By default, detection of implicit string concatenation of line jumps is disabled. Hence the following code will not trigger this rule: .. code-block:: python SEQ = ('a', 'b' 'c') In order to detect this case, you must enable `check-str-concat-over-line-jumps`: .. code-block:: toml [STRING_CONSTANT] check-str-concat-over-line-jumps = yes However, the drawback of this setting is that it will trigger false positive for string parameters passed on multiple lines in function calls: .. code-block:: python warnings.warn( "rotate() is deprecated and will be removed in a future release. " "Use the rotation() context manager instead.", DeprecationWarning, stacklevel=3, )