diff --git a/envhelp/docker/Dockerfile.py2 b/envhelp/docker/Dockerfile.py2
index 217324fc..d81e9bb4 100644
--- a/envhelp/docker/Dockerfile.py2
+++ b/envhelp/docker/Dockerfile.py2
@@ -1,3 +1,4 @@
+# NOTE: we use upstream python-2 image to mimic the version on CentOS/RHEL 7
 FROM python:2
 
 WORKDIR /usr/src/app
diff --git a/envhelp/docker/Dockerfile.py3 b/envhelp/docker/Dockerfile.py3
index c0aeeb9d..5da39fe5 100644
--- a/envhelp/docker/Dockerfile.py3
+++ b/envhelp/docker/Dockerfile.py3
@@ -1,3 +1,4 @@
+# NOTE: we use upstream python-3.9 image to mimic the version on RHEL/Rocky 9
 FROM python:3.9
 
 WORKDIR /usr/src/app
diff --git a/envhelp/makeconfig.py b/envhelp/makeconfig.py
index 0d1941b8..7e95a6d0 100644
--- a/envhelp/makeconfig.py
+++ b/envhelp/makeconfig.py
@@ -65,7 +65,7 @@ def write_testconfig(env_name, is_docker=False):
         'destination_suffix': "-%s" % (confs_suffix,),
     }
 
-    # determine the paths b which we will access the various configured dirs
+    # determine the paths by which we will access the various configured dirs
     #  the tests output directory - when invoked within
 
     if is_predefined and is_docker:
diff --git a/envhelp/python3 b/envhelp/python3
index 9584a6dc..5f220201 100755
--- a/envhelp/python3
+++ b/envhelp/python3
@@ -2,7 +2,7 @@
 #
 # --- BEGIN_HEADER ---
 #
-# python2 - wrap python2 docker container for testing
+# python3 - wrap python3 docker container for testing
 # Copyright (C) 2003-2024  The MiG Project by the Science HPC Center at UCPH
 #
 # This file is part of MiG.