diff --git a/security/keymint/aidl/vts/functional/AttestKeyTest.cpp b/security/keymint/aidl/vts/functional/AttestKeyTest.cpp
index 0499079032..732c896af3 100644
--- a/security/keymint/aidl/vts/functional/AttestKeyTest.cpp
+++ b/security/keymint/aidl/vts/functional/AttestKeyTest.cpp
@@ -133,7 +133,7 @@ TEST_P(AttestKeyTest, AllRsaSizes) {
         vector<uint8_t> attested_key_blob;
         vector<KeyCharacteristics> attested_key_characteristics;
         vector<Certificate> attested_key_cert_chain;
-        EXPECT_EQ(ErrorCode::OK,
+        ASSERT_EQ(ErrorCode::OK,
                   GenerateKey(AuthorizationSetBuilder()
                                       .RsaSigningKey(2048, 65537)
                                       .Authorization(TAG_NO_AUTH_REQUIRED)
@@ -144,9 +144,11 @@ TEST_P(AttestKeyTest, AllRsaSizes) {
                               &attested_key_cert_chain));
         KeyBlobDeleter attested_deleter(keymint_, attested_key_blob);
 
+        ASSERT_GT(attested_key_cert_chain.size(), 0);
+
         AuthorizationSet hw_enforced = HwEnforcedAuthorizations(attested_key_characteristics);
         AuthorizationSet sw_enforced = SwEnforcedAuthorizations(attested_key_characteristics);
-        EXPECT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
+        ASSERT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
                                               SecLevel(),
                                               attested_key_cert_chain[0].encodedCertificate));
 
@@ -163,7 +165,7 @@ TEST_P(AttestKeyTest, AllRsaSizes) {
          */
         attested_key_characteristics.resize(0);
         attested_key_cert_chain.resize(0);
-        EXPECT_EQ(ErrorCode::OK,
+        ASSERT_EQ(ErrorCode::OK,
                   GenerateKey(AuthorizationSetBuilder()
                                       .RsaEncryptionKey(2048, 65537)
                                       .Digest(Digest::NONE)
@@ -176,9 +178,11 @@ TEST_P(AttestKeyTest, AllRsaSizes) {
                               &attested_key_cert_chain));
         KeyBlobDeleter attested_deleter2(keymint_, attested_key_blob);
 
+        ASSERT_GT(attested_key_cert_chain.size(), 0);
+
         hw_enforced = HwEnforcedAuthorizations(attested_key_characteristics);
         sw_enforced = SwEnforcedAuthorizations(attested_key_characteristics);
-        EXPECT_TRUE(verify_attestation_record(AidlVersion(), "foo2", "bar2", sw_enforced,
+        ASSERT_TRUE(verify_attestation_record(AidlVersion(), "foo2", "bar2", sw_enforced,
                                               hw_enforced, SecLevel(),
                                               attested_key_cert_chain[0].encodedCertificate));
 
@@ -196,7 +200,7 @@ TEST_P(AttestKeyTest, AllRsaSizes) {
         attested_key_characteristics.resize(0);
         attested_key_cert_chain.resize(0);
         uint64_t timestamp = 1619621648000;
-        EXPECT_EQ(ErrorCode::OK,
+        ASSERT_EQ(ErrorCode::OK,
                   GenerateKey(AuthorizationSetBuilder()
                                       .EcdsaSigningKey(EcCurve::P_256)
                                       .Authorization(TAG_NO_AUTH_REQUIRED)
@@ -208,6 +212,8 @@ TEST_P(AttestKeyTest, AllRsaSizes) {
                               &attested_key_cert_chain));
         KeyBlobDeleter attested_deleter3(keymint_, attested_key_blob);
 
+        ASSERT_GT(attested_key_cert_chain.size(), 0);
+
         // The returned key characteristics will include CREATION_DATETIME (checked below)
         // in SecurityLevel::KEYSTORE; this will be stripped out in the CheckCharacteristics()
         // call below, to match what getKeyCharacteristics() returns (which doesn't include
@@ -223,7 +229,7 @@ TEST_P(AttestKeyTest, AllRsaSizes) {
         EXPECT_TRUE(sw_enforced.Contains(TAG_CREATION_DATETIME, timestamp))
                 << "expected CREATION_TIMESTAMP in sw_enforced:" << sw_enforced
                 << " not in hw_enforced:" << hw_enforced;
-        EXPECT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
+        ASSERT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
                                               SecLevel(),
                                               attested_key_cert_chain[0].encodedCertificate));
 
@@ -313,7 +319,7 @@ TEST_P(AttestKeyTest, RsaAttestedAttestKeys) {
 
     AuthorizationSet hw_enforced = HwEnforcedAuthorizations(attest_key_characteristics);
     AuthorizationSet sw_enforced = SwEnforcedAuthorizations(attest_key_characteristics);
-    EXPECT_TRUE(verify_attestation_record(AidlVersion(), challenge, app_id,  //
+    ASSERT_TRUE(verify_attestation_record(AidlVersion(), challenge, app_id,  //
                                           sw_enforced, hw_enforced, SecLevel(),
                                           attest_key_cert_chain[0].encodedCertificate));
 
