diff --git a/ydb/core/kqp/ut/federated_query/s3/kqp_s3_plan_ut.cpp b/ydb/core/kqp/ut/federated_query/s3/kqp_s3_plan_ut.cpp
index 3b66d3c89ef6..5c38627e0a62 100644
--- a/ydb/core/kqp/ut/federated_query/s3/kqp_s3_plan_ut.cpp
+++ b/ydb/core/kqp/ut/federated_query/s3/kqp_s3_plan_ut.cpp
@@ -167,7 +167,10 @@ Y_UNIT_TEST_SUITE(KqpS3PlanTest) {
             UploadObject("test_ctas_read", "test_ctas_read2", TEST_CONTENT, s3Client);
         }
 
-        auto kikimr = NTestUtils::MakeKikimrRunner();
+        NKikimrConfig::TAppConfig appConfig;
+        appConfig.MutableTableServiceConfig()->SetEnableOlapSink(true);
+        appConfig.MutableTableServiceConfig()->SetEnableCreateTableAs(true);
+        auto kikimr = NTestUtils::MakeKikimrRunner(appConfig);
 
         auto tc = kikimr->GetTableClient();
         auto session = tc.CreateSession().GetValueSync().GetSession();
diff --git a/ydb/core/kqp/ut/olap/kqp_olap_ut.cpp b/ydb/core/kqp/ut/olap/kqp_olap_ut.cpp
index aee2c5520964..db29505f48dc 100644
--- a/ydb/core/kqp/ut/olap/kqp_olap_ut.cpp
+++ b/ydb/core/kqp/ut/olap/kqp_olap_ut.cpp
@@ -3130,6 +3130,7 @@ Y_UNIT_TEST_SUITE(KqpOlap) {
 
     Y_UNIT_TEST(InsertIntoNullablePK) {
         NKikimrConfig::TAppConfig appConfig;
+        appConfig.MutableTableServiceConfig()->SetEnableOlapSink(true);
         appConfig.MutableColumnShardConfig()->SetAllowNullableColumnsInPK(true);
         auto settings = TKikimrSettings().SetAppConfig(appConfig).SetWithSampleTables(false);
         TTestHelper testHelper(settings);
@@ -3178,6 +3179,7 @@ Y_UNIT_TEST_SUITE(KqpOlap) {
 
     Y_UNIT_TEST(InsertEmptyString) {
         NKikimrConfig::TAppConfig appConfig;
+        appConfig.MutableTableServiceConfig()->SetEnableOlapSink(true);
         appConfig.MutableColumnShardConfig()->SetAllowNullableColumnsInPK(true);
         auto settings = TKikimrSettings().SetAppConfig(appConfig).SetWithSampleTables(false);
         TTestHelper testHelper(settings);
diff --git a/ydb/core/kqp/ut/olap/locks_ut.cpp b/ydb/core/kqp/ut/olap/locks_ut.cpp
index 5c89d2abae31..5c476dd71f2a 100644
--- a/ydb/core/kqp/ut/olap/locks_ut.cpp
+++ b/ydb/core/kqp/ut/olap/locks_ut.cpp
@@ -105,6 +105,7 @@ Y_UNIT_TEST_SUITE(KqpOlapLocks) {
         auto csController = NYDBTest::TControllers::RegisterCSControllerGuard<NYDBTest::NColumnShard::TController>();
 
         NKikimrConfig::TAppConfig appConfig;
+        appConfig.MutableTableServiceConfig()->SetEnableOlapSink(true);
         auto settings = TKikimrSettings().SetAppConfig(appConfig).SetWithSampleTables(false);
         TTestHelper testHelper(settings);
 
diff --git a/ydb/core/kqp/ut/scheme/kqp_acl_ut.cpp b/ydb/core/kqp/ut/scheme/kqp_acl_ut.cpp
index 7a39a4be9c90..15f954355ca6 100644
--- a/ydb/core/kqp/ut/scheme/kqp_acl_ut.cpp
+++ b/ydb/core/kqp/ut/scheme/kqp_acl_ut.cpp
@@ -217,8 +217,10 @@ Y_UNIT_TEST_SUITE(KqpAcl) {
                 primary key (id)
             ) WITH (STORE=%s);
         )", isOlap ? "COLUMN" : "ROW");
-    
-        TKikimrRunner kikimr;
+        NKikimrConfig::TAppConfig appConfig;
+        appConfig.MutableTableServiceConfig()->SetEnableOlapSink(true);
+        auto settings = NKqp::TKikimrSettings().SetAppConfig(appConfig);
+        TKikimrRunner kikimr(appConfig);
 
