diff --git a/src/tidewave/middleware.py b/src/tidewave/middleware.py
index 1624fbb..f7ece3e 100644
--- a/src/tidewave/middleware.py
+++ b/src/tidewave/middleware.py
@@ -62,6 +62,8 @@ def __call__(self, environ: dict[str, Any], start_response: Callable):
         else:
             full_path = path_info
 
+        full_path = full_path.rstrip("/")
+
         if full_path.startswith("/tidewave"):
             security_error = self._check_security(environ)
             if security_error:
diff --git a/src/tidewave/sqlalchemy/models.py b/src/tidewave/sqlalchemy/models.py
index da61865..43b6141 100644
--- a/src/tidewave/sqlalchemy/models.py
+++ b/src/tidewave/sqlalchemy/models.py
@@ -21,8 +21,12 @@ def get_models() -> str:
             if model is base_class:
                 continue
 
-            # Check if it's an abstract model (has __abstract__ = True)
-            if getattr(model, "__abstract__", False):
+            # Check if it's an abstract model (has __abstract__ = True).
+            # Note that we check the dict instead of using getattr,
+            # so that we check the attribute on the specific model,
+            # otherwise we may access the attribute inherited from
+            # parent.
+            if model.__dict__.get("__abstract__", False):
                 continue
 
             # Check if it has any columns (indicating it's a concrete model)