diff --git a/gnss/aidl/vts/GnssCallbackAidl.cpp b/gnss/aidl/vts/GnssCallbackAidl.cpp
index 77a2506..2f6128b 100644
--- a/gnss/aidl/vts/GnssCallbackAidl.cpp
+++ b/gnss/aidl/vts/GnssCallbackAidl.cpp
@@ -31,7 +31,7 @@
 }
 
 Status GnssCallbackAidl::gnssStatusCb(const GnssStatusValue /* status */) {
-    ALOGI("gnssSvStatusCb");
+    ALOGI("gnssStatusCb");
     return Status::ok();
 }
 
@@ -47,7 +47,8 @@
     return Status::ok();
 }
 
-Status GnssCallbackAidl::gnssNmeaCb(const int64_t /* timestamp */, const std::string& /* nmea */) {
+Status GnssCallbackAidl::gnssNmeaCb(const int64_t timestamp, const std::string& nmea) {
+    nmea_cbq_.store(std::make_pair(timestamp, nmea));
     return Status::ok();
 }
 
diff --git a/gnss/aidl/vts/GnssCallbackAidl.h b/gnss/aidl/vts/GnssCallbackAidl.h
index 209728d..a9495ba 100644
--- a/gnss/aidl/vts/GnssCallbackAidl.h
+++ b/gnss/aidl/vts/GnssCallbackAidl.h
@@ -17,6 +17,7 @@
 #pragma once
 
 #include <android/hardware/gnss/BnGnssCallback.h>
+#include <utility>
 #include "GnssCallbackEventQueue.h"
 
 /* Callback class for data & Event. */
@@ -26,7 +27,8 @@
         : capabilities_cbq_("capabilities"),
           info_cbq_("system_info"),
           location_cbq_("location"),
-          sv_info_list_cbq_("sv_info"){};
+          sv_info_list_cbq_("sv_info"),
+          nmea_cbq_("nmea"){};
     ~GnssCallbackAidl(){};
 
     android::binder::Status gnssSetCapabilitiesCb(const int capabilities) override;
@@ -55,4 +57,6 @@
     android::hardware::gnss::common::GnssCallbackEventQueue<
             std::vector<android::hardware::gnss::IGnssCallback::GnssSvInfo>>
             sv_info_list_cbq_;
+    android::hardware::gnss::common::GnssCallbackEventQueue<std::pair<int64_t, std::string>>
+            nmea_cbq_;
 };
\ No newline at end of file
diff --git a/gnss/aidl/vts/GnssMeasurementCallbackAidl.cpp b/gnss/aidl/vts/GnssMeasurementCallbackAidl.cpp
index c4fad7f..a553954 100644
--- a/gnss/aidl/vts/GnssMeasurementCallbackAidl.cpp
+++ b/gnss/aidl/vts/GnssMeasurementCallbackAidl.cpp
@@ -24,12 +24,10 @@
 
 android::binder::Status GnssMeasurementCallbackAidl::gnssMeasurementCb(const GnssData& gnssData) {
     ALOGI("gnssMeasurementCb");
-    ALOGI("elapsedRealtime: flags = %d, timestampNs: %" PRId64 ", timeUncertaintyNs=%lf",
+    ALOGV("elapsedRealtime: flags = 0x%X, timestampNs: %" PRId64 ", timeUncertaintyNs=%lf",
           gnssData.elapsedRealtime.flags, gnssData.elapsedRealtime.timestampNs,
           gnssData.elapsedRealtime.timeUncertaintyNs);
-    for (const auto& measurement : gnssData.measurements) {
-        ALOGI("measurement.receivedSvTimeInNs=%" PRId64, measurement.receivedSvTimeInNs);
-    }
+
     gnss_data_cbq_.store(gnssData);
     return android::binder::Status::ok();
 }
diff --git a/gnss/aidl/vts/gnss_hal_test.cpp b/gnss/aidl/vts/gnss_hal_test.cpp
index f184f81..407ac0c 100644
--- a/gnss/aidl/vts/gnss_hal_test.cpp
+++ b/gnss/aidl/vts/gnss_hal_test.cpp
@@ -18,15 +18,50 @@
 
 #include "gnss_hal_test.h"
 #include <hidl/ServiceManagement.h>
+#include <algorithm>
+#include <cmath>
 #include "Utils.h"
 
