diff --git a/tests/queries/0_stateless/01889_sqlite_read_write.sh b/tests/queries/0_stateless/01889_sqlite_read_write.sh
index fd0a1df20ac..30496af46f6 100755
--- a/tests/queries/0_stateless/01889_sqlite_read_write.sh
+++ b/tests/queries/0_stateless/01889_sqlite_read_write.sh
@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-# Tags: no-fasttest
+# Tags: no-fasttest, no-parallel
+# no-parallel: dealing with an SQLite database makes concurrent SHOW TABLES queries fail sporadically with the "database is locked" error.
 
 CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 # shellcheck source=../shell_config.sh
diff --git a/tests/queries/0_stateless/02227_test_create_empty_sqlite_db.sh b/tests/queries/0_stateless/02227_test_create_empty_sqlite_db.sh
index 39ba17fc7eb..37fdde95ea7 100755
--- a/tests/queries/0_stateless/02227_test_create_empty_sqlite_db.sh
+++ b/tests/queries/0_stateless/02227_test_create_empty_sqlite_db.sh
@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-# Tags: no-fasttest
+# Tags: no-fasttest, no-parallel
+# no-parallel: dealing with an SQLite database makes concurrent SHOW TABLES queries fail sporadically with the "database is locked" error.
 
 CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 # shellcheck source=../shell_config.sh