diff --git a/arcanist_util/config/FacebookArcanistConfiguration.php b/arcanist_util/config/FacebookArcanistConfiguration.php
index c3454903b..e9f4b0828 100644
--- a/arcanist_util/config/FacebookArcanistConfiguration.php
+++ b/arcanist_util/config/FacebookArcanistConfiguration.php
@@ -10,13 +10,112 @@ class FacebookArcanistConfiguration extends ArcanistConfiguration {
                                  ArcanistBaseWorkflow $workflow,
                                  $error_code) {
     if ($command == 'diff' && !$workflow->isRawDiffSource()) {
-      $this->maybePushToJenkins($workflow);
+      $this->startTestsInJenkins($workflow);
+      $this->startTestsInSandcastle($workflow);
     }
   }
 
+  //////////////////////////////////////////////////////////////////////
+  /*  Run tests in sandcastle */
+  function getSteps($diffID, $username) {
+    $arcrc_content = exec("cat ~/.arcrc | base64 -w0");
+
+    $setup = array(
+      "name" => "Setup arcrc",
+      "shell" => "echo " . $arcrc_content . " | base64 --decode > ~/.arcrc",
+      "user" => "root"
+    );
+
+    $fix_permission = array(
+      "name" => "Fix environment",
+      "shell" => "chmod 600 ~/.arcrc",
+      "user" => "root"
+    );
+
+    $fix_git_ignore = array(
+      "name" => "Fix git ignore",
+      "shell" => "echo fbcode >> .git/info/exclude",
+      "user" => "root"
+    );
+
+    $patch = array(
+      "name" => "Patch " . $diffID,
+      "shell" => "HTTPS_PROXY=fwdproxy:8080 arc --arcrc-file ~/.arcrc "
+                  . "patch D" . $diffID . " || rm -f ~/.arcrc",
+      "user" => "root"
+    );
+
+    $cleanup = array(
+      "name" => "Arc cleanup",
+      "shell" => "rm -f ~/.arcrc",
+      "user" => "root"
+    );
+
+    $steps[] = $setup;
+    $steps[] = $fix_permission;
+    $steps[] = $fix_git_ignore;
+    $steps[] = $patch;
+    $steps[] = $cleanup;
+
+    $tests = array(
+      "unit", "clang_unit", "tsan", "asan", "valgrind"
+    );
+
+    foreach ($tests as $test) {
+      $run_test = array(
+        "name" => "Run " . $test,
+        "shell" => "EMAIL=" . $username . "@fb.com "
+                    . "./build_tools/rocksdb-lego-determinator " . $test,
+        "user" => "root",
+        "determinator" => true
+      );
+
+      $steps[] = $run_test;
+    }
+
+    return $steps;
+  }
+
+  function startTestsInSandcastle($workflow) {
+    $diffID = $workflow->getDiffId();
+    $username = exec("whoami");
+
+    if ($diffID == null || $username == null) {
+      return;
+    }
+
+    $arg = array(
+      "name" => "RocksDB diff D" . $diffID . "testing for " . $username,
+      "steps" => $this->getSteps($diffID, $username)
+    );
+
+    $url = 'https://interngraph.intern.facebook.com/sandcastle/generate?'
+            .'command=SandcastleUniversalCommand'
+            .'&vcs=rocksdb-git&revision=origin%2Fmaster&type=lego'
+            .'&user=krad&alias=ci-util'
+            .'&command-args=' . urlencode(json_encode($arg));
+
+    $cmd = 'https_proxy= HTTPS_PROXY= curl -s -k -F app=659387027470559 '
+            . '-F token=AeO_3f2Ya3TujjnxGD4 "' . $url . '"';
+
+    echo "\n====================================================== \n";
+    echo "Scheduling sandcastle job for D" . $diffID . " for " . $username;
+    echo "\n";
+    echo "Please follow the URL for details on the job. \n";
+    echo "An email will be sent to " . $username . "@fb.com on failure. \n";
+    echo "\n";
+    echo "Job details: \n";
+
+    $output = shell_exec($cmd);
+
+    echo $output;
+
+    echo "\n====================================================== \n";
+  }
+
   //////////////////////////////////////////////////////////////////////
   /* Send off builds to jenkins */
-  function maybePushToJenkins($workflow) {
+  function startTestsInJenkins($workflow) {
     $diffID = $workflow->getDiffID();
     if ($diffID === null) {
       return;