+using android::hardware::gnss::GnssClock;
 using android::hardware::gnss::GnssConstellationType;
+using android::hardware::gnss::GnssData;
 using android::hardware::gnss::GnssLocation;
+using android::hardware::gnss::GnssMeasurement;
 using android::hardware::gnss::IGnss;
 using android::hardware::gnss::IGnssCallback;
+using android::hardware::gnss::IGnssMeasurementInterface;
 using android::hardware::gnss::common::Utils;
 using GnssConstellationTypeV2_0 = android::hardware::gnss::V2_0::GnssConstellationType;
 
+namespace {
+// The difference between the mean of the received intervals and the requested interval should not
+// be larger mInterval * ALLOWED_MEAN_ERROR_RATIO
+constexpr double ALLOWED_MEAN_ERROR_RATIO = 0.25;
+
+// The standard deviation computed for the deltas should not be bigger
+// than mInterval * ALLOWED_STDEV_ERROR_RATIO or MIN_STDEV_MS, whichever is higher.
+constexpr double ALLOWED_STDEV_ERROR_RATIO = 0.50;
+constexpr double MIN_STDEV_MS = 1000;
+
+double computeMean(std::vector<int>& deltas) {
+    long accumulator = 0;
+    for (auto& d : deltas) {
+        accumulator += d;
+    }
+    return accumulator / deltas.size();
+}
+
+double computeStdev(double mean, std::vector<int>& deltas) {
+    double accumulator = 0;
+    for (auto& d : deltas) {
+        double diff = d - mean;
+        accumulator += diff * diff;
+    }
+    return std::sqrt(accumulator / (deltas.size() - 1));
+}
+
+}  // anonymous namespace
+
 void GnssHalTest::SetUp() {
     // Get AIDL handle
     aidl_gnss_hal_ = android::waitForDeclaredService<IGnssAidl>(String16(GetParam().c_str()));
@@ -97,20 +132,26 @@
     ASSERT_TRUE(status.isOk());
 }
 
-bool GnssHalTest::StartAndCheckFirstLocation(const int min_interval_msec,
-                                             const bool low_power_mode) {
+bool GnssHalTest::StartAndCheckFirstLocation(const int min_interval_msec, const bool low_power_mode,
+                                             const bool start_sv_status, const bool start_nmea) {
     if (aidl_gnss_hal_->getInterfaceVersion() <= 1) {
         // Invoke the super method.
         return GnssHalTestTemplate<IGnss_V2_1>::StartAndCheckFirstLocation(min_interval_msec,
                                                                            low_power_mode);
     }
-
     SetPositionMode(min_interval_msec, low_power_mode);
+
     auto status = aidl_gnss_hal_->start();
     EXPECT_TRUE(status.isOk());
 
-    status = aidl_gnss_hal_->startSvStatus();
-    EXPECT_TRUE(status.isOk());
+    if (start_sv_status) {
+        status = aidl_gnss_hal_->startSvStatus();
+        EXPECT_TRUE(status.isOk());
+    }
+    if (start_nmea) {
+        status = aidl_gnss_hal_->startNmea();
+        EXPECT_TRUE(status.isOk());
+    }
 
     /*
      * GnssLocationProvider support of AGPS SUPL & XtraDownloader is not available in VTS,
@@ -131,6 +172,12 @@
     return false;
 }
 
+bool GnssHalTest::StartAndCheckFirstLocation(const int min_interval_msec,
+                                             const bool low_power_mode) {
+    return StartAndCheckFirstLocation(min_interval_msec, low_power_mode,
+                                      /* start_sv_status= */ true, /* start_nmea= */ true);
+}
+
 void GnssHalTest::StopAndClearLocations() {
     ALOGD("StopAndClearLocations");
     if (aidl_gnss_hal_->getInterfaceVersion() <= 1) {
@@ -139,6 +186,8 @@
     }
     auto status = aidl_gnss_hal_->stopSvStatus();
     EXPECT_TRUE(status.isOk());
+    status = aidl_gnss_hal_->stopNmea();
+    EXPECT_TRUE(status.isOk());
 
     status = aidl_gnss_hal_->stop();
     EXPECT_TRUE(status.isOk());
@@ -153,7 +202,8 @@
     aidl_gnss_cb_->location_cbq_.reset();
 }
 
-void GnssHalTest::StartAndCheckLocations(int count) {
+void GnssHalTest::StartAndCheckLocations(const int count, const bool start_sv_status,
+                                         const bool start_nmea) {
     if (aidl_gnss_hal_->getInterfaceVersion() <= 1) {
         // Invoke the super method.
         return GnssHalTestTemplate<IGnss_V2_1>::StartAndCheckLocations(count);
@@ -162,7 +212,8 @@
     const int kLocationTimeoutSubsequentSec = 2;
     const bool kLowPowerMode = false;
 
