diff --git a/.github/workflows/linux_builds.yml b/.github/workflows/linux_builds.yml
index b77cea4756..85418032f1 100644
--- a/.github/workflows/linux_builds.yml
+++ b/.github/workflows/linux_builds.yml
@@ -208,3 +208,11 @@ jobs:
           echo "----- Run and test project -----"
           DRI_PRIME=0 xvfb-run bin/godot.x11.tools.64s 30 --video-driver GLES3 --audio-driver Dummy --path test_project 2>&1 | tee sanitizers_log.txt || true
           misc/scripts/check_ci_log.py sanitizers_log.txt
+
+      # Check class reference
+      - name: Check for class reference updates
+        run: |
+          echo "Running --doctool to see if this changes the public API without updating the documentation."
+          echo -e "If a diff is shown, it means that your code/doc changes are incomplete and you should update the class reference with --doctool.\n\n"
+          DRI_PRIME=0 xvfb-run bin/godot.x11.tools.64s --doctool . 2>&1 > /dev/null || true
+          git diff --color --exit-code