From a8711824e7e967bb4a547cf5cbc88a6c1ed46412 Mon Sep 17 00:00:00 2001
From: Samar <ryanbald44@gmail.com>
Date: Wed, 4 Nov 2026 22:09:29 -0600
Subject: [PATCH] gh-131178: Add tests for symtable command-line interface

---
 Lib/test/test_symtable.py | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Lib/test/test_symtable.py b/Lib/test/test_symtable.py
index da00b0bfa74b125..0ac7d6a6803a4fa 100644
--- a/Lib/test/test_symtable.py
+++ b/Lib/test/test_symtable.py
@@ -9,6 +9,7 @@
 
 from test import support
 from test.support import os_helper
+from test.support.script_helper import assert_python_ok
 
 
 TEST_CODE = """
@@ -910,5 +911,22 @@ def test_stdin(self):
         self.assertIn("symbol table for module from file '<stdin>':", lines)
 
 
+class CommandLineSubprocessTest(unittest.TestCase):
+
+    @support.requires_subprocess()
+    def test_file(self):
+        filename = os_helper.TESTFN
+        with open(filename, 'w') as f:
+            f.write("x = 1\n")
+        self.addCleanup(os_helper.unlink, filename)
+
+        rc, stdout, stderr = assert_python_ok('-m', 'symtable', filename)
+        self.assertIn(
+            f"symbol table for module from file {filename!r}:".encode(), stdout
+        )
+        self.assertIn(b"local symbol 'x': def_local", stdout)
+        self.assertEqual(stderr, b'')
+
+
 if __name__ == '__main__':
     unittest.main()