diff --git a/PyInstaller/lib/modulegraph/modulegraph.py b/PyInstaller/lib/modulegraph/modulegraph.py
index f4acf15cce9..788de51f1ad 100644
--- a/PyInstaller/lib/modulegraph/modulegraph.py
+++ b/PyInstaller/lib/modulegraph/modulegraph.py
@@ -26,8 +26,6 @@
 from collections import deque, namedtuple
 import warnings
 
-from typing import Optional
-
 from altgraph.ObjectGraph import ObjectGraph
 from altgraph import GraphError
 
@@ -2059,7 +2057,9 @@ def _safe_import_module(
                         co = self._replace_paths_in_code(co)
                     module.code = co
                 except SyntaxError:
-                    self.msg(1, "safe_import_module: SyntaxError in ", pathname)
+                    self.msg(
+                        1, "safe_import_module: SyntaxError in ", pathname,
+                    )
                     cls = InvalidSourceModule
                     module = self.createNode(cls, module_name)