diff --git a/.gitignore b/.gitignore
index c3604b2a..489ea2c6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,9 @@ dist
 quantstats.egg-info
 QuantStats.egg-info
 Icon
-/tests
 .vscode
 Icon
+
+.pytest_cache
+htmlcov
+.coverage
diff --git a/quantstats/_plotting/wrappers.py b/quantstats/_plotting/wrappers.py
index c4a06501..12f68d3c 100644
--- a/quantstats/_plotting/wrappers.py
+++ b/quantstats/_plotting/wrappers.py
@@ -485,7 +485,7 @@ def log_returns(
 
 def daily_returns(
     returns,
-    benchmark,
+    benchmark=None,
     grayscale=False,
     figsize=(10, 4),
     fontname="Arial",