Fix buggy test

Author: gray-adeyi

tests/unit/test_baseapi.py

@@ -17,9 +17,10 @@
 
 class BaseAPITestCase(MockedAPITestCase):
     def test_raises_exception_for_missing_key(self) -> None:
-        os.environ.pop("PAYSTACK_SECRET_KEY", None)
+        paystack_secret_key = os.environ.pop("PAYSTACK_SECRET_KEY", None)
         with self.assertRaises(MissingSecretKeyException):
             BaseAPIClient()
+        os.environ["PAYSTACK_SECRET_KEY"] = paystack_secret_key
 
     def test__full_url(self) -> None:
         load_dotenv()