diff --git a/fbchat/_mqtt.py b/fbchat/_mqtt.py
index a03f615..43105af 100644
--- a/fbchat/_mqtt.py
+++ b/fbchat/_mqtt.py
@@ -146,7 +146,7 @@ class Listener:
     def _fetch_sequence_id(session: _session.Session) -> int:
         """Fetch sequence ID."""
         params = {
-            "limit": 1,
+            "limit": 0,
             "tags": ["INBOX"],
             "before": None,
             "includeDeliveryReceipts": False,
diff --git a/fbchat/_user.py b/fbchat/_user.py
index 92cb53e..4ab8286 100644
--- a/fbchat/_user.py
+++ b/fbchat/_user.py
@@ -195,7 +195,7 @@ class UserData(User):
         )
 
 
-@attr.s
+@attrs_default
 class ActiveStatus:
     #: Whether the user is active now
     active = attr.ib(None, type=bool)
diff --git a/tests/test_examples.py b/tests/test_examples.py
new file mode 100644
index 0000000..303b607
--- /dev/null
+++ b/tests/test_examples.py
@@ -0,0 +1,10 @@
+import pytest
+import py_compile
+import glob
+from os import path
+
+
+def test_examples_compiles():
+    # Compiles the examples, to check for syntax errors
+    for name in glob.glob(path.join(path.dirname(__file__), "../examples", "*.py")):
+        py_compile.compile(name)