diff --git a/dist/tools/flake8/check.sh b/dist/tools/flake8/check.sh
index 08e2168cf0..f8705ffe15 100755
--- a/dist/tools/flake8/check.sh
+++ b/dist/tools/flake8/check.sh
@@ -23,7 +23,12 @@ cd $RIOTBASE
 : "${RIOTTOOLS:=${RIOTBASE}/dist/tools}"
 . "${RIOTTOOLS}"/ci/changed_files.sh
 
-EXCLUDE='^(.+/vendor/|dist/tools/cc2538-bsl|dist/tools/mcuboot|dist/tools/uhcpd|dist/tools/stm32loader)'
+EXCLUDE="^(.+/vendor/\
+|dist/tools/cc2538-bsl\
+|dist/tools/mcuboot\
+|dist/tools/uhcpd\
+|dist/tools/stm32loader\
+|dist/tools/suit_v4/suit_manifest_encoder_04)"
 FILEREGEX='(\.py$|pyterm$)'
 FILES=$(FILEREGEX=${FILEREGEX} EXCLUDE=${EXCLUDE} changed_files)