diff --git a/lolafect/connections.py b/lolafect/connections.py
index 450c4e4..caf3fdf 100644
--- a/lolafect/connections.py
+++ b/lolafect/connections.py
@@ -62,7 +62,13 @@ def close_trino_connection(trino_connection: trino.dbapi.Connection) -> None:
         trino_connection.close()
         logger.info("Trino connection closed successfully.")
         return
-    logger.info("No connection received.")
+    logger.warning(
+        f"Instead of a Trino connection, a {type(trino_connection)} was received."
+    )
+    raise DeprecationWarning(
+        "This method will only accept the type 'trino.dbapi.Connection' in next major release.\n"
+        "Please, update your code accordingly."
+    )
 
 
 @contextmanager
@@ -247,21 +253,41 @@ def connect_to_mysql(
 
 @task(trigger=all_finished)
 def close_mysql_connection(connection: pymysql.Connection) -> None:
+    """
+    Close a MySQL connection, or do nothing if something different is passed.
+
+    :param connection: a MySQL connection.
+    :return: None
+    """
     logger = prefect.context.get("logger")
 
     if isinstance(connection, pymysql.Connection):
         connection.close()
-        logger.info("DW connection closed successfully.")
+        logger.info("MySQL connection closed successfully.")
         return
-    logger.info("No connection received.")
+    logger.warning(f"Instead of a MySQL connection, a {type(connection)} was received.")
+    raise DeprecationWarning(
+        "This method will only accept the type 'pymysql.Connection' in next major release.\n"
+        "Please, update your code accordingly."
+    )
 
 
 @task(trigger=all_finished)
 def close_ssh_tunnel(tunnel: SSHTunnelForwarder) -> None:
+    """
+    Close a SSH tunnel, or do nothing if something different is passed.
+
+    :param tunnel: a SSH tunnel.
+    :return:
+    """
     logger = prefect.context.get("logger")
 
     if isinstance(tunnel, SSHTunnelForwarder):
         tunnel.stop()
         logger.info("SSH tunnel closed successfully.")
         return
-    logger.info("No connection received.")
+    logger.warning(f"Instead of a SSH tunnel, a {type(tunnel)} was received.")
+    raise DeprecationWarning(
+        "This method will only accept the type 'SSHTunnelForwarder' in next major release.\n"
+        "Please, update your code accordingly."
+    )