diff --git a/src/flask/coverage_tracker.py b/src/flask/coverage_tracker.py
index d5a333a4..f129575b 100644
--- a/src/flask/coverage_tracker.py
+++ b/src/flask/coverage_tracker.py
@@ -4,6 +4,6 @@ total_run_branches = 20
 for i in range(1, total_run_branches + 1):
     branch_coverage[i] = 0
 
+
 def mark_branch(branch_id):
     branch_coverage[branch_id] += 1
-