-    EXPECT_TRUE(StartAndCheckFirstLocation(kMinIntervalMsec, kLowPowerMode));
+    EXPECT_TRUE(StartAndCheckFirstLocation(kMinIntervalMsec, kLowPowerMode, start_sv_status,
+                                           start_nmea));
 
     for (int i = 1; i < count; i++) {
         EXPECT_TRUE(aidl_gnss_cb_->location_cbq_.retrieve(aidl_gnss_cb_->last_location_,
@@ -177,6 +228,10 @@
     }
 }
 
+void GnssHalTest::StartAndCheckLocations(const int count) {
+    StartAndCheckLocations(count, /* start_sv_status= */ true, /* start_nmea= */ true);
+}
+
 std::list<std::vector<IGnssCallback::GnssSvInfo>> GnssHalTest::convertToAidl(
         const std::list<hidl_vec<IGnssCallback_2_1::GnssSvInfo>>& sv_info_list) {
     std::list<std::vector<IGnssCallback::GnssSvInfo>> aidl_sv_info_list;
@@ -313,3 +368,109 @@
 
     return constellation_to_blocklist;
 }
+
+void GnssHalTest::checkGnssMeasurementClockFields(const GnssData& measurement) {
+    Utils::checkElapsedRealtime(measurement.elapsedRealtime);
+    ASSERT_TRUE(measurement.clock.gnssClockFlags >= 0 &&
+                measurement.clock.gnssClockFlags <=
+                        (GnssClock::HAS_LEAP_SECOND | GnssClock::HAS_TIME_UNCERTAINTY |
+                         GnssClock::HAS_FULL_BIAS | GnssClock::HAS_BIAS |
+                         GnssClock::HAS_BIAS_UNCERTAINTY | GnssClock::HAS_DRIFT |
+                         GnssClock::HAS_DRIFT_UNCERTAINTY));
+}
+
+void GnssHalTest::checkGnssMeasurementFlags(const GnssMeasurement& measurement) {
+    ASSERT_TRUE(measurement.flags >= 0 &&
+                measurement.flags <=
+                        (GnssMeasurement::HAS_SNR | GnssMeasurement::HAS_CARRIER_FREQUENCY |
+                         GnssMeasurement::HAS_CARRIER_CYCLES | GnssMeasurement::HAS_CARRIER_PHASE |
+                         GnssMeasurement::HAS_CARRIER_PHASE_UNCERTAINTY |
+                         GnssMeasurement::HAS_AUTOMATIC_GAIN_CONTROL |
+                         GnssMeasurement::HAS_FULL_ISB | GnssMeasurement::HAS_FULL_ISB_UNCERTAINTY |
+                         GnssMeasurement::HAS_SATELLITE_ISB |
+                         GnssMeasurement::HAS_SATELLITE_ISB_UNCERTAINTY |
+                         GnssMeasurement::HAS_SATELLITE_PVT |
+                         GnssMeasurement::HAS_CORRELATION_VECTOR));
+}
+
+void GnssHalTest::checkGnssMeasurementFields(const GnssMeasurement& measurement,
+                                             const GnssData& data) {
+    checkGnssMeasurementFlags(measurement);
+    // Verify CodeType is valid.
+    ASSERT_NE(measurement.signalType.codeType, "");
+    // Verify basebandCn0DbHz is valid.
+    ASSERT_TRUE(measurement.basebandCN0DbHz > 0.0 && measurement.basebandCN0DbHz <= 65.0);
+
+    if (((measurement.flags & GnssMeasurement::HAS_FULL_ISB) > 0) &&
+        ((measurement.flags & GnssMeasurement::HAS_FULL_ISB_UNCERTAINTY) > 0) &&
+        ((measurement.flags & GnssMeasurement::HAS_SATELLITE_ISB) > 0) &&
+        ((measurement.flags & GnssMeasurement::HAS_SATELLITE_ISB_UNCERTAINTY) > 0)) {
+        GnssConstellationType referenceConstellation =
+                data.clock.referenceSignalTypeForIsb.constellation;
+        double carrierFrequencyHz = data.clock.referenceSignalTypeForIsb.carrierFrequencyHz;
+        std::string codeType = data.clock.referenceSignalTypeForIsb.codeType;
+
+        ASSERT_TRUE(referenceConstellation >= GnssConstellationType::UNKNOWN &&
+                    referenceConstellation <= GnssConstellationType::IRNSS);
+        ASSERT_TRUE(carrierFrequencyHz > 0);
