diff --git a/spyder_line_profiler/tests/test_lineprofiler.py b/spyder_line_profiler/tests/test_lineprofiler.py
index ce1d499..cc7af1f 100644
--- a/spyder_line_profiler/tests/test_lineprofiler.py
+++ b/spyder_line_profiler/tests/test_lineprofiler.py
@@ -26,7 +26,7 @@
 @profile
 def foo():
     time.sleep(1)
-    xs = []
+    xs = []  # Test non-ascii character: Σ
     for k in range(100):
         xs = xs + ['x']
 foo()"""