diff --git a/tests/unit/Android.bp b/tests/unit/Android.bp
index 249ce72..4e2b3be 100644
--- a/tests/unit/Android.bp
+++ b/tests/unit/Android.bp
@@ -36,6 +36,10 @@
         // instrumented Settings app.
     ],
 
+    errorprone: {
+        javacflags: ["-Xep:CheckReturnValue:WARN"]
+    },
+
     // Include all test java files.
     srcs: ["src/**/*.java"],