diff --git a/dbt/adapters/mariadb/connections.py b/dbt/adapters/mariadb/connections.py
index 8b2c9d8..94c9428 100644
--- a/dbt/adapters/mariadb/connections.py
+++ b/dbt/adapters/mariadb/connections.py
@@ -20,7 +20,7 @@ class MariaDBCredentials(Credentials):
     server: str = ""
     unix_socket: Optional[str] = None
     port: Optional[int] = None
-    database: Optional[str] = None
+    database: Optional[str] = None  # type: ignore[assignment]
     schema: str = ""
     username: Optional[str] = None
     password: Optional[str] = None
diff --git a/dbt/adapters/mysql/connections.py b/dbt/adapters/mysql/connections.py
index 848f2cf..353d5ce 100644
--- a/dbt/adapters/mysql/connections.py
+++ b/dbt/adapters/mysql/connections.py
@@ -20,7 +20,7 @@ class MySQLCredentials(Credentials):
     server: str = ""
     unix_socket: Optional[str] = None
     port: Optional[int] = None
-    database: Optional[str] = None
+    database: Optional[str] = None  # type: ignore[assignment]
     schema: str = ""
     username: Optional[str] = None
     password: Optional[str] = None
diff --git a/dbt/adapters/mysql5/connections.py b/dbt/adapters/mysql5/connections.py
index cdc258c..0160bd9 100644
--- a/dbt/adapters/mysql5/connections.py
+++ b/dbt/adapters/mysql5/connections.py
@@ -20,7 +20,7 @@ class MySQLCredentials(Credentials):
     server: str = ""
     unix_socket: Optional[str] = None
     port: Optional[int] = None
-    database: Optional[str] = None
+    database: Optional[str] = None  # type: ignore[assignment]
     schema: str = ""
     username: Optional[str] = None
     password: Optional[str] = None