diff --git a/capa/perf.py b/capa/perf.py
index d1e4083d..c7b416c0 100644
--- a/capa/perf.py
+++ b/capa/perf.py
@@ -1,3 +1,8 @@
 import collections
 
 counters = collections.Counter()
+
+
+def reset():
+    global counters
+    counters = collections.Counter()