diff --git a/superset/db_engine_specs/presto.py b/superset/db_engine_specs/presto.py
index 68feb3f41..7f8405220 100644
--- a/superset/db_engine_specs/presto.py
+++ b/superset/db_engine_specs/presto.py
@@ -235,7 +235,6 @@ class PrestoEngineSpec(BaseEngineSpec):  # pylint: disable=too-many-public-metho
         that can set the correct properties for impersonating users
         :param connect_args: config to be updated
         :param uri: URI string
-        :param impersonate_user: Flag indicating if impersonation is enabled
         :param username: Effective username
         :return: None
         """
@@ -661,9 +660,7 @@ class PrestoEngineSpec(BaseEngineSpec):  # pylint: disable=too-many-public-metho
         Run a SQL query that estimates the cost of a given statement.
 
         :param statement: A single SQL statement
-        :param database: Database instance
         :param cursor: Cursor instance
-        :param username: Effective username
         :return: JSON response from Presto
         """
         sql = f"EXPLAIN (TYPE IO, FORMAT JSON) {statement}"