diff --git a/.arclint b/.arclint
--- a/.arclint
+++ b/.arclint
@@ -281,6 +281,7 @@
         "lint-python-mypy": {
             "type": "lint-python-mypy",
             "include": "(\\.py$)",
+            "exclude": "(^contrib/)",
             "flags": [
                 "--ignore-missing-imports"
             ]
diff --git a/contrib/utils/install-dependencies.sh b/contrib/utils/install-dependencies.sh
--- a/contrib/utils/install-dependencies.sh
+++ b/contrib/utils/install-dependencies.sh
@@ -58,6 +58,7 @@
   libzmq3-dev
   lld
   make
+  mypy
   ninja-build
   nsis
   php-codesniffer
diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -45,7 +45,7 @@
     CROSS = "x "
     CIRCLE = "o "
 
-if os.name != 'nt' or sys.getwindowsversion() >= (10, 0, 14393):
+if os.name != 'nt' or sys.getwindowsversion() >= (10, 0, 14393):  # type: ignore
     if os.name == 'nt':
         import ctypes
         kernel32 = ctypes.windll.kernel32  # type: ignore