diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 34a99352..22d92277 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,8 @@ jobs:
     runs-on: ubuntu-latest
     env:
       KEYMANHOSTS_TIER: TIER_TEST
+      CONTAINER_DESC: keyman-com-app
+      CONTAINER_PORT: 8053
 
     steps:
     - name: Checkout
@@ -22,53 +24,61 @@ jobs:
         fail-fast: true
 
     #
-    # Finally, run the tests
+    # Run tests -- these step definitions are NEARLY identical across:
+    #   help.keyman.com, keyman.com, keymanweb.com, api.keyman.com
     #
+    # Difference: testPath and skipPaths are different for do_test_links on this site
+    #
+    - name: Test setup
+      shell: bash
+      run: |
+        source ./_common/tests.inc.sh
+        set -e
+        do_test_record_start_time
+        echo "TEST_START_TIME=${TEST_START_TIME}" >> "$GITHUB_ENV"
+
     - name: PHP test
+      if: ${{ !cancelled() }}
       shell: bash
       run: |
-        docker exec keyman-com-app sh -c "vendor/bin/phpunit --testdox"
+        source ./_common/tests.inc.sh
+        set -e
+        do_test_unit_tests "$CONTAINER_DESC"
 
     - name: Lint
+      if: ${{ !cancelled() }}
       shell: bash
       run: |
-        ( set +e; set +o pipefail; find . -name '*.php' | grep -v '/vendor/' | xargs -n 1 -d '\n' php -l | grep -v "No syntax errors detected"; exit ${PIPESTATUS[2]} )
+        source ./_common/tests.inc.sh
+        set -e
+        do_test_lint "$CONTAINER_DESC"
 
     - name: Check broken links
+      if: ${{ !cancelled() }}
       shell: bash
-      continue-on-error: false
       run: |
-        set +e
-        set +o pipefail
-        readarray -t ignoresArray <<< $(find ./_includes/locale/strings/keyboards/ -maxdepth 1 -name '*.php' ! -name "en.php" \
-          -execdir basename  {} .php ';')
-        baseURL="http://localhost:8053"
-        ignoreStr=("  --exclude ${baseURL}*downloads/releases/*")
-        for locale in "${ignoresArray[@]}"; do
-          ignoreStr+=" --exclude ${baseURL}/${locale}/*"
-        done
-        echo "ignoreStr: ${ignoreStr[@]}"
-        npx broken-link-checker ${baseURL}/_test --recursive --ordered ---host-requests 50 -e --filter-level 3 ${ignoreStr} | tee blc.log
-        echo "BLC_RESULT=${PIPESTATUS[0]}" >> "$GITHUB_ENV"
+        source ./_common/tests.inc.sh
+        set -e
+
+        # following two lines match do_test_docker_container in build.sh
+        ignoreLocales="$(jq -r 'keys | map(select(. != "en")) | join("|")' ./_includes/locale/locales.json)"
+        do_test_links "http://localhost:${CONTAINER_PORT}" "/_test" "/(${ignoreLocales})"  "/en/downloads/releases/"
+
+      # We split the reporting of broken links into a separate step for ease of
+      # viewing because the broken links are otherwise hidden in a sea of good
+      # links in a very long report
 
     - name: Report on broken links
+      if: ${{ !cancelled() }}
       run: |
-        set +e
-        set +o pipefail
-        cat blc.log | \
-          grep -E "BROKEN|Getting links from" | \
-          grep -B 1 "BROKEN";
-        exit "${BLC_RESULT}"
+        source ./_common/tests.inc.sh
+        set -e
+        do_test_print_link_report
 
     - name: Check PHP errors
+      if: ${{ !cancelled() }}
       shell: bash
       run: |
-        CONTAINER=`docker container ls -l -q`
-        if docker container logs $CONTAINER 2>&1 | grep -q 'php7'; then
-          echo 'PHP reported errors or warnings:'
-          docker container logs $CONTAINER 2>&1 | grep 'php7'
-          exit 1
-        else
-          echo 'No PHP errors found'
-          exit 0
-        fi
+        source ./_common/tests.inc.sh
+        set -e
+        do_test_print_container_error_logs "$CONTAINER_DESC"
diff --git a/.gitignore b/.gitignore
index 342702fe..d689b874 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,7 +5,7 @@ cdn/deploy/
 tier.txt
 
