test: reduce flakiness of tz testing

tests/test_client.py

@@ -651,7 +651,6 @@ def test_initial_sequence(client: Letta):
 
 
 def test_timezone(client: Letta):
-    # create an agent
     agent = client.agents.create(
         memory_blocks=[{"label": "human", "value": ""}, {"label": "persona", "value": ""}],
         model="letta/letta-free",
@@ -659,7 +658,6 @@ def test_timezone(client: Letta):
         timezone="America/Los_Angeles",
     )
 
-    # get the timzone
     agent = client.agents.retrieve(agent_id=agent.id)
     assert agent.timezone == "America/Los_Angeles"
 
@@ -674,13 +672,11 @@ def test_timezone(client: Letta):
     )
     # second message is assistant message
     assert response.messages[1].message_type == "assistant_message"
-    # content is similar to current timezone
-    assert (
-        "America/Los_Angeles" in response.messages[1].content
-        or "PDT" in response.messages[1].content
-        or "PST" in response.messages[1].content
-        or "Pacific Daylight Time" in response.messages[1].content
-        or "Pacific Standard Time" in response.messages[1].content
+
+    pacific_tz_indicators = {"America/Los_Angeles", "PDT", "PST", "PT", "Pacific Daylight Time", "Pacific Standard Time", "Pacific Time"}
+    content = response.messages[1].content
+    assert any(
+        tz in content for tz in pacific_tz_indicators
     ), f"Response content: {response.messages[1].content} does not contain expected timezone"
 
     # test updating the timezone