+        ASSERT_NE(codeType, "");
+
+        ASSERT_TRUE(std::abs(measurement.fullInterSignalBiasNs) < 1.0e6);
+        ASSERT_TRUE(measurement.fullInterSignalBiasUncertaintyNs >= 0);
+        ASSERT_TRUE(std::abs(measurement.satelliteInterSignalBiasNs) < 1.0e6);
+        ASSERT_TRUE(measurement.satelliteInterSignalBiasUncertaintyNs >= 0);
+    }
+}
+
+void GnssHalTest::startMeasurementWithInterval(
+        int intervalMs, const sp<IGnssMeasurementInterface>& iGnssMeasurement,
+        sp<GnssMeasurementCallbackAidl>& callback) {
+    ALOGD("Start requesting measurement at interval of %d millis.", intervalMs);
+    IGnssMeasurementInterface::Options options;
+    options.intervalMs = intervalMs;
+    auto status = iGnssMeasurement->setCallbackWithOptions(callback, options);
+    ASSERT_TRUE(status.isOk());
+}
+
+void GnssHalTest::collectMeasurementIntervals(const sp<GnssMeasurementCallbackAidl>& callback,
+                                              const int numMeasurementEvents,
+                                              const int timeoutSeconds,
+                                              std::vector<int>& deltasMs) {
+    int64_t lastElapsedRealtimeMillis = 0;
+    for (int i = 0; i < numMeasurementEvents; i++) {
+        GnssData lastGnssData;
+        ASSERT_TRUE(callback->gnss_data_cbq_.retrieve(lastGnssData, timeoutSeconds));
+        EXPECT_EQ(callback->gnss_data_cbq_.calledCount(), i + 1);
+        ASSERT_TRUE(lastGnssData.measurements.size() > 0);
+
+        // Validity check GnssData fields
+        checkGnssMeasurementClockFields(lastGnssData);
+        for (const auto& measurement : lastGnssData.measurements) {
+            checkGnssMeasurementFields(measurement, lastGnssData);
+        }
+
+        long currentElapsedRealtimeMillis = lastGnssData.elapsedRealtime.timestampNs * 1e-6;
+        if (lastElapsedRealtimeMillis != 0) {
+            deltasMs.push_back(currentElapsedRealtimeMillis - lastElapsedRealtimeMillis);
+        }
+        lastElapsedRealtimeMillis = currentElapsedRealtimeMillis;
+    }
+}
+
+void GnssHalTest::assertMeanAndStdev(int intervalMs, std::vector<int>& deltasMs) {
+    double mean = computeMean(deltasMs);
+    double stdev = computeStdev(mean, deltasMs);
+    EXPECT_TRUE(std::abs(mean - intervalMs) <= intervalMs * ALLOWED_MEAN_ERROR_RATIO)
+            << "Test failed, because the mean of intervals is " << mean
+            << " millis. The test requires that abs(" << mean << " - " << intervalMs
+            << ") <= " << intervalMs * ALLOWED_MEAN_ERROR_RATIO
+            << " millis, when the requested interval is " << intervalMs << " millis.";
+
+    double maxStdev = std::max(MIN_STDEV_MS, intervalMs * ALLOWED_STDEV_ERROR_RATIO);
+    EXPECT_TRUE(stdev <= maxStdev)
+            << "Test failed, because the stdev of intervals is " << stdev
+            << " millis, which must be <= " << maxStdev
+            << " millis, when the requested interval is " << intervalMs << " millis.";
+    ALOGD("Mean of interval deltas in millis: %.1lf", mean);
+    ALOGD("Stdev of interval deltas in millis: %.1lf", stdev);
+}
diff --git a/gnss/aidl/vts/gnss_hal_test.h b/gnss/aidl/vts/gnss_hal_test.h
index d479af3..645fc82 100644
--- a/gnss/aidl/vts/gnss_hal_test.h
+++ b/gnss/aidl/vts/gnss_hal_test.h
@@ -25,6 +25,7 @@
 #include <android/hardware/gnss/2.1/IGnss.h>
 #include "GnssBatchingCallback.h"
 #include "GnssCallbackAidl.h"
+#include "GnssMeasurementCallbackAidl.h"
 #include "v2_1/gnss_hal_test_template.h"
 
