diff --git a/libs/binder/tests/Android.bp b/libs/binder/tests/Android.bp
index ba8fb39..e4d4de8 100644
--- a/libs/binder/tests/Android.bp
+++ b/libs/binder/tests/Android.bp
@@ -134,6 +134,10 @@
         "IBinderRpcTest.aidl",
         "ParcelableCertificateData.aidl",
     ],
+    flags: [
+        "-Werror",
+        "-Wno-mixed-oneway",
+    ],
     backend: {
         java: {
             enabled: false,
diff --git a/libs/binder/tests/parcel_fuzzer/Android.bp b/libs/binder/tests/parcel_fuzzer/Android.bp
index fe79f8e..83db6c9 100644
--- a/libs/binder/tests/parcel_fuzzer/Android.bp
+++ b/libs/binder/tests/parcel_fuzzer/Android.bp
@@ -16,6 +16,9 @@
         "parcelables/SingleDataParcelable.aidl",
         "parcelables/GenericDataParcelable.aidl",
     ],
+    flags: [
+        "-Werror",
+    ],
     backend: {
         java: {
             enabled: true,
diff --git a/libs/binder/tests/parcel_fuzzer/parcelables/GenericDataParcelable.aidl b/libs/binder/tests/parcel_fuzzer/parcelables/GenericDataParcelable.aidl
index dd08f72..9884dbb 100644
--- a/libs/binder/tests/parcel_fuzzer/parcelables/GenericDataParcelable.aidl
+++ b/libs/binder/tests/parcel_fuzzer/parcelables/GenericDataParcelable.aidl
@@ -17,7 +17,7 @@
 
 parcelable GenericDataParcelable {
     enum JustSomeEnum {
-        SOME_ENUMERATOR,
+        ONE_ENUMERATOR,
         ANOTHER_ENUMERATOR,
         MAYBE_ONE_MORE_ENUMERATOR,
     }