diff --git a/cas/1.2/vts/functional/Android.bp b/cas/1.2/vts/functional/Android.bp
index 9bc372c..2d6517f 100644
--- a/cas/1.2/vts/functional/Android.bp
+++ b/cas/1.2/vts/functional/Android.bp
@@ -31,6 +31,8 @@
     shared_libs: [
         "libbinder",
     ],
-    test_suites: ["general-tests"],
+    test_suites: [
+        "general-tests",
+        "vts-core",
+    ],
 }
-
diff --git a/cas/1.2/vts/functional/VtsHalCasV1_2TargetTest.cpp b/cas/1.2/vts/functional/VtsHalCasV1_2TargetTest.cpp
index 8439ceb..58e0f2e 100644
--- a/cas/1.2/vts/functional/VtsHalCasV1_2TargetTest.cpp
+++ b/cas/1.2/vts/functional/VtsHalCasV1_2TargetTest.cpp
@@ -16,8 +16,6 @@
 
 #define LOG_TAG "mediacas_hidl_hal_test"
 
-#include <VtsHalHidlTargetTestBase.h>
-#include <VtsHalHidlTargetTestEnvBase.h>
 #include <android-base/logging.h>
 #include <android/hardware/cas/1.0/IDescramblerBase.h>
 #include <android/hardware/cas/1.0/types.h>
@@ -28,8 +26,11 @@
 #include <android/hardware/cas/native/1.0/IDescrambler.h>
 #include <android/hardware/cas/native/1.0/types.h>
 #include <binder/MemoryDealer.h>
+#include <gtest/gtest.h>
+#include <hidl/GtestPrinter.h>
 #include <hidl/HidlSupport.h>
 #include <hidl/HidlTransportSupport.h>
+#include <hidl/ServiceManagement.h>
 #include <hidl/Status.h>
 #include <hidlmemory/FrameworkUtils.h>
 #include <utils/Condition.h>
@@ -293,27 +294,14 @@
     EXPECT_EQ(mEventArg, static_cast<int32_t>(mode));
 }
 
-// Test environment for Cas HIDL HAL.
-class CasHidlEnvironment : public ::testing::VtsHalHidlTargetTestEnvBase {
-  public:
-    // get the test environment singleton
-    static CasHidlEnvironment* Instance() {
-        static CasHidlEnvironment* instance = new CasHidlEnvironment;
-        return instance;
-    }
-
-    virtual void registerTestServices() override { registerTestService<IMediaCasService>(); }
-};
-
-class MediaCasHidlTest : public ::testing::VtsHalHidlTargetTestBase {
+class MediaCasHidlTest : public testing::TestWithParam<std::string> {
   public:
     virtual void SetUp() override {
-        mService = ::testing::VtsHalHidlTargetTestBase::getService<IMediaCasService>(
-                CasHidlEnvironment::Instance()->getServiceName<IMediaCasService>());
+        mService = IMediaCasService::getService(GetParam());
         ASSERT_NE(mService, nullptr);
     }
 
-    sp<IMediaCasService> mService;
+    sp<IMediaCasService> mService = nullptr;
 
   protected:
     static void description(const std::string& description) {
@@ -497,7 +485,7 @@
     return ::testing::AssertionResult(returnVoid.isOk());
 }
 
-TEST_F(MediaCasHidlTest, TestClearKeyApisWithSession) {
+TEST_P(MediaCasHidlTest, TestClearKeyApisWithSession) {
     description("Test that valid call sequences with SessionEvent send and receive");
 
     ASSERT_TRUE(createCasPlugin(CLEAR_KEY_SYSTEM_ID));
@@ -609,11 +597,7 @@
 
 }  // anonymous namespace
 
-int main(int argc, char** argv) {
-    ::testing::AddGlobalTestEnvironment(CasHidlEnvironment::Instance());
-    ::testing::InitGoogleTest(&argc, argv);
-    CasHidlEnvironment::Instance()->init(&argc, argv);
-    int status = RUN_ALL_TESTS();
-    LOG(INFO) << "Test result = " << status;
-    return status;
-}
+INSTANTIATE_TEST_SUITE_P(
+        PerInstance, MediaCasHidlTest,
+        testing::ValuesIn(android::hardware::getAllHalInstanceNames(IMediaCasService::descriptor)),
+        android::hardware::PrintInstanceNameToString);