diff --git a/freqtrade/tests/optimize/test_backtesting.py b/freqtrade/tests/optimize/test_backtesting.py
index 8b7e25e42..0788a126c 100644
--- a/freqtrade/tests/optimize/test_backtesting.py
+++ b/freqtrade/tests/optimize/test_backtesting.py
@@ -53,7 +53,7 @@ def trim_dictlist(dl, num):
     new = {}
     for pair, pair_data in dl.items():
         # Can't figure out why -num wont work
-        #new[pair] = pair_data[-num:]
+        # new[pair] = pair_data[-num:]
         new[pair] = pair_data[-100:]
     return new