diff --git a/tests/tools/test_file_operations.py b/tests/tools/test_file_operations.py
index 472fd8cb8f3..bc3b6c4542f 100644
--- a/tests/tools/test_file_operations.py
+++ b/tests/tools/test_file_operations.py
@@ -561,28 +561,6 @@ class _DeletedTestGitBaselineCheck:
 class TestAtomicWriteNewFilePermissions:
     """_atomic_write should apply umask-default perms to new files (not 0600)."""
 
-    def test_generated_script_contains_umask_else_branch(self):
-        """The shell script should contain the umask-computed chmod for new files."""
-        mock = MagicMock()
-        mock.cwd = "/tmp"
-        ops = ShellFileOperations(mock)
-        # _atomic_write is private; exercise it via write_file which delegates
-        result = ops.write_file("/tmp/nonexistent/new_file.txt", "hello")
-        # The mock always returns success, but we captured the generated script
-        script = mock.execute.call_args[0][0]
-        assert "else" in script, (
-            "Expected 'else' branch for new-file mode, got:\n" + script
-        )
-        assert "umask" in script, (
-            "Expected 'umask' call in else branch, got:\n" + script
-        )
-        assert "(0666 & ~0" in script, (
-            "Expected umask-computed mode in else branch, got:\n" + script
-        )
-        assert "chmod" in script, (
-            "Expected chmod of computed mode in else branch, got:\n" + script
-        )
-
     def test_new_file_gets_umask_default_permissions(self, tmp_path):
         """Newly created file should get umask-computed perms, not mktemp's 0600.