@@ -331,7 +337,7 @@ TEST_P(AttestKeyTest, RsaAttestedAttestKeys) {
     uint64_t serial_int2 = 255;
     vector<uint8_t> serial_blob2(build_serial_blob(serial_int2));
 
-    EXPECT_EQ(ErrorCode::OK,
+    ASSERT_EQ(ErrorCode::OK,
               GenerateKey(AuthorizationSetBuilder()
                                   .RsaSigningKey(2048, 65537)
                                   .Authorization(TAG_NO_AUTH_REQUIRED)
@@ -344,9 +350,11 @@ TEST_P(AttestKeyTest, RsaAttestedAttestKeys) {
                           &attested_key_cert_chain));
     KeyBlobDeleter attested_deleter(keymint_, attested_key_blob);
 
+    ASSERT_GT(attested_key_cert_chain.size(), 0);
+
     AuthorizationSet hw_enforced2 = HwEnforcedAuthorizations(attested_key_characteristics);
     AuthorizationSet sw_enforced2 = SwEnforcedAuthorizations(attested_key_characteristics);
-    EXPECT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced2, hw_enforced2,
+    ASSERT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced2, hw_enforced2,
                                           SecLevel(),
                                           attested_key_cert_chain[0].encodedCertificate));
 
@@ -414,7 +422,7 @@ TEST_P(AttestKeyTest, RsaAttestKeyChaining) {
         AuthorizationSet hw_enforced = HwEnforcedAuthorizations(attested_key_characteristics);
         AuthorizationSet sw_enforced = SwEnforcedAuthorizations(attested_key_characteristics);
         ASSERT_GT(cert_chain_list[i].size(), 0);
-        EXPECT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
+        ASSERT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
                                               SecLevel(),
                                               cert_chain_list[i][0].encodedCertificate));
 
@@ -489,7 +497,7 @@ TEST_P(AttestKeyTest, EcAttestKeyChaining) {
         AuthorizationSet hw_enforced = HwEnforcedAuthorizations(attested_key_characteristics);
         AuthorizationSet sw_enforced = SwEnforcedAuthorizations(attested_key_characteristics);
         ASSERT_GT(cert_chain_list[i].size(), 0);
-        EXPECT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
+        ASSERT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
                                               SecLevel(),
                                               cert_chain_list[i][0].encodedCertificate));
 
@@ -605,7 +613,7 @@ TEST_P(AttestKeyTest, AlternateAttestKeyChaining) {
         AuthorizationSet hw_enforced = HwEnforcedAuthorizations(attested_key_characteristics);
         AuthorizationSet sw_enforced = SwEnforcedAuthorizations(attested_key_characteristics);
         ASSERT_GT(cert_chain_list[i].size(), 0);
-        EXPECT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
+        ASSERT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
                                               SecLevel(),
                                               cert_chain_list[i][0].encodedCertificate));
 
@@ -655,7 +663,7 @@ TEST_P(AttestKeyTest, MissingChallenge) {
         vector<uint8_t> attested_key_blob;
         vector<KeyCharacteristics> attested_key_characteristics;
         vector<Certificate> attested_key_cert_chain;
-        EXPECT_EQ(ErrorCode::ATTESTATION_CHALLENGE_MISSING,
+        ASSERT_EQ(ErrorCode::ATTESTATION_CHALLENGE_MISSING,
                   GenerateKey(AuthorizationSetBuilder()
                                       .RsaSigningKey(2048, 65537)
                                       .Authorization(TAG_NO_AUTH_REQUIRED)
@@ -664,7 +672,7 @@ TEST_P(AttestKeyTest, MissingChallenge) {
                               attest_key, &attested_key_blob, &attested_key_characteristics,
                               &attested_key_cert_chain));
 
-        EXPECT_EQ(ErrorCode::ATTESTATION_CHALLENGE_MISSING,
+        ASSERT_EQ(ErrorCode::ATTESTATION_CHALLENGE_MISSING,
                   GenerateKey(AuthorizationSetBuilder()
                                       .EcdsaSigningKey(EcCurve::P_256)
                                       .Authorization(TAG_NO_AUTH_REQUIRED)
@@ -702,7 +710,7 @@ TEST_P(AttestKeyTest, AllEcCurves) {
         vector<uint8_t> attested_key_blob;
         vector<KeyCharacteristics> attested_key_characteristics;
         vector<Certificate> attested_key_cert_chain;
-        EXPECT_EQ(ErrorCode::OK,
+        ASSERT_EQ(ErrorCode::OK,
                   GenerateKey(AuthorizationSetBuilder()
                                       .RsaSigningKey(2048, 65537)
                                       .Authorization(TAG_NO_AUTH_REQUIRED)
@@ -717,7 +725,7 @@ TEST_P(AttestKeyTest, AllEcCurves) {
 
         AuthorizationSet hw_enforced = HwEnforcedAuthorizations(attested_key_characteristics);
         AuthorizationSet sw_enforced = SwEnforcedAuthorizations(attested_key_characteristics);
-        EXPECT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
+        ASSERT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
                                               SecLevel(),
                                               attested_key_cert_chain[0].encodedCertificate));
 
@@ -733,7 +741,7 @@ TEST_P(AttestKeyTest, AllEcCurves) {
         /*
          * Use attestation key to sign EC key
          */
-        EXPECT_EQ(ErrorCode::OK,
+        ASSERT_EQ(ErrorCode::OK,
                   GenerateKey(AuthorizationSetBuilder()
                                       .EcdsaSigningKey(EcCurve::P_256)
                                       .Authorization(TAG_NO_AUTH_REQUIRED)
@@ -748,7 +756,7 @@ TEST_P(AttestKeyTest, AllEcCurves) {
 
         hw_enforced = HwEnforcedAuthorizations(attested_key_characteristics);
         sw_enforced = SwEnforcedAuthorizations(attested_key_characteristics);
-        EXPECT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
+        ASSERT_TRUE(verify_attestation_record(AidlVersion(), "foo", "bar", sw_enforced, hw_enforced,
                                               SecLevel(),
                                               attested_key_cert_chain[0].encodedCertificate));
 
@@ -786,7 +794,7 @@ TEST_P(AttestKeyTest, AttestWithNonAttestKey) {
     vector<uint8_t> attested_key_blob;
     vector<KeyCharacteristics> attested_key_characteristics;
     vector<Certificate> attested_key_cert_chain;
-    EXPECT_EQ(ErrorCode::INCOMPATIBLE_PURPOSE,
+    ASSERT_EQ(ErrorCode::INCOMPATIBLE_PURPOSE,
               GenerateKey(AuthorizationSetBuilder()
                                   .EcdsaSigningKey(EcCurve::P_256)
                                   .Authorization(TAG_NO_AUTH_REQUIRED)
@@ -881,6 +889,7 @@ TEST_P(AttestKeyTest, EcdsaAttestationID) {
         }
 
         ASSERT_EQ(result, ErrorCode::OK);
+        ASSERT_GT(attested_key_cert_chain.size(), 0);
         KeyBlobDeleter attested_deleter(keymint_, attested_key_blob);
 
         AuthorizationSet hw_enforced = HwEnforcedAuthorizations(attested_key_characteristics);
@@ -891,7 +900,7 @@ TEST_P(AttestKeyTest, EcdsaAttestationID) {
         // attestation extension should contain them, so make sure the extra tag is added.
         hw_enforced.push_back(tag);
 
-        EXPECT_TRUE(verify_attestation_record(AidlVersion(), "challenge", "foo", sw_enforced,
+        ASSERT_TRUE(verify_attestation_record(AidlVersion(), "challenge", "foo", sw_enforced,
                                               hw_enforced, SecLevel(),
                                               attested_key_cert_chain[0].encodedCertificate));
     }
@@ -1011,6 +1020,7 @@ TEST_P(AttestKeyTest, SecondIMEIAttestationIDSuccess) {
     }
 
     ASSERT_EQ(result, ErrorCode::OK);
+    ASSERT_GT(attested_key_cert_chain.size(), 0);
     KeyBlobDeleter attested_deleter(keymint_, attested_key_blob);
 
     AuthorizationSet hw_enforced = HwEnforcedAuthorizations(attested_key_characteristics);
@@ -1023,7 +1033,7 @@ TEST_P(AttestKeyTest, SecondIMEIAttestationIDSuccess) {
     KeyParameter imei_tag = Authorization(TAG_ATTESTATION_ID_SECOND_IMEI, imei_blob);
     hw_enforced.push_back(imei_tag);
 
-    EXPECT_TRUE(verify_attestation_record(AidlVersion(), "challenge", "foo", sw_enforced,
+    ASSERT_TRUE(verify_attestation_record(AidlVersion(), "challenge", "foo", sw_enforced,
                                           hw_enforced, SecLevel(),
                                           attested_key_cert_chain[0].encodedCertificate));
 }
@@ -1088,6 +1098,7 @@ TEST_P(AttestKeyTest, MultipleIMEIAttestationIDSuccess) {
     }
 
     ASSERT_EQ(result, ErrorCode::OK);
+    ASSERT_GT(attested_key_cert_chain.size(), 0);
     KeyBlobDeleter attested_deleter(keymint_, attested_key_blob);
 
     AuthorizationSet hw_enforced = HwEnforcedAuthorizations(attested_key_characteristics);
@@ -1103,7 +1114,7 @@ TEST_P(AttestKeyTest, MultipleIMEIAttestationIDSuccess) {
     KeyParameter sec_imei_tag = Authorization(TAG_ATTESTATION_ID_SECOND_IMEI, sec_imei_blob);
     hw_enforced.push_back(sec_imei_tag);
 
-    EXPECT_TRUE(verify_attestation_record(AidlVersion(), "challenge", "foo", sw_enforced,
+    ASSERT_TRUE(verify_attestation_record(AidlVersion(), "challenge", "foo", sw_enforced,
                                           hw_enforced, SecLevel(),
                                           attested_key_cert_chain[0].encodedCertificate));
 }