_table (id);
 }
 
+step "s1-index-worker"
+{
+	SELECT run_commands_on_session_level_connection_to_node('CREATE INDEX dist_table_index ON dist_table (id)');
+}
+
 step "s1-select-for-update"
 {
 	SELECT run_commands_on_session_level_connection_to_node('SELECT * FROM dist_table WHERE id = 5 FOR UPDATE');
@@ -122,5 +127,6 @@ step "s3-select-count"
 
 permutation "s1-start-session-level-connection" "s1-begin-on-worker" "s1-insert" "s2-start-session-level-connection" "s2-begin-on-worker" "s2-alter" "s1-commit-worker" "s2-commit-worker" "s1-stop-connection" "s2-stop-connection" "s3-select-count"
 permutation "s1-begin" "s1-index" "s2-start-session-level-connection" "s2-begin-on-worker" "s2-select-for-update" "s1-commit" "s2-commit-worker" "s2-stop-connection"
+permutation "s1-start-session-level-connection" "s1-index-worker" "s2-start-session-level-connection" "s2-begin-on-worker" "s2-select-for-update" "s1-commit-worker" "s2-commit-worker" "s2-stop-connection"
 permutation "s1-start-session-level-connection" "s1-begin-on-worker" "s1-select-for-update" "s2-start-session-level-connection" "s2-begin-on-worker" "s2-select-for-update" "s1-commit-worker" "s2-commit-worker" "s1-stop-connection" "s2-stop-connection"
 permutation "s1-start-session-level-connection" "s1-begin-on-worker" "s1-select-for-update" "s2-coordinator-create-index-concurrently"(*) "s2-empty" "s1-commit-worker" "s1-stop-connection"