diff --git a/.github/workflows/perf_sysbench.yml b/.github/workflows/perf_sysbench.yml
index dab15dd6e8fe29a917efdebf877b5bddf5ab1ed4..c8ea0645f459a1956e216b4828de36f80aca235f 100644
--- a/.github/workflows/perf_sysbench.yml
+++ b/.github/workflows/perf_sysbench.yml
@@ -129,7 +129,7 @@ jobs:
           server_address: ${{ secrets.PERF_EMAIL_SERVER }}
           server_port: 25
           subject: >
-            Tarantool Perf Testing. Branch: ${{ github.ref_name }}.
+            Tarantool Perf Testing. Branch: ${{ matrix.branch }}.
             Build: ${{ steps.tarantool-version.outputs.value }}.
             Test: sysbench
           to: ${{ github.event.inputs.debug == 'true' &&