diff --git a/tests/dev-lead/integration/test_concurrency_config.sh b/tests/dev-lead/integration/test_concurrency_config.sh
index 3d546f983..a5415cd94 100644
--- a/tests/dev-lead/integration/test_concurrency_config.sh
+++ b/tests/dev-lead/integration/test_concurrency_config.sh
@@ -24,8 +24,7 @@ FAIL=0
 check_concurrency_field() {
   local file="$1" pattern="$2" label="$3"
   local block
-  block=$(awk '/^concurrency:/{found=1} found && /^[a-z]/ && !/^concurrency:/{found=0} found{print}' "$file" \
-    | grep -v '^\s*#')
+  block=$(awk '/^concurrency:/{found=1} found && /^[a-z]/ && !/^concurrency:/{found=0} found && !/^[[:space:]]*#/{print}' "$file")
   if printf '%s\n' "$block" | grep -qF "$pattern"; then
     echo "PASS [$label]: '$pattern' present in concurrency YAML of $(basename "$file")"
   else
@@ -42,11 +41,10 @@ check_concurrency_field() {
 check_concurrency_order() {
   local file="$1" before="$2" after="$3" label="$4"
   local block
-  block=$(awk '/^concurrency:/{found=1} found && /^[a-z]/ && !/^concurrency:/{found=0} found{print}' "$file" \
-    | grep -v '^\s*#')
+  block=$(awk '/^concurrency:/{found=1} found && /^[a-z]/ && !/^concurrency:/{found=0} found && !/^[[:space:]]*#/{print}' "$file")
   local line_before line_after
-  line_before=$(printf '%s\n' "$block" | grep -nF "$before" | head -1 | cut -d: -f1)
-  line_after=$(printf '%s\n' "$block" | grep -nF "$after" | head -1 | cut -d: -f1)
+  line_before=$(printf '%s\n' "$block" | awk -v pat="$before" 'index($0, pat){print NR; exit}')
+  line_after=$(printf '%s\n' "$block" | awk -v pat="$after" 'index($0, pat){print NR; exit}')
   if [[ -z "$line_before" || -z "$line_after" ]]; then
     echo "FAIL [$label]: '$before' or '$after' not found in concurrency YAML of $file"
     FAIL=$((FAIL + 1))
diff --git a/tests/dev-lead/unit/test_concurrency_config.bats b/tests/dev-lead/unit/test_concurrency_config.bats
new file mode 100644
index 000000000..554ab38e6
--- /dev/null
+++ b/tests/dev-lead/unit/test_concurrency_config.bats
@@ -0,0 +1,167 @@
+#!/usr/bin/env bats
+# Unit tests for tests/dev-lead/integration/test_concurrency_config.sh
+#
+# Regression guard for the silent-exit bug: when a workflow file has no
+# concurrency block, grep -v '^\s*#' on empty input exits 1. With
+# set -euo pipefail active, bash triggers set -e on the block=$(...|grep)
+# assignment in non-interactive (script) mode, causing test_concurrency_config.sh
+# to exit silently (no FAIL messages, no diagnostic output) — making failures
+# look like infra noise rather than real test failures.
