diff --git a/Pipfile b/Pipfile
index 814695f55..1233ab136 100644
--- a/Pipfile
+++ b/Pipfile
@@ -23,6 +23,9 @@ pytest-timeout = "*"
 tox = "*"
 dominate = "*"
 
+# hardware tests
+pyserial = "*"
+
 ## test requirements
 shamir-mnemonic = "*"
 fido2 = ">=0.8.0"
diff --git a/Pipfile.lock b/Pipfile.lock
index ebae59564..d93d9bf2c 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "cd0bea17b8297d361dfa185570d431e1d151f34fbe375db56ba6e51b8e912f8b"
+            "sha256": "c629a9e3114cb34d93e6d80dde6e2a458deb5082017ab91f0ed9144a00756b19"
         },
         "pipfile-spec": 6,
         "requires": {},
@@ -571,6 +571,14 @@
             "index": "pypi",
             "version": "==4.79"
         },
+        "pyserial": {
+            "hashes": [
+                "sha256:6e2d401fdee0eab996cf734e67773a0143b932772ca8b42451440cfed942c627",
+                "sha256:e0770fadba80c31013896c7e6ef703f72e7834965954a78e71a3049488d4d7d8"
+            ],
+            "index": "pypi",
+            "version": "==3.4"
+        },
         "pytest": {
             "hashes": [
                 "sha256:0e5b30f5cb04e887b91b1ee519fa3d89049595f428c1db76e73bd7f17b09b172",