diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7170408..747d70c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,7 +5,7 @@ stages:
 
 before_script:
   - apt-get update
-  - apt-get install -y bash shellcheck
+  - apt-get install -y bash pylint3 shellcheck
 
 test:
   stage: test
diff --git a/src/maintainers b/src/maintainers
index ddf87c2..f041c7d 100755
--- a/src/maintainers
+++ b/src/maintainers
@@ -1,5 +1,17 @@
 #!/usr/bin/env python
 
+"""
+Original author: XGQT
+Licensed under the ISC License
+Copyright (c) 2020, src_prepare group
+
+How to use:
+ - cd into the repository root:
+   $ pwd
+   => /home/user/git/src_prepare-overlay/app-admin/
+   cd ..
+ - run this script
+"""
 
 import os
 import os.path
diff --git a/test.sh b/test.sh
index 2e33377..3933582 100755
--- a/test.sh
+++ b/test.sh
@@ -1,23 +1,41 @@
 #!/bin/sh
 
 
+# Original author: XGQT
+# Licensed under the ISC License
+# Copyright (c) 2020, src_prepare group
+
+
+# $1 - code check tool
+# $2 - files to check (quoed list)
+# Examples:
+#  - run_test shellcheck "src/check-commit src/repomanci"
+#  - run_test pylint "${py_files}"
+
 exit_result=0
-files="$(grep -R --exclude-dir='.git' '^#!/.*sh$' 2>/dev/null | cut -d ':' -f 1)"
+
+run_test() {
+    for file in ${2}
+    do
+        echo "File ${file}... checking"
+        if command "${1}" "${file}"
+        then
+            echo "    file is correct"
+        else
+            echo "    there were errors found in the file"
+            exit_result=1
+        fi
+        echo "Done: ${file}"
+        echo
+    done
+}
 
 
-for file in ${files}
-do
-    echo "File ${file}... checking"
-    if shellcheck "${file}"
-    then
-        echo "    file is correct"
-    else
-        echo "    there were errors found in the file"
-        exit_result=1
-    fi
-    echo "Done: ${file}"
-    echo
-done
+sh_files="$(grep -R --exclude-dir='.git' '^#!/.*sh$' 2>/dev/null | cut -d ':' -f 1)"
+py_files="$(grep -R --exclude-dir='.git' '^#!/.*python$' 2>/dev/null | cut -d ':' -f 1)"
+
+run_test shellcheck "${sh_files}"
+run_test pylint "${py_files}"
 
 if [ ${exit_result} = 0 ]
 then