diff --git a/tests/test_performance.py b/tests/test_performance.py
index 25a55ac8..9f0d5eb0 100644
--- a/tests/test_performance.py
+++ b/tests/test_performance.py
@@ -47,6 +47,7 @@ def test_repeated_summation_complexity():
     t0 = t_list[0]
     for n, t in zip(n_list[1:], t_list[1:]):
         # Check that the plot of t vs n is linear on a log scale to within 10%
+        # See PR 275
         assert 0.9 * log10(n / n0) < log10(t / t0) < 1.1 * log10(n / n0)