diff --git a/keymaster/4.0/vts/functional/keymaster_hidl_hal_test.cpp b/keymaster/4.0/vts/functional/keymaster_hidl_hal_test.cpp
index 0ac7e48..c5acf8c 100644
--- a/keymaster/4.0/vts/functional/keymaster_hidl_hal_test.cpp
+++ b/keymaster/4.0/vts/functional/keymaster_hidl_hal_test.cpp
@@ -4413,6 +4413,35 @@
 }
 
 /*
+ * AttestationTest.AttestationApplicationIDLengthProperlyEncoded
+ *
+ * Verifies that the Attestation Application ID software enforced tag has a proper length encoding.
+ * Some implementations break strict encoding rules by encoding a length between 127 and 256 in one
+ * byte. Proper DER encoding specifies that for lengths greather than 127, one byte should be used
+ * to specify how many following bytes will be used to encode the length.
+ */
+TEST_F(AttestationTest, AttestationApplicationIDLengthProperlyEncoded) {
+    auto creation_time = std::chrono::system_clock::now();
+    ASSERT_EQ(ErrorCode::OK, GenerateKey(AuthorizationSetBuilder()
+                                                 .Authorization(TAG_NO_AUTH_REQUIRED)
+                                                 .EcdsaSigningKey(EcCurve::P_256)
+                                                 .Digest(Digest::SHA_2_256)));
+
+    hidl_vec<hidl_vec<uint8_t>> cert_chain;
+    const string app_id(143, 'a');
+    ASSERT_EQ(ErrorCode::OK,
+              AttestKey(AuthorizationSetBuilder()
+                                .Authorization(TAG_ATTESTATION_CHALLENGE, HidlBuf("challenge"))
+                                .Authorization(TAG_ATTESTATION_APPLICATION_ID, HidlBuf(app_id)),
+                        &cert_chain));
+    EXPECT_GE(cert_chain.size(), 2U);
+
+    EXPECT_TRUE(verify_attestation_record("challenge", app_id,                    //
+                                          key_characteristics_.softwareEnforced,  //
+                                          key_characteristics_.hardwareEnforced,  //
+                                          SecLevel(), cert_chain[0], creation_time));
+}
+/*
  * AttestationTest.AesAttestation
  *
  * Verifies that attesting to AES keys fails in the expected way.
diff --git a/memtrack/1.0/vts/functional/Android.bp b/memtrack/1.0/vts/functional/Android.bp
index d682e0b..9e5cf6d 100644
--- a/memtrack/1.0/vts/functional/Android.bp
+++ b/memtrack/1.0/vts/functional/Android.bp
@@ -19,5 +19,5 @@
     defaults: ["VtsHalTargetTestDefaults"],
     srcs: ["VtsHalMemtrackV1_0TargetTest.cpp"],
     static_libs: ["android.hardware.memtrack@1.0"],
-    test_suites: ["general-tests"],
+    test_suites: ["general-tests", "vts-core"],
 }
diff --git a/memtrack/1.0/vts/functional/VtsHalMemtrackV1_0TargetTest.cpp b/memtrack/1.0/vts/functional/VtsHalMemtrackV1_0TargetTest.cpp
index 691ecca..cccedca 100644
--- a/memtrack/1.0/vts/functional/VtsHalMemtrackV1_0TargetTest.cpp
+++ b/memtrack/1.0/vts/functional/VtsHalMemtrackV1_0TargetTest.cpp
@@ -20,8 +20,9 @@
 
 #include <android/hardware/memtrack/1.0/IMemtrack.h>
 
-#include <VtsHalHidlTargetTestBase.h>
-#include <VtsHalHidlTargetTestEnvBase.h>
+#include <gtest/gtest.h>
+#include <hidl/GtestPrinter.h>
+#include <hidl/ServiceManagement.h>
 
 #include <fcntl.h>
 #include <algorithm>
@@ -39,23 +40,10 @@
 using std::vector;
 using std::count_if;
 
-// Test environment for Memtrack HIDL HAL.
-class MemtrackHidlEnvironment : public ::testing::VtsHalHidlTargetTestEnvBase {
-   public:
-    // get the test environment singleton
-    static MemtrackHidlEnvironment* Instance() {
-        static MemtrackHidlEnvironment* instance = new MemtrackHidlEnvironment;
-        return instance;
-    }
-
-    virtual void registerTestServices() override { registerTestService<IMemtrack>(); }
-};
-
-class MemtrackHidlTest : public ::testing::VtsHalHidlTargetTestBase {
+class MemtrackHidlTest : public ::testing::TestWithParam<std::string> {
  public:
   virtual void SetUp() override {
-      memtrack = ::testing::VtsHalHidlTargetTestBase::getService<IMemtrack>(
-          MemtrackHidlEnvironment::Instance()->getServiceName<IMemtrack>());
+      memtrack = IMemtrack::getService(GetParam());
       ASSERT_NE(memtrack, nullptr);
   }
 
@@ -93,7 +81,7 @@
 
 /* Sanity check results when getMemory() is passed a negative PID
  */
-TEST_F(MemtrackHidlTest, BadPidTest) {
+TEST_P(MemtrackHidlTest, BadPidTest) {
   MemtrackStatus s;
   hidl_vec<MemtrackRecord> v;
   auto cb = generate_cb(&s, &v);
@@ -108,7 +96,7 @@
 
 /* Sanity check results when getMemory() is passed a bad memory usage type
  */
-TEST_F(MemtrackHidlTest, BadTypeTest) {
+TEST_P(MemtrackHidlTest, BadTypeTest) {
   MemtrackStatus s;
   hidl_vec<MemtrackRecord> v;
   auto cb = generate_cb(&s, &v);
@@ -121,7 +109,7 @@
  * for all memory types, including valid flag combinations for every
  * MemtrackRecord returned.
  */
-TEST_F(MemtrackHidlTest, GetMemoryTest) {
+TEST_P(MemtrackHidlTest, GetMemoryTest) {
   /* Opening this device causes the kernel to provide memtrack with memory
    * info for this process.
    */
@@ -172,11 +160,7 @@
                   static_cast<uint32_t>(MemtrackType::NUM_TYPES));
 }
 
-int main(int argc, char **argv) {
-    ::testing::AddGlobalTestEnvironment(MemtrackHidlEnvironment::Instance());
-    ::testing::InitGoogleTest(&argc, argv);
-    MemtrackHidlEnvironment::Instance()->init(&argc, argv);
-    int status = RUN_ALL_TESTS();
-    LOG(INFO) << "Test result = " << status;
-    return status;
-}
+INSTANTIATE_TEST_SUITE_P(
+        PerInstance, MemtrackHidlTest,
+        testing::ValuesIn(android::hardware::getAllHalInstanceNames(IMemtrack::descriptor)),
+        android::hardware::PrintInstanceNameToString);