 using IGnss_V2_1 = android::hardware::gnss::V2_1::IGnss;
@@ -68,8 +69,11 @@
                        const bool check_speed);
     void SetPositionMode(const int min_interval_msec, const bool low_power_mode);
     bool StartAndCheckFirstLocation(const int min_interval_msec, const bool low_power_mode);
+    bool StartAndCheckFirstLocation(const int min_interval_msec, const bool low_power_mode,
+                                    const bool start_sv_status, const bool start_nmea);
     void StopAndClearLocations();
-    void StartAndCheckLocations(int count);
+    void StartAndCheckLocations(const int count);
+    void StartAndCheckLocations(const int count, const bool start_sv_status, const bool start_nmea);
 
     android::hardware::gnss::GnssConstellationType startLocationAndGetNonGpsConstellation(
             const int locations_to_await, const int gnss_sv_info_list_timeout);
@@ -85,6 +89,19 @@
                     sv_info_list,
             const int min_observations);
 
+    void checkGnssMeasurementClockFields(const android::hardware::gnss::GnssData& measurement);
+    void checkGnssMeasurementFlags(const android::hardware::gnss::GnssMeasurement& measurement);
+    void checkGnssMeasurementFields(const android::hardware::gnss::GnssMeasurement& measurement,
+                                    const android::hardware::gnss::GnssData& data);
+    void startMeasurementWithInterval(
+            int intervalMillis,
+            const sp<android::hardware::gnss::IGnssMeasurementInterface>& iMeasurement,
+            sp<GnssMeasurementCallbackAidl>& callback);
+    void collectMeasurementIntervals(const sp<GnssMeasurementCallbackAidl>& callback,
+                                     const int numMeasurementEvents, const int timeoutSeconds,
+                                     std::vector<int>& deltaMs);
+    void assertMeanAndStdev(int intervalMillis, std::vector<int>& deltasMillis);
+
     sp<IGnssAidl> aidl_gnss_hal_;
     sp<GnssCallbackAidl> aidl_gnss_cb_;  // Primary callback interface
 };
diff --git a/gnss/aidl/vts/gnss_hal_test_cases.cpp b/gnss/aidl/vts/gnss_hal_test_cases.cpp
index 54946fb..f926c40 100644
--- a/gnss/aidl/vts/gnss_hal_test_cases.cpp
+++ b/gnss/aidl/vts/gnss_hal_test_cases.cpp
@@ -28,7 +28,9 @@
 #include <android/hardware/gnss/measurement_corrections/IMeasurementCorrectionsInterface.h>
 #include <android/hardware/gnss/visibility_control/IGnssVisibilityControl.h>
 #include <cutils/properties.h>
+#include <utils/SystemClock.h>
 #include <cmath>
+#include <utility>
 #include "AGnssCallbackAidl.h"
 #include "AGnssRilCallbackAidl.h"
 #include "GnssAntennaInfoCallbackAidl.h"
@@ -376,58 +378,6 @@
     }
 }
 