         {
             auto driverConfig = TDriverConfig()
diff --git a/ydb/core/protos/table_service_config.proto b/ydb/core/protos/table_service_config.proto
index 6aab3ffd0839..f631f2fd9187 100644
--- a/ydb/core/protos/table_service_config.proto
+++ b/ydb/core/protos/table_service_config.proto
@@ -285,10 +285,10 @@ message TTableServiceConfig {
 
     optional uint64 ExtractPredicateRangesLimit = 54 [default = 10000];
 
-    optional bool EnableOlapSink = 55 [default = true];
+    optional bool EnableOlapSink = 55 [default = false];
 
     optional bool EnablePerStatementQueryExecution = 56 [default = false];
-    optional bool EnableCreateTableAs = 57 [default = true];
+    optional bool EnableCreateTableAs = 57 [default = false];
 
     optional uint64 IdxLookupJoinPointsLimit = 58 [default = 3];
     reserved 59; //optional bool OldLookupJoinBehaviour = 59 [default = false];
@@ -310,9 +310,9 @@ message TTableServiceConfig {
 
     optional bool EnableConstantFolding = 65 [ default = true ];
 
-    optional bool EnableImplicitQueryParameterTypes = 66 [ default = true ];
+    optional bool EnableImplicitQueryParameterTypes = 66 [ default = false ];
 
-    optional string EnableSpillingNodes = 67 [ default = "All" ];
+    optional string EnableSpillingNodes = 67 [ default = "None" ];
 
     message TComputeSchedulerSettings {
         optional uint64 AdvanceTimeIntervalUsec = 1 [default = 500000];
@@ -325,7 +325,7 @@ message TTableServiceConfig {
 
     optional bool EnableRowsDuplicationCheck = 69 [ default = false ];
 
-    optional bool EnableHtapTx = 71 [default = true];
+    optional bool EnableHtapTx = 71 [default = false];
 
     message TWriteActorSettings {
         optional uint64 InFlightMemoryLimitPerActorBytes = 1 [ default = 67108864 ];
diff --git a/ydb/tests/library/harness/kikimr_config.py b/ydb/tests/library/harness/kikimr_config.py
index 62632b92bf56..3d58060ec6d7 100644
--- a/ydb/tests/library/harness/kikimr_config.py
+++ b/ydb/tests/library/harness/kikimr_config.py
@@ -85,6 +85,9 @@ def _load_default_yaml(default_tablet_node_ids, ydb_domain_name, static_erasure,
         yaml_dict["log_config"]["entry"].append({"component": log, "level": int(level)})
     if os.getenv("YDB_ENABLE_COLUMN_TABLES", "") == "true":
         yaml_dict |= {"column_shard_config": {"disabled_on_scheme_shard": False}}
+        yaml_dict["table_service_config"]["enable_htap_tx"] = True
+        yaml_dict["table_service_config"]["enable_olap_sink"] = True
+        yaml_dict["table_service_config"]["enable_create_table_as"] = True
     return yaml_dict
 
 
diff --git a/ydb/tests/olap/ya.make b/ydb/tests/olap/ya.make
index 48b98888ac28..1689defbcf07 100644
--- a/ydb/tests/olap/ya.make
+++ b/ydb/tests/olap/ya.make
@@ -1,6 +1,7 @@
 PY3TEST()
     ENV(YDB_DRIVER_BINARY="ydb/apps/ydbd/ydbd")
     ENV(YDB_CLI_BINARY="ydb/apps/ydb/ydb")
+    ENV(YDB_ENABLE_COLUMN_TABLES="true")
 
     TEST_SRCS(
         test_quota_exhaustion.py
diff --git a/ydb/tests/sql/ya.make b/ydb/tests/sql/ya.make
index 0814437a954a..a563a1bda68a 100644
--- a/ydb/tests/sql/ya.make
+++ b/ydb/tests/sql/ya.make
@@ -1,5 +1,6 @@
 PY3TEST()
 ENV(YDB_DRIVER_BINARY="ydb/apps/ydbd/ydbd")
+ENV(YDB_ENABLE_COLUMN_TABLES="true")
 
 TEST_SRCS(
     test_kv.py
diff --git a/ydb/tests/stress/olap_workload/tests/ya.make b/ydb/tests/stress/olap_workload/tests/ya.make
index 73cf8d439be6..a5a43c632de8 100644
--- a/ydb/tests/stress/olap_workload/tests/ya.make
+++ b/ydb/tests/stress/olap_workload/tests/ya.make
@@ -1,5 +1,6 @@
 PY3TEST()
 ENV(YDB_DRIVER_BINARY="ydb/apps/ydbd/ydbd")
+ENV(YDB_ENABLE_COLUMN_TABLES="true")
 
 TEST_SRCS(
     test_workload.py