2 files changed, 13 insertions, 0 deletions
diff --git a/Lib/pdb.py b/Lib/pdb.py
index a838a26..494e640 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -154,6 +154,7 @@ class _ScriptTarget(str):
             __name__='__main__',
             __file__=self,
             __builtins__=__builtins__,
+            __spec__=None,
         )
 
     @property
diff --git a/Lib/test/test_pdb.py b/Lib/test/test_pdb.py
index 51b8442..0e1b1c9 100644
--- a/Lib/test/test_pdb.py
+++ b/Lib/test/test_pdb.py
@@ -2013,6 +2013,18 @@ def bœr():
             ('bœr', 1),
         )
 
+    def test_spec(self):
+        # Test that __main__.__spec__ is set to None when running a script
+        script = """
+            import __main__
+            print(__main__.__spec__)
+        """
+
+        commands = "continue"
+
+        stdout, _ = self.run_pdb_script(script, commands)
+        self.assertIn('None', stdout)
+
     def test_issue7964(self):
         # open the file as binary so we can force \r\n newline
         with open(os_helper.TESTFN, 'wb') as f: