diff --git a/.github/workflows/GnuTests.yml b/.github/workflows/GnuTests.yml
index 4afa7daf3..15537d8b3 100644
--- a/.github/workflows/GnuTests.yml
+++ b/.github/workflows/GnuTests.yml
@@ -167,6 +167,7 @@ jobs:
         have_new_failures=""
         REF_LOG_FILE='${{ steps.vars.outputs.path_reference }}/test-logs/test-suite.log'
         REF_SUMMARY_FILE='${{ steps.vars.outputs.path_reference }}/test-summary/gnu-result.json'
+        REPO_DEFAULT_BRANCH='${{ steps.vars.outputs.repo_default_branch }}'
         if test -f "${REF_LOG_FILE}"; then
           echo "Reference SHA1/ID: $(sha1sum -- "${REF_SUMMARY_FILE}")"
           REF_FAILING=$(sed -n "s/^FAIL: \([[:print:]]\+\).*/\1/p" "${REF_LOG_FILE}" | sort)
diff --git a/util/compare_gnu_result.py b/util/compare_gnu_result.py
index cfd33ea4c..9501f4f5f 100755
--- a/util/compare_gnu_result.py
+++ b/util/compare_gnu_result.py
@@ -9,6 +9,8 @@ import json
 import sys
 from os import environ
 
+REPO_DEFAULT_BRANCH = environ.get('REPO_DEFAULT_BRANCH', 'main')
+
 NEW = json.load(open("gnu-result.json"))
 OLD = json.load(open("main-gnu-result.json"))
 
@@ -24,12 +26,12 @@ skip_d = int(current["skip"]) - int(last["skip"])
 
 # Get an annotation to highlight changes
 print(
-    f"::warning ::Changes from main: PASS {pass_d:+d} / FAIL {fail_d:+d} / ERROR {error_d:+d} / SKIP {skip_d:+d} "
+    f"::warning ::Changes from '{REPO_DEFAULT_BRANCH}': PASS {pass_d:+d} / FAIL {fail_d:+d} / ERROR {error_d:+d} / SKIP {skip_d:+d} "
 )
 
 # If results are worse fail the job to draw attention
 if pass_d < 0:
     print(
-        f"::error ::PASS count is reduced from main: PASS {pass_d:+d} "
+        f"::error ::PASS count is reduced from '{REPO_DEFAULT_BRANCH}': PASS {pass_d:+d} "
     )
     sys.exit(1)