diff --git a/.github/workflows/unit_tests_macos.yml b/.github/workflows/unit_tests_macos.yml
index b6f6517..507ddba 100644
--- a/.github/workflows/unit_tests_macos.yml
+++ b/.github/workflows/unit_tests_macos.yml
@@ -1,3 +1,5 @@
+# "paths-ignore" should be in line with unit_tests_ubuntu.yml
+# and shellcheck.yml
 ---
 name: CI run MacOS
 
diff --git a/.github/workflows/unit_tests_ubuntu.yml b/.github/workflows/unit_tests_ubuntu.yml
index a95bb7b..fd116ae 100644
--- a/.github/workflows/unit_tests_ubuntu.yml
+++ b/.github/workflows/unit_tests_ubuntu.yml
@@ -1,3 +1,5 @@
+# "paths-ignore" should be in line with unit_tests_macos.yml
+# and shellcheck.yml
 ---
 name: CI run Ubuntu