diff --git a/docs/coding/typing.rst b/docs/coding/typing.rst
index e57201923e551c1ac0f0ba5ad1f5e74c3c8a62da..2a687197d647d17b2b8bc4b062420386083029b2 100644
--- a/docs/coding/typing.rst
+++ b/docs/coding/typing.rst
@@ -21,7 +21,7 @@ They are as follows:
 
 You may use these generics in your classes, eg.
 
-::
+.. code-block:: python
 
     def enumerate(v: Iteratable[int]) -> int:
         ...
diff --git a/tests/test_coding/test_sequences.py b/tests/test_coding/test_sequences.py
index 66cb89d22f303b9be39c9732a8fb467e0ecaff97..f9693c725699dffad75541ac669d0f489619698e 100644
--- a/tests/test_coding/test_sequences.py
+++ b/tests/test_coding/test_sequences.py
@@ -15,7 +15,7 @@ class TestSequences(unittest.TestCase):
 
     def test_check_with_index(self):
         a = [1,2,3,4,5]
-        elem, i = choose_with_index(lambda a: a == 3)
+        elem, i = choose_with_index(lambda b: b == 3, a)
         self.assertEqual(elem, 3)
         self.assertEqual(i, 2)