diff --git a/tests/foo/1.0/default/Android.bp b/tests/foo/1.0/default/Android.bp
index 76a4656..952f25d 100644
--- a/tests/foo/1.0/default/Android.bp
+++ b/tests/foo/1.0/default/Android.bp
@@ -5,7 +5,6 @@
     relative_install_path: "hw",
     srcs: [
         "Foo.cpp",
-        "FooCallback.cpp",
     ],
 
     shared_libs: [
diff --git a/tests/foo/1.0/default/Foo.cpp b/tests/foo/1.0/default/Foo.cpp
index cdfdecc..a860ce7 100644
--- a/tests/foo/1.0/default/Foo.cpp
+++ b/tests/foo/1.0/default/Foo.cpp
@@ -2,7 +2,6 @@
 #define LOG_TAG "hidl_test"
 
 #include "Foo.h"
-#include "FooCallback.h"
 #include <android-base/logging.h>
 #include <hidl-test/FooHelper.h>
 #include <inttypes.h>
diff --git a/tests/foo/1.0/default/FooCallback.cpp b/tests/foo/1.0/default/FooCallback.cpp
deleted file mode 100644
index ff3a545..0000000
--- a/tests/foo/1.0/default/FooCallback.cpp
+++ /dev/null
@@ -1,134 +0,0 @@
-
-#define LOG_TAG "hidl_test"
-
-#include "FooCallback.h"
-#include <android/log.h>
-#include <hidl-test/FooHelper.h>
-#include <inttypes.h>
-#include <utils/Timers.h>
-
-namespace android {
-namespace hardware {
-namespace tests {
-namespace foo {
-namespace V1_0 {
-namespace implementation {
-
-enum {
-    NOT_REPORTED = -1LL
-};
-
-FooCallback::FooCallback()
-        : mLock{}, mCond{} {
-    for (size_t i = 0; i < invokeInfo.size(); i++) {
-        invokeInfo[i].invoked = false;
-        invokeInfo[i].timeNs = NOT_REPORTED;
-        invokeInfo[i].callerBlockedNs = NOT_REPORTED;
-    }
-}
-
-Return<void> FooCallback::heyItsYou(
-        const sp<IFooCallback> &_cb) {
-    nsecs_t start = systemTime();
-    ALOGI("SERVER(FooCallback) 1: heyItsYou cb = %p", _cb.get());
-    nsecs_t end = systemTime();
-    {
-        Mutex::Autolock lock(mLock);
-        invokeInfo[0].invoked = true;
-        invokeInfo[0].timeNs = end - start;
-        mCond.signal();
-    }
-    ALOGI("SERVER(FooCallback) 2: heyItsYou returned");
-    return Void();
-}
-
-Return<bool> FooCallback::heyItsYouIsntIt(const sp<IFooCallback> &_cb) {
-    nsecs_t start = systemTime();
-    ALOGI("SERVER(FooCallback) 3: heyItsYouIsntIt cb = %p sleeping for %" PRId64 " seconds", _cb.get(), DELAY_S);
-    sleep(DELAY_S);
-    ALOGI("SERVER(FooCallback) 4: heyItsYouIsntIt cb = %p responding", _cb.get());
-    nsecs_t end = systemTime();
-    {
-        Mutex::Autolock lock(mLock);
-        invokeInfo[1].invoked = true;
-        invokeInfo[1].timeNs = end - start;
-        mCond.signal();
-    }
-    ALOGI("SERVER(FooCallback) 5: heyItsYouIsntIt cb = %p responding", _cb.get());
-    return true;
-}
-
-Return<void> FooCallback::heyItsTheMeaningOfLife(uint8_t tmol) {
-    nsecs_t start = systemTime();
-    ALOGI("SERVER(FooCallback) 6.1: heyItsTheMeaningOfLife = %d sleeping for %" PRId64 " seconds", tmol, DELAY_S);
-    sleep(DELAY_S);
-    ALOGI("SERVER(FooCallback) 6.2: heyItsTheMeaningOfLife = %d done sleeping", tmol);
-    nsecs_t end = systemTime();
-    {
-        Mutex::Autolock lock(mLock);
-        invokeInfo[2].invoked = true;
-        invokeInfo[2].timeNs = end - start;
-        mCond.signal();
-    }
-    ALOGI("SERVER(FooCallback) 6.3: heyItsTheMeaningOfLife returned");
-    return Void();
-}
-
-Return<void> FooCallback::reportResults(int64_t ns, reportResults_cb cb) {
-    ALOGI("SERVER(FooCallback) 8.1: reportResults(%" PRId64 " seconds)", nanoseconds_to_seconds(ns));
-    nsecs_t leftToWaitNs = ns;
-    bool cond;
-    {
-        Mutex::Autolock lock(mLock);
-        while ((cond = ((!invokeInfo[0].invoked ||
-                !invokeInfo[1].invoked ||
-                !invokeInfo[2].invoked ||
-                invokeInfo[0].callerBlockedNs == NOT_REPORTED ||
-                invokeInfo[1].callerBlockedNs == NOT_REPORTED ||
-                invokeInfo[2].callerBlockedNs == NOT_REPORTED)   &&
-               leftToWaitNs > 0))) {
-            nsecs_t start = systemTime();
-            ::android::status_t rc = mCond.waitRelative(mLock, leftToWaitNs);
-            if (rc != ::android::OK) {
-                ALOGW("SERVER(FooCallback)::reportResults(%" PRId64 " ns) Condition::waitRelative(%" PRId64 ") returned error (%d)", ns, leftToWaitNs, rc);
-                if (rc == -ETIMEDOUT) {
-                    // time's up
-                    leftToWaitNs = -1;
-                }
-                break;
-            }
-            ALOGI("SERVER(FooCallback)::reportResults(%" PRId64 " ns) Condition::waitRelative was signalled", ns);
-            leftToWaitNs -= systemTime() - start;
-        }
-    }
-    ALOGI("SERVER(FooCallback) 8.2: reportResults returned;"
-            "invoked? %d, %d, %d; leftToWaitNs = %" PRId64 "; cond = %d",
-            invokeInfo[0].invoked, invokeInfo[1].invoked, invokeInfo[2].invoked,
-            leftToWaitNs, cond);
-    cb(leftToWaitNs, invokeInfo);
-    return Void();
-}
-
-Return<void> FooCallback::youBlockedMeFor(const hidl_array<int64_t, 3> &ns) {
-    ALOGI("SERVER(FooCallback) 7.1: youBlockedMeFor");
-    {
-        Mutex::Autolock lock(mLock);
-        for (size_t i = 0; i < 3; i++) {
-            invokeInfo[i].callerBlockedNs = ns[i];
-        }
-        mCond.signal();
-    }
-    ALOGI("SERVER(FooCallback) 7.2: returned");
-    return Void();
-}
-
-IFooCallback* HIDL_FETCH_IFooCallback(const char* /* name */) {
-    return new FooCallback();
-}
-
-} // namespace implementation
-}  // namespace V1_0
-}  // namespace foo
-}  // namespace tests
-}  // namespace hardware
-}  // namespace android
diff --git a/tests/foo/1.0/default/FooCallback.h b/tests/foo/1.0/default/FooCallback.h
deleted file mode 100644
index 3164a9d..0000000
--- a/tests/foo/1.0/default/FooCallback.h
+++ /dev/null
@@ -1,46 +0,0 @@
-#ifndef ANDROID_HARDWARE_TESTS_FOO_V1_0_FOOCALLBACK_H
-#define ANDROID_HARDWARE_TESTS_FOO_V1_0_FOOCALLBACK_H
-
-#include <android/hardware/tests/foo/1.0/IFooCallback.h>
-#include <hidl/Status.h>
-#include <hidl/MQDescriptor.h>
-
-#include <utils/Condition.h>
-namespace android {
-namespace hardware {
-namespace tests {
-namespace foo {
-namespace V1_0 {
-namespace implementation {
-
-using ::android::hardware::tests::foo::V1_0::IFooCallback;
-using ::android::hardware::Return;
-using ::android::hardware::Void;
-using ::android::hardware::hidl_vec;
-using ::android::hardware::hidl_string;
-using ::android::sp;
-
-struct FooCallback : public IFooCallback {
-    FooCallback();
-    // Methods from ::android::hardware::tests::foo::V1_0::IFooCallback follow.
-    Return<void> heyItsYou(const sp<IFooCallback>& cb)  override;
-    Return<bool> heyItsYouIsntIt(const sp<IFooCallback>& cb)  override;
-    Return<void> heyItsTheMeaningOfLife(uint8_t tmol)  override;
-    Return<void> reportResults(int64_t ns, reportResults_cb _hidl_cb)  override;
-    Return<void> youBlockedMeFor(const hidl_array<int64_t, 3 /* 3 */>& callerBlockedInfo)  override;
-
-    hidl_array<InvokeInfo, 3> invokeInfo;
-    Mutex mLock;
-    Condition mCond;
-};
-
-extern "C" IFooCallback* HIDL_FETCH_IFooCallback(const char* name);
-
-}  // namespace implementation
-}  // namespace V1_0
-}  // namespace foo
-}  // namespace tests
-}  // namespace hardware
-}  // namespace android
-
-#endif  // ANDROID_HARDWARE_TESTS_FOO_V1_0_FOOCALLBACK_H