From 7dda912e1c28b02723c9f24fa6c4e9003d928978 Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Fri, 5 Jun 2020 08:50:34 +0300
Subject: [PATCH 1/2] test: Do not swallow flake8 exit code

---
 test/lint/lint-python.sh | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/test/lint/lint-python.sh b/test/lint/lint-python.sh
index b9aa6c799b..decea38c4f 100755
--- a/test/lint/lint-python.sh
+++ b/test/lint/lint-python.sh
@@ -90,12 +90,20 @@ elif PYTHONWARNINGS="ignore" flake8 --version | grep -q "Python 2"; then
     exit 0
 fi
 
-PYTHONWARNINGS="ignore" flake8 --ignore=B,C,E,F,I,N,W --select=$(IFS=","; echo "${enabled[*]}") $(
+EXIT_CODE=0
+
+if ! PYTHONWARNINGS="ignore" flake8 --ignore=B,C,E,F,I,N,W --select=$(IFS=","; echo "${enabled[*]}") $(
     if [[ $# == 0 ]]; then
         git ls-files "*.py"
     else
         echo "$@"
     fi
-)
+); then
+    EXIT_CODE=1
+fi
 
-mypy --ignore-missing-imports $(git ls-files "test/functional/*.py")
\ No newline at end of file
+if ! mypy --ignore-missing-imports $(git ls-files "test/functional/*.py"); then
+    EXIT_CODE=1
+fi
+
+exit $EXIT_CODE

From 5d77549d8b287eb773db695b88c165ebe3be1005 Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Fri, 5 Jun 2020 09:06:19 +0300
Subject: [PATCH 2/2] doc: Add mypy to test dependencies

---
 test/README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/README.md b/test/README.md
index 0210907878..b036a66f67 100644
--- a/test/README.md
+++ b/test/README.md
@@ -261,6 +261,7 @@ Use the `-v` option for verbose output.
 | Lint test | Dependency | Version [used by CI](../ci/lint/04_install.sh) | Installation
 |-----------|:----------:|:-------------------------------------------:|--------------
 | [`lint-python.sh`](lint/lint-python.sh) | [flake8](https://gitlab.com/pycqa/flake8) | [3.7.8](https://github.com/bitcoin/bitcoin/pull/15257) | `pip3 install flake8==3.7.8`
+| [`lint-python.sh`](lint/lint-python.sh) | [mypy](https://github.com/python/mypy) | [0.700](https://github.com/bitcoin/bitcoin/pull/18210) | `pip3 install mypy==0.700`
 | [`lint-shell.sh`](lint/lint-shell.sh) | [ShellCheck](https://github.com/koalaman/shellcheck) | [0.6.0](https://github.com/bitcoin/bitcoin/pull/15166) | [details...](https://github.com/koalaman/shellcheck#installing)
 | [`lint-shell.sh`](lint/lint-shell.sh) | [yq](https://github.com/kislyuk/yq) | default | `pip3 install yq`
 | [`lint-spelling.sh`](lint/lint-spelling.sh) | [codespell](https://github.com/codespell-project/codespell) | [1.15.0](https://github.com/bitcoin/bitcoin/pull/16186) | `pip3 install codespell==1.15.0`