diff --git a/tox.ini b/tox.ini
index 3441dba..78173d2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,6 +17,7 @@ deps =
     cocotbext-eth == 0.1.22
     cocotbext-pcie == 0.2.14
     cocotbext-uart == 0.1.2
+    scapy == 2.6.1
 
 commands =
     pytest {posargs:-n auto --verbose}