diff --git a/dist/tools/flake8/check.sh b/dist/tools/flake8/check.sh
index 3ae73d59aa..0fabd321ad 100755
--- a/dist/tools/flake8/check.sh
+++ b/dist/tools/flake8/check.sh
@@ -30,8 +30,9 @@ EXCLUDE="^(.+/vendor/\
 |dist/tools/mcuboot\
 |dist/tools/uhcpd\
 |dist/tools/stm32loader\
-|dist/tools/suit/suit-manifest-generator)\
-|dist/tools/esptool"
+|dist/tools/suit/suit-manifest-generator\
+|dist/tools/esptool\
+|dist/pythonlibs/riotctrl_*)"
 FILEREGEX='(\.py$|pyterm$)'
 FILES=$(FILEREGEX=${FILEREGEX} EXCLUDE=${EXCLUDE} changed_files)