+
+SCRIPT_DIR="$(cd "$(dirname "$BATS_TEST_FILENAME")/../../.." && pwd)"
+readonly SCRIPT_DIR
+CONCURRENCY_TEST="$SCRIPT_DIR/tests/dev-lead/integration/test_concurrency_config.sh"
+readonly CONCURRENCY_TEST
+
+setup() {
+  WORK_DIR="$(mktemp -d)" || {
+    echo "ERROR: Failed to create temporary directory" >&2
+    exit 1
+  }
+  mkdir -p "$WORK_DIR/.github/workflows"
+  # Run the script from WORK_DIR so its relative .github/workflows/ paths resolve
+  pushd "$WORK_DIR" > /dev/null || {
+    echo "ERROR: Failed to change to test directory" >&2
+    exit 1
+  }
+}
+
+teardown() {
+  popd > /dev/null 2>&1 || true
+  if [ -n "${WORK_DIR:-}" ]; then
+    rm -rf "$WORK_DIR"
+  fi
+}
+
+_write_proper_reusable() {
+  cat > "$WORK_DIR/.github/workflows/dev-lead-reusable.yml" << 'YAML'
+name: Dev-Lead Agent (Reusable)
+on:
+  workflow_call: {}
+permissions: {}
+concurrency:
+  group: >-
+    ${{
+      (github.event_name == 'check_run' && format('dev-lead-ci-relay-{0}', github.event.check_run.head_sha))
+      || (github.event.pull_request.number && format('dev-lead-pr-{0}', github.event.pull_request.number))
+      || (github.event.issue.pull_request && format('dev-lead-pr-{0}', github.event.issue.number))
+      || (github.event.issue.number && format('dev-lead-issue-{0}', github.event.issue.number))
+      || (github.event.client_payload.pr_number && format('dev-lead-pr-{0}', github.event.client_payload.pr_number))
+      || format('dev-lead-run-{0}', github.run_id)
+    }}
+  cancel-in-progress: false
+jobs:
+  dispatch:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo ok
+YAML
+}
+
+_write_proper_inline() {
+  cat > "$WORK_DIR/.github/workflows/dev-lead.yml" << 'YAML'
+name: Dev-Lead Agent
+on:
+  issues:
+    types: [labeled]
+permissions:
+  contents: write
+concurrency:
+  group: >-
+    ${{
+      (github.event_name == 'check_run' && format('dev-lead-ci-relay-{0}', github.event.check_run.head_sha))
+      || (github.event.pull_request.number && format('dev-lead-pr-{0}', github.event.pull_request.number))
+      || (github.event.issue.pull_request && format('dev-lead-pr-{0}', github.event.issue.number))
+      || (github.event.issue.number && format('dev-lead-issue-{0}', github.event.issue.number))
+      || (github.event.client_payload.pr_number && format('dev-lead-pr-{0}', github.event.client_payload.pr_number))
+      || format('dev-lead-run-{0}', github.run_id)
+    }}
+  cancel-in-progress: false
+jobs:
+  dispatch:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo ok
+YAML
+}
+
+# ── silent-exit regression tests ─────────────────────────────────────────────
+
+@test "concurrency-config: exit 1 with FAIL output when dev-lead.yml has no concurrency block" {
+  # Stub caller — intentionally no concurrency block at all
+  cat > "$WORK_DIR/.github/workflows/dev-lead.yml" << 'YAML'
+name: Dev-Lead Agent
+on:
+  issues:
+    types: [labeled]
+permissions: {}
+jobs:
+  dev-lead:
+    uses: petry-projects/.github-private/.github/workflows/dev-lead-reusable.yml@main
+    secrets: inherit
+YAML
+  _write_proper_reusable
+
+  run bash "$CONCURRENCY_TEST"
+
+  [ "$status" -eq 1 ]
+  # Must produce FAIL output — not a silent exit
+  [[ "$output" =~ "FAIL" ]]
+}
+
+@test "concurrency-config: exit 1 with FAIL output when dev-lead.yml concurrency block is comments-only" {
+  # Concurrency section exists but all content lines are comments — effectively empty
+  cat > "$WORK_DIR/.github/workflows/dev-lead.yml" << 'YAML'
+name: Dev-Lead Agent
+on:
+  issues:
+    types: [labeled]
+concurrency:
+  # This comment-only block should not satisfy any assertion
+  # group: intentionally omitted
+  # cancel-in-progress: intentionally omitted
+jobs:
+  dispatch:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo ok
+YAML
+  _write_proper_reusable
+
+  run bash "$CONCURRENCY_TEST"
+
+  [ "$status" -eq 1 ]
+  [[ "$output" =~ "FAIL" ]]
+}
+
+@test "concurrency-config: exit 1 with FAIL output when dev-lead-reusable.yml has no concurrency block" {
+  _write_proper_inline
+  cat > "$WORK_DIR/.github/workflows/dev-lead-reusable.yml" << 'YAML'
+name: Dev-Lead Agent (Reusable)
+on:
+  workflow_call: {}
+permissions: {}
+jobs:
+  dispatch:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo ok
+YAML
+
+  run bash "$CONCURRENCY_TEST"
+
+  [ "$status" -eq 1 ]
+  [[ "$output" =~ "FAIL" ]]
+}
+
+# ── passing baseline ──────────────────────────────────────────────────────────
+
+@test "concurrency-config: passes when both files have correct concurrency config" {
+  _write_proper_inline
+  _write_proper_reusable
+
+  run bash "$CONCURRENCY_TEST"
+
+  [ "$status" -eq 0 ]
+  [[ "$output" =~ "All concurrency config checks passed." ]]
+}