fix(tests): fix remaining test failures

tests/test_helpers.py

@@ -18,6 +18,8 @@ class TestHumanCount:
         """Test formatting of thousands."""
         assert human_count(1500) == "2k"
         assert human_count(2500) == "3k"
+        assert human_count(1000) == "1k"
+        assert human_count(999) == "999"
 
     def test_millions(self):
         """Test formatting of millions."""