diff --git a/test/helper_tools/memoryleak2.py b/test/helper_tools/memoryleak2.py
new file mode 100644
index 000000000..26fa742d9
--- /dev/null
+++ b/test/helper_tools/memoryleak2.py
@@ -0,0 +1,21 @@
+import secrets
+from pathlib import Path
+
+import objgraph
+
+from mitmproxy import certs
+
+if __name__ == "__main__":
+    store = certs.CertStore.from_store(path=Path("~/.mitmproxy/").expanduser(), basename="mitmproxy", key_size=2048)
+    store.STORE_CAP = 5
+
+    for _ in range(5):
+        store.get_cert(commonname=secrets.token_hex(16).encode(), sans=[], organization=None)
+
+    objgraph.show_growth()
+
+    for _ in range(20):
+        store.get_cert(commonname=secrets.token_hex(16).encode(), sans=[], organization=None)
+
+    print("====")
+    objgraph.show_growth()