diff --git a/pyperformance/_benchmark.py b/pyperformance/_benchmark.py
index 5ec6fe07..bade89ea 100644
--- a/pyperformance/_benchmark.py
+++ b/pyperformance/_benchmark.py
@@ -1,7 +1,7 @@
 
 __all__ = [
     'BenchmarkSpec',
-    'Benchmark'
+    'Benchmark',
     'check_name',
     'parse_benchmark',
 ]