diff --git a/.circleci/config.yml b/.circleci/config.yml
index 1c894eba..bb54486f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -201,9 +201,18 @@ jobs:
   update-currency-versions:
     executor:
       name: base
-      ruby_version: "4.0"
+      ruby_version: "3.4"
     steps:
       - checkout
+      - run:
+          name: Install jq and curl
+          command: |
+            apt-get update
+            apt-get install -y jq curl
+      - run:
+          name: Wait for all workflow test suites and retries to finish
+          command: |
+            ./.circleci/wait_for_workflows.sh
       - run:
           name: Update RubyGems and Bundler
           command: |
@@ -214,9 +223,9 @@ jobs:
           name: Capture installed gem versions and test with latest versions
           command: |
             #!/usr/bin/env bash
-            set -e
             mkdir -p bundle-list
             mkdir -p test-results
+            mkdir -p _junit
 
             run_bundle_list_and_test() {
               local label="$1"
@@ -224,16 +233,19 @@ jobs:
               echo "=== Processing $label from $gemfile ==="
               
               # Install dependencies
-              BUNDLE_GEMFILE="$gemfile" bundle check 2>/dev/null \
-                || BUNDLE_GEMFILE="$gemfile" bundle install --quiet
+              if ! (BUNDLE_GEMFILE="$gemfile" bundle check 2>/dev/null || BUNDLE_GEMFILE="$gemfile" bundle install --quiet); then
+                echo "  ✗ bundle install failed for $label"
+                echo "FAIL" > "test-results/${label}_status.txt"
+                return 0
+              fi
               
               # Capture installed versions
-              BUNDLE_GEMFILE="$gemfile" bundle list > "bundle-list/installed_${label}.txt"
-              echo "  Captured $(grep -c '^\s\+\*' bundle-list/installed_${label}.txt) gems"
+              BUNDLE_GEMFILE="$gemfile" bundle list > "bundle-list/installed_${label}.txt" || true
+              echo "  Captured $(grep -c '^\s\+\*' "bundle-list/installed_${label}.txt" 2>/dev/null || echo 0) gems"
               