-void CheckGnssMeasurementClockFields(const GnssData& measurement) {
-    Utils::checkElapsedRealtime(measurement.elapsedRealtime);
-    ASSERT_TRUE(measurement.clock.gnssClockFlags >= 0 &&
-                measurement.clock.gnssClockFlags <=
-                        (GnssClock::HAS_LEAP_SECOND | GnssClock::HAS_TIME_UNCERTAINTY |
-                         GnssClock::HAS_FULL_BIAS | GnssClock::HAS_BIAS |
-                         GnssClock::HAS_BIAS_UNCERTAINTY | GnssClock::HAS_DRIFT |
-                         GnssClock::HAS_DRIFT_UNCERTAINTY));
-}
-
-void CheckGnssMeasurementFlags(const GnssMeasurement& measurement) {
-    ASSERT_TRUE(measurement.flags >= 0 &&
-                measurement.flags <=
-                        (GnssMeasurement::HAS_SNR | GnssMeasurement::HAS_CARRIER_FREQUENCY |
-                         GnssMeasurement::HAS_CARRIER_CYCLES | GnssMeasurement::HAS_CARRIER_PHASE |
-                         GnssMeasurement::HAS_CARRIER_PHASE_UNCERTAINTY |
-                         GnssMeasurement::HAS_AUTOMATIC_GAIN_CONTROL |
-                         GnssMeasurement::HAS_FULL_ISB | GnssMeasurement::HAS_FULL_ISB_UNCERTAINTY |
-                         GnssMeasurement::HAS_SATELLITE_ISB |
-                         GnssMeasurement::HAS_SATELLITE_ISB_UNCERTAINTY |
-                         GnssMeasurement::HAS_SATELLITE_PVT |
-                         GnssMeasurement::HAS_CORRELATION_VECTOR));
-}
-
-void CheckGnssMeasurementFields(const GnssMeasurement& measurement, const GnssData& data) {
-    CheckGnssMeasurementFlags(measurement);
-    // Verify CodeType is valid.
-    ASSERT_NE(measurement.signalType.codeType, "");
-    // Verify basebandCn0DbHz is valid.
-    ASSERT_TRUE(measurement.basebandCN0DbHz > 0.0 && measurement.basebandCN0DbHz <= 65.0);
-
-    if (((measurement.flags & GnssMeasurement::HAS_FULL_ISB) > 0) &&
-        ((measurement.flags & GnssMeasurement::HAS_FULL_ISB_UNCERTAINTY) > 0) &&
-        ((measurement.flags & GnssMeasurement::HAS_SATELLITE_ISB) > 0) &&
-        ((measurement.flags & GnssMeasurement::HAS_SATELLITE_ISB_UNCERTAINTY) > 0)) {
-        GnssConstellationType referenceConstellation =
-                data.clock.referenceSignalTypeForIsb.constellation;
-        double carrierFrequencyHz = data.clock.referenceSignalTypeForIsb.carrierFrequencyHz;
-        std::string codeType = data.clock.referenceSignalTypeForIsb.codeType;
-
-        ASSERT_TRUE(referenceConstellation >= GnssConstellationType::UNKNOWN &&
-                    referenceConstellation <= GnssConstellationType::IRNSS);
-        ASSERT_TRUE(carrierFrequencyHz > 0);
-        ASSERT_NE(codeType, "");
-
-        ASSERT_TRUE(std::abs(measurement.fullInterSignalBiasNs) < 1.0e6);
-        ASSERT_TRUE(measurement.fullInterSignalBiasUncertaintyNs >= 0);
-        ASSERT_TRUE(std::abs(measurement.satelliteInterSignalBiasNs) < 1.0e6);
-        ASSERT_TRUE(measurement.satelliteInterSignalBiasUncertaintyNs >= 0);
-    }
-}
-
 /*
  * TestGnssMeasurementExtensionAndSatellitePvt:
  * 1. Gets the GnssMeasurementExtension and verifies that it returns a non-null extension.
@@ -465,10 +415,10 @@
         ASSERT_TRUE(lastMeasurement.measurements.size() > 0);
 
         // Validity check GnssData fields
-        CheckGnssMeasurementClockFields(lastMeasurement);
+        checkGnssMeasurementClockFields(lastMeasurement);
 
         for (const auto& measurement : lastMeasurement.measurements) {
-            CheckGnssMeasurementFields(measurement, lastMeasurement);
+            checkGnssMeasurementFields(measurement, lastMeasurement);
             if (measurement.flags & GnssMeasurement::HAS_SATELLITE_PVT &&
                 kIsSatellitePvtSupported == true) {
                 ALOGD("Found a measurement with SatellitePvt");
@@ -525,10 +475,10 @@
         ASSERT_TRUE(lastMeasurement.measurements.size() > 0);
 
         // Validity check GnssData fields
-        CheckGnssMeasurementClockFields(lastMeasurement);
+        checkGnssMeasurementClockFields(lastMeasurement);
 
         for (const auto& measurement : lastMeasurement.measurements) {
-            CheckGnssMeasurementFields(measurement, lastMeasurement);
+            checkGnssMeasurementFields(measurement, lastMeasurement);
             if (measurement.flags & GnssMeasurement::HAS_CORRELATION_VECTOR) {
                 correlationVectorFound = true;
                 ASSERT_TRUE(measurement.correlationVectors.size() > 0);
@@ -1242,48 +1192,6 @@
 }
 
