From 43f00e040903e42032e445aaf6ef9c7a9fb028d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dani=C3=ABl=20van=20Noord?=
 <13665637+DanielNoord@users.noreply.github.com>
Date: Thu, 21 Oct 2021 23:50:59 +0200
Subject: Fix decorator for when option is not from ``PyLinter``

---
 pylint/testutils/decorator.py    | 23 ++++++++++++++++++-----
 tests/testutils/dummy_checker.py |  0
 2 files changed, 18 insertions(+), 5 deletions(-)
 create mode 100644 tests/testutils/dummy_checker.py

diff --git a/pylint/testutils/decorator.py b/pylint/testutils/decorator.py
index eaf72a62a..87fbd7afa 100644
--- a/pylint/testutils/decorator.py
+++ b/pylint/testutils/decorator.py
@@ -24,11 +24,24 @@ def set_config(**kwargs):
             except optparse.OptionError:
                 # Check if option is one of the base options of the PyLinter class
                 for key, value in kwargs.items():
-                    self.checker.set_option(
-                        key.replace("_", "-"),
-                        value,
-                        optdict=dict(PyLinter.make_options())[key.replace("_", "-")],
-                    )
+                    try:
+                        self.checker.set_option(
+                            key.replace("_", "-"),
+                            value,
+                            optdict=dict(PyLinter.make_options())[
+                                key.replace("_", "-")
+                            ],
+                        )
+                    except KeyError:
+                        # pylint: disable-next=fixme
+                        # TODO: Find good way to double load checkers in unittests
+                        # When options are used by multiple checkers we need to load both of them
+                        # to be able to get an optdict
+                        self.checker.set_option(
+                            key.replace("_", "-"),
+                            value,
+                            optdict={},
+                        )
             if isinstance(self, CheckerTestCase):
                 # reopen checker in case, it may be interested in configuration change
                 self.checker.open()
diff --git a/tests/testutils/dummy_checker.py b/tests/testutils/dummy_checker.py
new file mode 100644
index 000000000..e69de29bb
-- 
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