 # unit test artifacts
-blc.log
+linkinator-results.json
 .phpunit.result.cache
 
 vendor*
@@ -21,4 +21,4 @@ _common/
 _control/debug
 
 # .htaccess is generated from .htaccess.in during build.sh build
-.htaccess
\ No newline at end of file
+.htaccess
diff --git a/build.sh b/build.sh
index 24390f81..587d74d5 100755
--- a/build.sh
+++ b/build.sh
@@ -2,7 +2,7 @@
 ## START STANDARD SITE BUILD SCRIPT INCLUDE
 readonly THIS_SCRIPT="$(readlink -f "${BASH_SOURCE[0]}")"
 readonly BOOTSTRAP="$(dirname "$THIS_SCRIPT")/resources/bootstrap.inc.sh"
-readonly BOOTSTRAP_VERSION=v1.0.13
+readonly BOOTSTRAP_VERSION=feat/linkinator-and-central-test-script
 if ! [ -f "$BOOTSTRAP" ] || ! source "$BOOTSTRAP"; then
   curl -H "Cache-Control: no-cache" --fail --silent --show-error -w "curl: Finished attempt to download %{url}" "https://raw.githubusercontent.com/keymanapp/shared-sites/$BOOTSTRAP_VERSION/bootstrap.inc.sh" -o "$BOOTSTRAP.tmp" || exit 1
   source "$BOOTSTRAP.tmp"
@@ -28,6 +28,9 @@ builder_describe \
   start \
   stop \
   test \
+  "--no-unit-test" \
+  "--no-lint" \
+  "--no-link-check" \
   htaccess "rebuild .htaccess from .htaccess.in (for development)"
 
 builder_parse "$@"
@@ -52,51 +55,22 @@ function do_start() {
   start_docker_container $KEYMAN_IMAGE_NAME $KEYMAN_CONTAINER_NAME $KEYMAN_CONTAINER_DESC $HOST_KEYMAN_COM $PORT_KEYMAN_COM $BUILDER_CONFIGURATION
 }
 
-function test_docker_container() {
-  # Note: ci.yml replicates these
-
-  echo "TIER_TEST" > tier.txt
-  set +e;
-  set +o pipefail;
-
-  builder_echo blue "---- PHP unit tests"
-  docker exec $KEYMAN_CONTAINER_DESC sh -c "vendor/bin/phpunit --testdox"
-
-  # Lint .php files for obvious errors
-  builder_echo blue "---- Lint PHP files"
-  docker exec $KEYMAN_CONTAINER_DESC sh -c "find . -name '*.php' | grep -v '/vendor/' | xargs -n 1 -d '\\n' php -l"
-
+function do_test_docker_container() {
   # NOTE: link checker runs on host rather than in docker image
-  builder_echo blue "---- Testing links"
+  local ignoreLocales
 
-  # determine non-en locales to ignore along with /downloads/releases
-  readarray -t ignoresArray <<< $(find ./_includes/locale/strings/keyboards/ -maxdepth 1 -name '*.php' ! -name "en.php" \
-    -execdir basename  {} .php ';')
-  local baseURL="http://localhost:8053"
-  local ignoreStr=("  --exclude ${baseURL}*/downloads/releases/*")
-  for locale in "${ignoresArray[@]}"; do
-    ignoreStr+=" --exclude ${baseURL}/${locale}/*"
-  done
-  echo "ignoreStr: ${ignoreStr[@]}"
-  npx broken-link-checker ${baseURL}/_test --recursive --ordered ---host-requests 50 -e --filter-level 3 ${ignoreStr} | tee blc.log
-  local BLC_RESULT=${PIPESTATUS[0]}
-  echo ----------------------------------------------------------------------
-  echo Link check summary
-  echo ----------------------------------------------------------------------
-  cat blc.log | \
-    grep -E "BROKEN|Getting links from" | \
-    grep -B 1 "BROKEN";
+  # determine non-en locales to ignore
+  ignoreLocales="$(jq -r 'keys | map(select(. != "en")) | join("|")' ./_includes/locale/locales.json)"
 
-  builder_echo blue "Done checking links"
-  rm tier.txt
-  return "${BLC_RESULT}"
+  test_docker_container $KEYMAN_CONTAINER_DESC $PORT_KEYMAN_COM "/_test" "/(${ignoreLocales})"  "/en/downloads/releases/"
 }
 
+
 builder_run_action configure  do_configure
 builder_run_action clean      clean_docker_container $KEYMAN_IMAGE_NAME $KEYMAN_CONTAINER_NAME
 builder_run_action stop       stop_docker_container  $KEYMAN_IMAGE_NAME $KEYMAN_CONTAINER_NAME
 builder_run_action build      build_docker_container $KEYMAN_IMAGE_NAME $KEYMAN_CONTAINER_NAME $BUILDER_CONFIGURATION
 builder_run_action start      do_start
 
-builder_run_action test       test_docker_container
+builder_run_action test       do_test_docker_container
 builder_run_action htaccess   preprocess_htaccess