diff --git a/tests/test_stream_ops.py b/tests/test_stream_ops.py
index 7792e24..a603df7 100644
--- a/tests/test_stream_ops.py
+++ b/tests/test_stream_ops.py
@@ -17,7 +17,6 @@
 from streamstore.utils import metered_bytes
 
 
-@pytest.mark.asyncio(loop_scope="session")
 @pytest.mark.stream
 class TestStreamOperations:
     async def test_check_tail_empty_stream(self, stream: Stream):
@@ -64,24 +63,24 @@ async def test_append_with_match_seq_num(self, stream: Stream):
         assert output_1.next_seq_num == 2
 
     async def test_append_with_timestamp(self, stream: Stream):
-        timestamp_1 = int(time.time())
+        timestamp_0 = int(time.time())
         await asyncio.sleep(0.1)
-        timestamp_2 = int(time.time())
+        timestamp_1 = int(time.time())
 
         input = AppendInput(
             records=[
-                Record(body=b"record-0", timestamp=timestamp_1),
-                Record(body=b"record-1", timestamp=timestamp_2),
+                Record(body=b"record-0", timestamp=timestamp_0),
+                Record(body=b"record-1", timestamp=timestamp_1),
             ]
         )
         output = await stream.append(input)
 
         assert output.start_seq_num == 0
-        assert output.start_timestamp == timestamp_1
+        assert output.start_timestamp == timestamp_0
         assert output.end_seq_num == 2
-        assert output.end_timestamp == timestamp_2
+        assert output.end_timestamp == timestamp_1
         assert output.next_seq_num == 2
-        assert output.last_timestamp == timestamp_2
+        assert output.last_timestamp == timestamp_1
 
     async def test_read_from_seq_num_zero(self, stream: Stream):
         await stream.append(
@@ -133,6 +132,29 @@ async def test_read_from_tail_offset(self, stream: Stream):
         assert records[0].body == b"record-3"
         assert records[1].body == b"record-4"
 
+    async def test_read_until_timestamp(self, stream: Stream):
+        timestamp_0 = int(time.time() * 1000)
+        await asyncio.sleep(0.2)
+        timestamp_1 = int(time.time() * 1000)
+        await asyncio.sleep(0.2)
+        timestamp_2 = int(time.time() * 1000)
+
+        await stream.append(
+            AppendInput(
+                records=[
+                    Record(body=b"record-0", timestamp=timestamp_0),
+                    Record(body=b"record-1", timestamp=timestamp_1),
+                    Record(body=b"record-2", timestamp=timestamp_2),
+                ]
+            )
+        )
+
+        records = await stream.read(start=Timestamp(timestamp_0), until=timestamp_2)
+        assert isinstance(records, list)
+        assert len(records) == 2
+        assert records[0].timestamp == timestamp_0
+        assert records[1].timestamp == timestamp_1
+
     async def test_read_beyond_tail(self, stream: Stream):
         await stream.append(
             AppendInput(records=[Record(body=f"record-{i}".encode()) for i in range(5)])
@@ -188,7 +210,9 @@ async def producer():
         producer_task = asyncio.create_task(producer())
 
         try:
-            async for output in stream.read_session(start=SeqNum(tail.next_seq_num)):
+            async for output in stream.read_session(
+                start=SeqNum(tail.next_seq_num), clamp=True
+            ):
                 if isinstance(output, list) and len(output) > 0:
                     assert output[0].body == b"record-0"
                     break