diff --git a/CHANGES.txt b/CHANGES.txt
index ac19ca2..474e76a 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -12,6 +12,8 @@ Changelog
 
 - Removed useless files and moved script to scripts.
   [sgeulette]
+- Upgraded robot test stack to the last python 2.7 releases (PARAF-166).
+  [chris-adam]
 - Upgraded collective.behavior.talcondition 1.1.3
     - In case an error occurs, output more informations to the log.
 - Upgraded collective.classification.folder 1.3.1
diff --git a/Makefile b/Makefile
index c8d3a72..2c41d81 100644
--- a/Makefile
+++ b/Makefile
@@ -149,7 +149,7 @@ robot-server:  ## Starts robot server
 doc:  ## Runs `doc.robot` (opt='-i "RUN1"')
 	# can be run by example with: make doc opt='-t "Contacts *"' or make doc opt='-i "RUN1"'  (or -e to exclude)
 	# env ZSERVER_HOST=localhost ZSERVER_PORT=55001 bin/robot -l NONE -r NONE $(opt) src/imio.dms.mail/imio/dms/mail/tests/robot/doc.robot
-	env ZSERVER_HOST=localhost ZSERVER_PORT=55001 bin/robot -r NONE $(opt) src/imio.dms.mail/imio/dms/mail/tests/robot/doc.robot
+	env ZSERVER_HOST=localhost ZSERVER_PORT=55001 MOZ_HEADLESS=1 bin/robot -r NONE $(opt) src/imio.dms.mail/imio/dms/mail/tests/robot/doc.robot
 	rm geckodriver*.log
 
 .PHONY: video-doc
diff --git a/test.cfg b/test.cfg
index 422e8b5..81ac3eb 100644
--- a/test.cfg
+++ b/test.cfg
@@ -165,19 +165,26 @@ collective.MockMailHost = 1.1.0
 plone.app.relationfield = 1.2.3
 # 1.2 last compatible with plone 4
 plone.app.robotframework = 1.2.4
-# last working with debug
-robotframework = 3.0.4
-# last compatible with plone 4
+# 4.1.3 = last release supporting python 2.7 (5.0 is py3 only), but 4.0 removed the
+# ':FOR' loop and '@{list}[i]' syntax still used by robotframework-selenium2screenshots
+# 0.8.1 and by the plone.app.robotframework 1.2.x fork, so we stay on 3.2.2.
+robotframework = 3.2.2
+# 1.3.1 = last release supporting python 2.7 (2.0 is py3 only)
 robotframework-debuglibrary = 1.3.1
-robotframework-pythonlibcore = 2.1.0
-# last working with debug
-robotframework-seleniumlibrary = 4.3.0
+# 2.2.1 = last release supporting python 2.7 (3.0 is py3 only)
+robotframework-pythonlibcore = 2.2.1
+# 4.5.0 = last release supporting python 2.7 (5.0 is py3 only)
+robotframework-seleniumlibrary = 4.5.0
+# 3.0.0 = last release, thin wrapper over seleniumlibrary
 robotframework-selenium2library = 3.0.0
+# 0.8.1 = last release
 robotframework-selenium2screenshots = 0.8.1
-robotsuite = 2.2.1
+# 2.3.2 = last release supporting python 2.7 (3.0 needs py3.9+)
+robotsuite = 2.3.2
+# 3.141.0 = last release supporting python 2.7 (4.0 needs py3.7+)
 selenium = 3.141.0
 Sphinx = 1.8.5
-sphinxcontrib-robotframework = 0.8.0
+sphinxcontrib-robotframework = 0.8.1
 # watchdog = 0.10.7
 
 # Required by: