diff --git a/src/flask/coverage_tracker.py b/src/flask/coverage_tracker.py
new file mode 100644
index 0000000000..f129575b39
--- /dev/null
+++ b/src/flask/coverage_tracker.py
@@ -0,0 +1,9 @@
+# coverage_tracker.py
+branch_coverage = {}
+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