diff -r da7b461f54b7 -r 0af7b6a96c53 .github/workflows/run_tests_in_docker.yml
--- a/.github/workflows/run_tests_in_docker.yml	Sun Jul 17 18:07:46 2022 +0200
+++ b/.github/workflows/run_tests_in_docker.yml	Sun Jul 17 18:17:43 2022 +0200
@@ -21,6 +21,13 @@
           ref: 2a25f4dbf4e2b1e017a3a583db7dede4771fe523
           path: matiec
 
+    - uses: actions/checkout@v3
+      with:
+          repository: open62541/open62541
+          ref: v3.0.2
+          path: open62541
+          submodules: recursive
+
     - name: Cache docker image
       id: cache-docker
       uses: actions/cache@v3