diff --git a/tests/benchmark/AndroidTest.xml b/tests/benchmark/AndroidTest.xml
index e908077..4949d22 100644
--- a/tests/benchmark/AndroidTest.xml
+++ b/tests/benchmark/AndroidTest.xml
@@ -21,6 +21,10 @@
     <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
         <option name="test-file-name" value="MicrodroidBenchmarkApp.apk" />
     </target_preparer>
+    <!-- Need root to access /proc/$pid/smaps when measuring memory usage. -->
+    <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer">
+        <option name="force-root" value="true" />
+    </target_preparer>
     <target_preparer class="com.android.tradefed.targetprep.RunCommandTargetPreparer">
       <option
         name="run-command"