diff --git a/.buildkite/pipelines/periodic.template.yml b/.buildkite/pipelines/periodic.template.yml
index a9e0bbd9291d6..dc02e4a44e816 100644
--- a/.buildkite/pipelines/periodic.template.yml
+++ b/.buildkite/pipelines/periodic.template.yml
@@ -232,7 +232,7 @@ steps:
       image: family/elasticsearch-ubuntu-2404
       machineType: n2-standard-8
       buildDirectory: /dev/shm/bk
-    if: build.branch =~ /^(main|\d+\.\d+|\d+\.x)$/
+    if: build.branch =~ /^(main|\d+\.\d+|\d+\.x)$$/
   - label: check-branch-consistency
     command: .ci/scripts/run-gradle.sh branchConsistency
     timeout_in_minutes: 15
diff --git a/.buildkite/pipelines/periodic.yml b/.buildkite/pipelines/periodic.yml
index f293097a1f8d8..7cd3f48541137 100644
--- a/.buildkite/pipelines/periodic.yml
+++ b/.buildkite/pipelines/periodic.yml
@@ -613,7 +613,7 @@ steps:
       image: family/elasticsearch-ubuntu-2404
       machineType: n2-standard-8
       buildDirectory: /dev/shm/bk
-    if: build.branch =~ /^(main|\d+\.\d+|\d+\.x)$/
+    if: build.branch =~ /^(main|\d+\.\d+|\d+\.x)$$/
   - label: check-branch-consistency
     command: .ci/scripts/run-gradle.sh branchConsistency
     timeout_in_minutes: 15