 /*
- * TestGnssMeasurementSetCallbackWithOptions:
- * 1. Gets the GnssMeasurementExtension and verifies that it returns a non-null extension.
- * 2. Sets a GnssMeasurementCallback with intervalMillis option, waits for measurements reported,
- *    and verifies mandatory fields are valid.
- */
-TEST_P(GnssHalTest, TestGnssMeasurementSetCallbackWithOptions) {
-    if (aidl_gnss_hal_->getInterfaceVersion() <= 1) {
-        return;
-    }
-    const int kFirstGnssMeasurementTimeoutSeconds = 10;
-    const int kNumMeasurementEvents = 5;
-
-    sp<IGnssMeasurementInterface> iGnssMeasurement;
-    auto status = aidl_gnss_hal_->getExtensionGnssMeasurement(&iGnssMeasurement);
-    ASSERT_TRUE(status.isOk());
-    ASSERT_TRUE(iGnssMeasurement != nullptr);
-
-    auto callback = sp<GnssMeasurementCallbackAidl>::make();
-    IGnssMeasurementInterface::Options options;
-    options.intervalMs = 2000;
-    status = iGnssMeasurement->setCallbackWithOptions(callback, options);
-    ASSERT_TRUE(status.isOk());
-
-    for (int i = 0; i < kNumMeasurementEvents; i++) {
-        GnssData lastMeasurement;
-        ASSERT_TRUE(callback->gnss_data_cbq_.retrieve(lastMeasurement,
-                                                      kFirstGnssMeasurementTimeoutSeconds));
-        EXPECT_EQ(callback->gnss_data_cbq_.calledCount(), i + 1);
-        ASSERT_TRUE(lastMeasurement.measurements.size() > 0);
-
-        // Validity check GnssData fields
-        CheckGnssMeasurementClockFields(lastMeasurement);
-        for (const auto& measurement : lastMeasurement.measurements) {
-            CheckGnssMeasurementFields(measurement, lastMeasurement);
-        }
-    }
-
-    status = iGnssMeasurement->close();
-    ASSERT_TRUE(status.isOk());
-}
-
-/*
  * TestGnssAgcInGnssMeasurement:
  * 1. Gets the GnssMeasurementExtension and verifies that it returns a non-null extension.
  * 2. Sets a GnssMeasurementCallback, waits for a measurement.
@@ -1293,7 +1201,7 @@
         return;
     }
     const int kFirstGnssMeasurementTimeoutSeconds = 10;
-    const int kNumMeasurementEvents = 15;
+    const int kNumMeasurementEvents = 5;
 
     sp<IGnssMeasurementInterface> iGnssMeasurement;
     auto status = aidl_gnss_hal_->getExtensionGnssMeasurement(&iGnssMeasurement);
@@ -1313,7 +1221,7 @@
         ASSERT_TRUE(lastMeasurement.measurements.size() > 0);
 
         // Validity check GnssData fields
-        CheckGnssMeasurementClockFields(lastMeasurement);
+        checkGnssMeasurementClockFields(lastMeasurement);
 
