diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e420ec6..19e3392 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,9 +6,11 @@ name: CI
 on:
   pull_request:
     branches:
+      - master
       - b_3.x
   push:
     branches:
+      - master
       - b_3.x
     tags:
       - v*
diff --git a/Makefile b/Makefile
index fc9a6ea..a9241e0 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ tests:
 format:
 	tox -e format
 
-LYPY_COMMIT_RANGE ?= origin/master..
+LYPY_COMMIT_RANGE ?= origin/b_3.x..
 
 check-commits:
 	./check-commits.sh $(LYPY_COMMIT_RANGE)
diff --git a/tox.ini b/tox.ini
index 524ad49..895ba55 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,6 +14,8 @@ install_command = {toxinidir}/tox-install.sh {envdir} {opts} {packages}
 allowlist_externals =
 	{toxinidir}/tox-install.sh
 commands = python -Wd -m unittest discover -c
+setenv =
+	LIBYANG_BRANCH=v3.13.6 # On v3 branch test using last libyang v3 release
 
 [testenv:lydevel]
 setenv =