-              # Run tests to verify the versions work
+              # Run tests with APPRAISAL_INITIALIZED=1 so Rakefile runs only this gem's tests
               echo "  Running tests for $label..."
-              if BUNDLE_GEMFILE="$gemfile" bundle exec rake test 2>&1 | tee "test-results/${label}_test.log"; then
+              if APPRAISAL_INITIALIZED="1" BUNDLE_GEMFILE="$gemfile" bundle exec rake test 2>&1 | tee "test-results/${label}_test.log"; then
                 echo "PASS" > "test-results/${label}_status.txt"
                 echo "  ✓ Tests passed for $label"
               else
@@ -260,6 +272,27 @@ jobs:
             run_bundle_list_and_test "graphql"     "./gemfiles/graphql_20.gemfile"
             run_bundle_list_and_test "roda"        "./gemfiles/roda_30.gemfile"
             run_bundle_list_and_test "net-http"    "./gemfiles/net_http_01.gemfile"
+
+            # Assemble test-status.json in bundle-list directory
+            JSON="{"
+            FIRST=1
+            for STATUS_FILE in test-results/*_status.txt; do
+              [ -f "$STATUS_FILE" ] || continue
+              LABEL=$(basename "$STATUS_FILE" _status.txt)
+              STATUS=$(cat "$STATUS_FILE" | tr -d '[:space:]')
+              if [ "$STATUS" = "FAIL" ]; then
+                [ $FIRST -eq 0 ] && JSON="${JSON},"
+                JSON="${JSON} \"${LABEL}\": \"fail\""
+                FIRST=0
+              fi
+            done
+            JSON="${JSON} }"
+            echo "$JSON" > bundle-list/test-status.json
+
+            echo "=== test-status.json ==="
+            cat bundle-list/test-status.json
+            echo ""
+            ls -la bundle-list/
       - store_artifacts:
           path: bundle-list
       - store_artifacts:
@@ -355,11 +388,11 @@ workflows:
               only:
                 - master
           requires:
-            - lint
-            - test_core-ruby-base-3.2
-            - test_core-ruby-base-3.3
-            - test_core-ruby-base-3.4
-            - test_core-ruby-base-4.0
+            - lint: terminal
+            - test_core-ruby-base-3.2: terminal
+            - test_core-ruby-base-3.3: terminal
+            - test_core-ruby-base-3.4: terminal
+            - test_core-ruby-base-4.0: terminal
   libraries_ruby_32_33:
     max_auto_reruns: 2
     jobs:
diff --git a/.circleci/wait_for_workflows.sh b/.circleci/wait_for_workflows.sh
new file mode 100755
index 00000000..2799ab53
--- /dev/null
+++ b/.circleci/wait_for_workflows.sh
@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+set -e
+
+if [[ -z "${CIRCLE_TOKEN:-}" ]]; then
+  echo "WARNING: CIRCLE_TOKEN is not set. Skipping waiting for sibling workflows."
+  exit 0
+fi
+
+PROJECT_SLUG='https://circleci.com/api/v2/project/gh/instana/ruby-sensor'
+PIPELINE_SLUG='https://circleci.com/api/v2/pipeline'
+WORKFLOW_SLUG='https://circleci.com/api/v2/workflow'
+
+echo "=== Getting Pipeline ID for build #${CIRCLE_BUILD_NUM} ==="
+PIPELINE_ID=$(curl -s \
+  -H "Circle-Token: ${CIRCLE_TOKEN}" \
+  "${PROJECT_SLUG}/job/${CIRCLE_BUILD_NUM}" \
+  | jq -rj '.pipeline.id // empty')
+
+if [[ -z "${PIPELINE_ID}" ]]; then
+  echo "WARNING: Could not retrieve PIPELINE_ID from job info. Proceeding."
+  exit 0
+fi
+
+echo "Pipeline ID: ${PIPELINE_ID}"
+
+echo "=== Querying workflows for pipeline ==="
+WORKFLOW_INFO=$(curl -sf \
+  -H "Circle-Token: ${CIRCLE_TOKEN}" \
+  "${PIPELINE_SLUG}/${PIPELINE_ID}/workflow" \
+  | jq -r '.items[] | select(.name != "core" and .name != "report_coverage" and .name != "publish") | "\(.id)\t\(.name)"')
+
+echo "Discovered test workflows to wait for:"
+echo "${WORKFLOW_INFO}"
+echo ""
+
+# Loop and wait until every sibling workflow reaches a terminal state
+while IFS=$'\t' read -r workflow_id workflow_name; do
+  [[ -z "${workflow_id}" ]] && continue
+
+  echo "Waiting for workflow '${workflow_name}' (${workflow_id}) to complete..."
+  MAX_ATTEMPTS=120  # up to 30 mins (120 * 15s)
+  ATTEMPT=0
+  while [[ ${ATTEMPT} -lt ${MAX_ATTEMPTS} ]]; do
+    STATUS=$(curl -s \
+      -H "Circle-Token: ${CIRCLE_TOKEN}" \
+      "${WORKFLOW_SLUG}/${workflow_id}" \
+      | jq -r '.status // "unknown"')
+    
+    if [[ "${STATUS}" != "running" && "${STATUS}" != "on_hold" && "${STATUS}" != "unknown" ]]; then
+      echo "  ✓ Workflow '${workflow_name}' finished with status: ${STATUS}"
+      break
+    fi
+
+    echo "  ... '${workflow_name}' is currently: ${STATUS} (waiting 15s, attempt $((ATTEMPT+1))/${MAX_ATTEMPTS})"
+    sleep 15
+    ATTEMPT=$((ATTEMPT + 1))
+  done
+done <<< "${WORKFLOW_INFO}"
+
+echo ""
+echo "=== All sibling test workflows have finished (including auto-retries) ==="