diff --git a/tests/load/pipeline/test_pipelines.py b/tests/load/pipeline/test_pipelines.py
index 0e1928204a..daf1361c4c 100644
--- a/tests/load/pipeline/test_pipelines.py
+++ b/tests/load/pipeline/test_pipelines.py
@@ -1001,7 +1001,9 @@ def events_timezone_unset():
 
 @pytest.mark.parametrize(
     "destination_config",
-    destinations_configs(default_staging_configs=True, default_sql_configs=True),
+    destinations_configs(
+        default_staging_configs=True, default_sql_configs=True, subset=["duckdb", "postgres"]
+    ),
     ids=lambda x: x.name,
 )
 def test_pipeline_resource_incremental_int_lag(
@@ -1057,19 +1059,21 @@ def r3(_=dlt.sources.incremental("id", lag=1)):
 
 @pytest.mark.parametrize(
     "destination_config",
-    destinations_configs(default_staging_configs=True, default_sql_configs=True),
+    destinations_configs(
+        default_staging_configs=True, default_sql_configs=True, subset=["duckdb", "postgres"]
+    ),
     ids=lambda x: x.name,
 )
+@pytest.mark.parametrize("lag", [3602, 3601, 3600, 3599, -1])
 def test_pipeline_resource_incremental_datetime_lag(
-    destination_config: DestinationTestConfiguration,
+    destination_config: DestinationTestConfiguration, lag: float
 ) -> None:
     """
     Test incremental lag behavior for datetime data while using `id` as the primary key.
 
     - `r1` loads entries with `id` and `created_at` timestamps.
-    - `r2` adds new entries.
-    - `r3`, with a lag of 3600 seconds (1 hour), updates entries but only considers records
-      where `created_at` is within the 1-hour lag window.
+    - `r2`, with different lag values, updates entries but only considers records
+      where `created_at` is within the lag window.
 
     We validate that the final dataset reflects the correct data updates, taking the lag into account.
     """
@@ -1082,37 +1086,37 @@ def test_pipeline_resource_incremental_datetime_lag(
     @dlt.resource(name=name, primary_key="id")
     def r1(_=dlt.sources.incremental("created_at")):
         yield from [
-            {"id": 1, "created_at": "2023-03-03T00:00:00Z", "event": "event1"},
-            {"id": 2, "created_at": "2023-03-03T00:15:00Z", "event": "event2"},
-            {"id": 3, "created_at": "2023-03-03T00:30:00Z", "event": "event3"},
-            {"id": 4, "created_at": "2023-03-03T00:45:00Z", "event": "event4"},
+            {"id": 1, "created_at": "2023-03-03T01:00:00Z", "event": "1"},
+            {"id": 2, "created_at": "2023-03-03T01:00:01Z", "event": "2"},
+            {
+                "id": 3,
+                "created_at": "2023-03-03T02:00:01Z",
+                "event": "3",
+            },  # the lag will be applied here
         ]
 
-    @dlt.resource(name=name, primary_key="id")
-    def r2(_=dlt.sources.incremental("created_at")):
-        yield from [
-            {"id": 5, "created_at": "2023-03-03T01:00:00Z", "event": "event5"},
-            {"id": 6, "created_at": "2023-03-03T01:15:00Z", "event": "event6"},
-        ]
-
-    # r3 with a lag of 3600 seconds (1 hour) will affect datetime updates
     updated_events = [
-        {"id": 3, "created_at": "2023-03-03T06:00:00Z", "event": "changed"},
-        {"id": 5, "created_at": "2023-03-03T06:00:00Z", "event": "changed"},
+        {"id": 1, "created_at": "2023-03-03T01:00:00Z", "event": "updated"},
+        {"id": 2, "created_at": "2023-03-03T01:00:01Z", "event": "updated"},
     ]
 
     @dlt.resource(name=name, primary_key="id", write_disposition="merge")
-    def r3(_=dlt.sources.incremental("created_at", lag=3600)):  # 1-hour lag in seconds
-        yield from [
-            {"id": 7, "created_at": "2023-03-03T06:00:00Z", "event": "event7"}
-        ] + updated_events
+    def r2(_=dlt.sources.incremental("created_at", lag=lag)):
+        yield from [{"id": 4, "created_at": "2023-03-03T03:00:00Z", "event": "4"}] + updated_events
 
     pipeline.run(r1)
     pipeline.run(r2)
-    pipeline.run(r3)
 
     # Validate final dataset
+    results = {
+        3602: ["updated", "updated", "3", "4"],
+        3601: ["updated", "updated", "3", "4"],
+        3600: ["1", "updated", "3", "4"],
+        3599: ["1", "2", "3", "4"],
+        -1: ["1", "2", "3", "4"],
+    }
+
     with pipeline.sql_client() as sql_client:
         assert [
             row[0] for row in sql_client.execute_sql(f"SELECT event FROM {name} ORDER BY id")
-        ] == ["event1", "event2", "changed", "event4", "changed", "event6", "event7"]
+        ] == results[int(lag)]