[1.8.x] Refs #24538 -- Simplified a test per Aymeric's feedback.

Backport of a184a99123 from master

tests/template_backends/test_jinja2.py

@@ -30,18 +30,11 @@ class Jinja2Tests(TemplateStringsTests):
 
     def test_self_context(self):
         """
-        #24538 -- Using 'self' in the context should not throw errors
+        Using 'self' in the context should not throw errors (#24538).
         """
-        engine = Jinja2({
-            'DIRS': [],
-            'APP_DIRS': False,
-            'NAME': 'django',
-            'OPTIONS': {},
-        })
-
         # self will be overridden to be a TemplateReference, so the self
         # variable will not come through. Attempting to use one though should
         # not throw an error.
-        template = engine.from_string('hello {{ foo }}!')
+        template = self.engine.from_string('hello {{ foo }}!')
         content = template.render(context={'self': 'self', 'foo': 'world'})
         self.assertEqual(content, 'hello world!')