diff --git a/.gitlab/ci/host-test.yml b/.gitlab/ci/host-test.yml
index 3ddacfa27f..9d71c6ec61 100644
--- a/.gitlab/ci/host-test.yml
+++ b/.gitlab/ci/host-test.yml
@@ -245,10 +245,11 @@ test_espcoredump:
     expire_in: 1 week
   variables:
     IDF_COREDUMP_ELF_REPO: "https://gitlab-ci-token:${BOT_TOKEN}@${CI_SERVER_HOST}:${CI_SERVER_PORT}/idf/idf-coredump-elf.git"
+    IDF_COREDUMP_ELF_TAG: idf-20210909-00
     # install CMake version specified in tools.json
     SETUP_TOOLS_LIST: "all"
   script:
-    - retry_failed git clone ${IDF_COREDUMP_ELF_REPO} -b master
+    - retry_failed git clone ${IDF_COREDUMP_ELF_REPO} -b $IDF_COREDUMP_ELF_TAG
     - cd ${IDF_PATH}/components/espcoredump/test/
     - ./test_espcoredump.sh ${CI_PROJECT_DIR}/idf-coredump-elf