diff --git a/test/lint/lint-python-mutable-default-parameters.sh b/test/lint/lint-python-mutable-default-parameters.sh
index 1f9f035d30..6d08c72dcf 100755
--- a/test/lint/lint-python-mutable-default-parameters.sh
+++ b/test/lint/lint-python-mutable-default-parameters.sh
@@ -8,7 +8,7 @@
 
 export LC_ALL=C
 EXIT_CODE=0
-OUTPUT=$(git grep -E '^\s*def [a-zA-Z0-9_]+\(.*=\s*(\[|\{)' -- "*.py")
+OUTPUT=$(git grep -E '^\s*def [a-zA-Z0-9_]+\(.*=\s*(\[|\{)' -- "*.py" ':!*/bitcoin_functional/*')
 if [[ ${OUTPUT} != "" ]]; then
     echo "A mutable list or dict seems to be used as default parameter value:"
     echo
diff --git a/test/lint/lint-python.sh b/test/lint/lint-python.sh
index 4fc130497b..2bde80307d 100755
--- a/test/lint/lint-python.sh
+++ b/test/lint/lint-python.sh
@@ -94,7 +94,7 @@ EXIT_CODE=0
 
 if ! PYTHONWARNINGS="ignore" flake8 --ignore=B,C,E,F,I,N,W --select=$(IFS=","; echo "${enabled[*]}") $(
     if [[ $# == 0 ]]; then
-        git ls-files "*.py"
+        git ls-files "*.py" ':!*/bitcoin_functional/*'
     else
         echo "$@"
     fi