diff --git a/moto/rds/models.py b/moto/rds/models.py
index 7e9bfb7f1bb3..1772cc7a2935 100644
--- a/moto/rds/models.py
+++ b/moto/rds/models.py
@@ -389,6 +389,7 @@ def __init__(
         db_cluster_identifier: str,
         engine: str,
         allocated_storage: Optional[int] = None,
+        auto_minor_version_upgrade: bool = True,
         engine_version: Optional[str] = None,
         master_username: Optional[str] = None,
         master_user_password: Optional[str] = None,
@@ -413,6 +414,7 @@ def __init__(
         self.database_name = database_name
         self.db_cluster_identifier = db_cluster_identifier
         self.db_cluster_instance_class = kwargs.get("db_cluster_instance_class")
+        self.auto_minor_version_upgrade = auto_minor_version_upgrade
         self.deletion_protection = deletion_protection
         self.engine = engine
         if self.engine not in ClusterEngine.list_cluster_engines():
diff --git a/moto/timestreamwrite/responses.py b/moto/timestreamwrite/responses.py
index 2c4ff9ed8017..492e1fc16cbd 100644
--- a/moto/timestreamwrite/responses.py
+++ b/moto/timestreamwrite/responses.py
@@ -1,9 +1,10 @@
 import json
+from typing import Iterable
 
 from moto.core.responses import BaseResponse
 from moto.timestreamquery.models import TimestreamQueryBackend, timestreamquery_backends
 
-from .models import TimestreamWriteBackend, timestreamwrite_backends
+from .models import TimestreamTable, TimestreamWriteBackend, timestreamwrite_backends
 
 
 class TimestreamWriteResponse(BaseResponse):
@@ -85,7 +86,12 @@ def describe_table(self) -> str:
 
     def list_tables(self) -> str:
         database_name = self._get_param("DatabaseName")
-        tables = self.timestreamwrite_backend.list_tables(database_name)
+        if database_name is None:
+            tables: Iterable[TimestreamTable] = []
+            for db in self.timestreamwrite_backend.list_databases():
+                tables = list(tables) + list(db.list_tables())
+        else:
+            tables = self.timestreamwrite_backend.list_tables(database_name)
         return json.dumps(dict(Tables=[t.description() for t in tables]))
 
     def update_table(self) -> str:
diff --git a/tests/test_rds/test_rds.py b/tests/test_rds/test_rds.py
index 5763cc82208e..d993b055eabe 100644
--- a/tests/test_rds/test_rds.py
+++ b/tests/test_rds/test_rds.py
@@ -61,6 +61,7 @@ def test_create_database(client):
         DBSecurityGroups=["my_sg"],
         VpcSecurityGroupIds=["sg-123456"],
         EnableCloudwatchLogsExports=["audit", "error"],
+        AutoMinorVersionUpgrade=False,
     )
     db_instance = database["DBInstance"]
     assert db_instance["AllocatedStorage"] == 10
@@ -83,6 +84,7 @@ def test_create_database(client):
     assert db_instance["EnabledCloudwatchLogsExports"] == ["audit", "error"]
     assert db_instance["Endpoint"]["Port"] == 1234
     assert db_instance["DbInstancePort"] == 1234
+    assert db_instance["AutoMinorVersionUpgrade"] is False
 
 
 @mock_aws
diff --git a/tests/test_rds/test_rds_clusters.py b/tests/test_rds/test_rds_clusters.py
index 9f1885db89b3..ba94a8b30b71 100644
--- a/tests/test_rds/test_rds_clusters.py
+++ b/tests/test_rds/test_rds_clusters.py
@@ -337,10 +337,13 @@ def test_create_db_cluster_additional_parameters(client):
         },
         VpcSecurityGroupIds=["sg1", "sg2"],
         EnableIAMDatabaseAuthentication=True,
+        AutoMinorVersionUpgrade=False,
     )
 
     cluster = resp["DBCluster"]
 
+    assert cluster["AutoMinorVersionUpgrade"] is False
+    assert cluster["DBClusterIdentifier"] == "cluster-id"
     assert cluster["AvailabilityZones"] == ["eu-north-1b"]
     assert cluster["DatabaseName"] == "users"
     assert cluster["Engine"] == "aurora-postgresql"
diff --git a/tests/test_timestreamwrite/test_timestreamwrite_table.py b/tests/test_timestreamwrite/test_timestreamwrite_table.py
index 38ddd40b852b..e5a077c23cf4 100644
--- a/tests/test_timestreamwrite/test_timestreamwrite_table.py
+++ b/tests/test_timestreamwrite/test_timestreamwrite_table.py
@@ -198,6 +198,39 @@ def test_create_multiple_tables():
     assert {t["TableStatus"] for t in tables} == {"ACTIVE"}
 
 
+@mock_aws
+def test_list_tables_without_database():
+    ts = boto3.client("timestream-write", region_name="us-east-1")
+    ts.create_database(DatabaseName="mydatabase")
+
+    for idx in range(0, 5):
+        ts.create_table(
+            DatabaseName="mydatabase",
+            TableName=f"mytable_{idx}",
+            RetentionProperties={
+                "MemoryStoreRetentionPeriodInHours": 7,
+                "MagneticStoreRetentionPeriodInDays": 42,
+            },
+        )
+
+    database = ts.describe_database(DatabaseName="mydatabase")["Database"]
+
+    assert database["TableCount"] == 5
+
+    # database_name is optional in api call
+    tables = ts.list_tables()["Tables"]
+    assert len(tables) == 5
+    assert {t["DatabaseName"] for t in tables} == {"mydatabase"}
+    assert {t["TableName"] for t in tables} == {
+        "mytable_0",
+        "mytable_1",
+        "mytable_2",
+        "mytable_3",
+        "mytable_4",
+    }
+    assert {t["TableStatus"] for t in tables} == {"ACTIVE"}
+
+
 @mock_aws
 def test_delete_table():
     ts = boto3.client("timestream-write", region_name="us-east-1")