         ASSERT_TRUE(lastMeasurement.gnssAgcs.size() > 0);
         for (const auto& gnssAgc : lastMeasurement.gnssAgcs) {
@@ -1444,3 +1352,143 @@
             Utils::getMockMeasurementCorrections_aidl());
     ASSERT_TRUE(status.isOk());
 }
+
+/*
+ * TestStopSvStatusAndNmea:
+ * 1. Call stopSvStatus and stopNmea.
+ * 2. Start location and verify that
+ *    - no SvStatus is received.
+ *    - no Nmea is received.
+ */
+TEST_P(GnssHalTest, TestStopSvStatusAndNmea) {
+    if (aidl_gnss_hal_->getInterfaceVersion() <= 1) {
+        return;
+    }
+    auto status = aidl_gnss_hal_->stopSvStatus();
+    EXPECT_TRUE(status.isOk());
+    status = aidl_gnss_hal_->stopNmea();
+    EXPECT_TRUE(status.isOk());
+
+    int kLocationsToAwait = 5;
+    aidl_gnss_cb_->location_cbq_.reset();
+    aidl_gnss_cb_->sv_info_list_cbq_.reset();
+    aidl_gnss_cb_->nmea_cbq_.reset();
+    StartAndCheckLocations(/* count= */ kLocationsToAwait,
+                           /* start_sv_status= */ false, /* start_nmea= */ false);
+    int location_called_count = aidl_gnss_cb_->location_cbq_.calledCount();
+    ALOGD("Observed %d GnssSvStatus, and %d Nmea while awaiting %d locations (%d received)",
+          aidl_gnss_cb_->sv_info_list_cbq_.size(), aidl_gnss_cb_->nmea_cbq_.size(),
+          kLocationsToAwait, location_called_count);
+
+    // Ensure that no SvStatus & no Nmea is received.
+    EXPECT_EQ(aidl_gnss_cb_->sv_info_list_cbq_.size(), 0);
+    EXPECT_EQ(aidl_gnss_cb_->nmea_cbq_.size(), 0);
+
+    StopAndClearLocations();
+}
+
+/*
+ * TestGnssMeasurementIntervals_WithoutLocation:
+ * 1. start measurement with interval
+ * 2. verify that the received measurement intervals have expected mean and stdev
+ */
+TEST_P(GnssHalTest, TestGnssMeasurementIntervals_WithoutLocation) {
+    if (aidl_gnss_hal_->getInterfaceVersion() <= 1) {
+        return;
+    }
+
+    std::vector<int> intervals({2000, 4000});
+    std::vector<int> numEvents({10, 5});
+
+    sp<IGnssMeasurementInterface> iGnssMeasurement;
+    auto status = aidl_gnss_hal_->getExtensionGnssMeasurement(&iGnssMeasurement);
+    ASSERT_TRUE(status.isOk());
+    ASSERT_TRUE(iGnssMeasurement != nullptr);
+
+    ALOGD("TestGnssMeasurementIntervals_WithoutLocation");
+    for (int i = 0; i < intervals.size(); i++) {
+        auto callback = sp<GnssMeasurementCallbackAidl>::make();
+        startMeasurementWithInterval(intervals[i], iGnssMeasurement, callback);
+
+        std::vector<int> deltas;
+        collectMeasurementIntervals(callback, numEvents[i], /* timeoutSeconds= */ 10, deltas);
+
+        status = iGnssMeasurement->close();
+        ASSERT_TRUE(status.isOk());
+
+        assertMeanAndStdev(intervals[i], deltas);
+    }
+}
+
+/*
+ * TestGnssMeasurementIntervals_LocationOnBeforeMeasurement:
+ * 1. start measurement with interval
+ * 2. verify that the received measurement intervals have expected mean and stdev
+ */
+TEST_P(GnssHalTest, TestGnssMeasurementIntervals_LocationOnBeforeMeasurement) {
+    if (aidl_gnss_hal_->getInterfaceVersion() <= 1) {
+        return;
+    }
+
+    std::vector<int> intervals({2000});
+
+    sp<IGnssMeasurementInterface> iGnssMeasurement;
+    auto status = aidl_gnss_hal_->getExtensionGnssMeasurement(&iGnssMeasurement);
+    ASSERT_TRUE(status.isOk());
+    ASSERT_TRUE(iGnssMeasurement != nullptr);
+
+    int locationIntervalMs = 1000;
+
+    // Start location first and then start measurement
+    ALOGD("TestGnssMeasurementIntervals_LocationOnBeforeMeasurement");
+    StartAndCheckFirstLocation(locationIntervalMs, /* lowPowerMode= */ false);
+    for (auto& intervalMs : intervals) {
+        auto callback = sp<GnssMeasurementCallbackAidl>::make();
+        startMeasurementWithInterval(intervalMs, iGnssMeasurement, callback);
+
+        std::vector<int> deltas;
+        collectMeasurementIntervals(callback, /*numEvents=*/10, /*timeoutSeconds=*/10, deltas);
+
+        status = iGnssMeasurement->close();
+        ASSERT_TRUE(status.isOk());
+
+        assertMeanAndStdev(locationIntervalMs, deltas);
+    }
+    StopAndClearLocations();
+}
+
+/*
+ * TestGnssMeasurementIntervals:
+ * 1. start measurement with interval
+ * 2. verify that the received measurement intervals have expected mean and stdev
+ */
+TEST_P(GnssHalTest, TestGnssMeasurementIntervals_LocationOnAfterMeasurement) {
+    if (aidl_gnss_hal_->getInterfaceVersion() <= 1) {
+        return;
+    }
+
+    std::vector<int> intervals({2000});
+
+    sp<IGnssMeasurementInterface> iGnssMeasurement;
+    auto status = aidl_gnss_hal_->getExtensionGnssMeasurement(&iGnssMeasurement);
+    ASSERT_TRUE(status.isOk());
+    ASSERT_TRUE(iGnssMeasurement != nullptr);
+
+    int locationIntervalMs = 1000;
+    // Start location first and then start measurement
+    ALOGD("TestGnssMeasurementIntervals_LocationOnAfterMeasurement");
+    for (auto& intervalMs : intervals) {
+        auto callback = sp<GnssMeasurementCallbackAidl>::make();
+        startMeasurementWithInterval(intervalMs, iGnssMeasurement, callback);
+
+        StartAndCheckFirstLocation(locationIntervalMs, /* lowPowerMode= */ false);
+        std::vector<int> deltas;
+        collectMeasurementIntervals(callback, /*numEvents=*/10, /*timeoutSeconds=*/10, deltas);
+
+        StopAndClearLocations();
+        status = iGnssMeasurement->close();
+        ASSERT_TRUE(status.isOk());
+
+        assertMeanAndStdev(locationIntervalMs, deltas);
+    }
+}