diff --git a/tests/test_core_sdk.py b/tests/test_core_sdk.py
index 8d761794..b2292542 100644
--- a/tests/test_core_sdk.py
+++ b/tests/test_core_sdk.py
@@ -249,7 +249,7 @@ def test_create_update_trace():
         metadata={"key": "value"},
         public=True,
     )
-    trace.update(metadata={"key": "value2"}, public=False)
+    trace.update(metadata={"key2": "value2"}, public=False)
 
     langfuse.flush()
 
@@ -257,7 +257,7 @@ def test_create_update_trace():
 
     assert trace.name == trace_name
     assert trace.user_id == "test"
-    assert trace.metadata == {"key": "value2"}
+    assert trace.metadata == {"key": "value", "key2": "value2"}
     assert trace.public is False
 
 
@@ -747,7 +747,7 @@ def test_create_span_and_get_observation():
     langfuse.span(id=span_id, name="span")
     langfuse.flush()
 
-    sleep(1)
+    sleep(2)
     observation = langfuse.get_observation(span_id)
     assert observation.name == "span"
     assert observation.id == span_id
@@ -1414,7 +1414,7 @@ def test_fetch_sessions():
     langfuse.flush()
 
     # Fetch traces
-    sleep(1)
+    sleep(2)
     response = langfuse.fetch_sessions()
 
     # Assert the structure of the response, cannot check for the exact number of sessions as the table is not cleared between tests
diff --git a/tests/test_decorators.py b/tests/test_decorators.py
index c5090e48..7db46e2f 100644
--- a/tests/test_decorators.py
+++ b/tests/test_decorators.py
@@ -2,6 +2,7 @@
 from collections import defaultdict
 from concurrent.futures import ThreadPoolExecutor
 from contextvars import ContextVar
+from time import sleep
 from typing import Optional
 
 import pytest
@@ -227,6 +228,7 @@ def level_1_function(*args, **kwargs):
         )
 
     langfuse_context.flush()
+    sleep(1)
 
     trace_data = get_api().trace.get(mock_trace_id)
 
@@ -309,8 +311,7 @@ def level_1_function(*args, **kwargs):
 
     langfuse_context.flush()
 
-    print("mock_id_1", mock_trace_id_1)
-    print("mock_id_2", mock_trace_id_2)
+    sleep(1)
 
     for mock_id in [mock_trace_id_1, mock_trace_id_2]:
         trace_data = get_api().trace.get(mock_id)
@@ -1416,6 +1417,7 @@ def main():
     main(langfuse_observation_id=mock_trace_id)
 
     langfuse_context.flush()
+    sleep(1)
 
     trace_data = get_api().trace.get(mock_trace_id)
     assert trace_data.name == "updated_name"
diff --git a/tests/test_langchain.py b/tests/test_langchain.py
index 3f3bcc6c..8e66a84e 100644
--- a/tests/test_langchain.py
+++ b/tests/test_langchain.py
@@ -2,6 +2,7 @@
 import random
 import string
 import time
+from time import sleep
 from typing import Any, Dict, List, Mapping, Optional
 
 import pytest
@@ -1811,6 +1812,7 @@ def test_link_langfuse_prompts_invoke():
     )
 
     langfuse_handler.flush()
+    sleep(1)
 
     trace = get_api().trace.get(langfuse_handler.get_trace_id())