diff --git a/toolkit/components/telemetry/tests/gtest/TestHistograms.cpp b/toolkit/components/telemetry/tests/gtest/TestHistograms.cpp
index 53f3241f88cf..96de60f4ddfe 100644
--- a/toolkit/components/telemetry/tests/gtest/TestHistograms.cpp
+++ b/toolkit/components/telemetry/tests/gtest/TestHistograms.cpp
@@ -722,173 +722,3 @@ TEST_F(TelemetryTestFixture, AccumulateKeyedCategoricalHistogram_MultipleEnumVal
         << "The sampleKey histogram did not accumulate the correct number of Label2 samples";
 }
 
-TEST_F(TelemetryTestFixture, AccumulateTimeDelta)
-{
-  const uint32_t kExpectedValue = 100;
-  const TimeStamp start = TimeStamp::Now();
-  const TimeDuration delta = TimeDuration::FromMilliseconds(50);
-
-  AutoJSContextWithGlobal cx(mCleanGlobal);
-
-  GetAndClearHistogram(cx.GetJSContext(), mTelemetry, NS_LITERAL_CSTRING("TELEMETRY_TEST_COUNT"),
-                       false);
-
-  // Accumulate in the histogram
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_COUNT, start - delta, start);
-
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_COUNT, start - delta, start);
-
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_COUNT, start, start);
-
-  // end > start timestamp gives zero contribution
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_COUNT, start + delta, start);
-
-  // Get a snapshot for all the histograms
-  JS::RootedValue snapshot(cx.GetJSContext());
-  GetSnapshots(cx.GetJSContext(), mTelemetry, "TELEMETRY_TEST_COUNT", &snapshot, false);
-
-  // Get the histogram from the snapshot
-  JS::RootedValue histogram(cx.GetJSContext());
-  GetProperty(cx.GetJSContext(), "TELEMETRY_TEST_COUNT", snapshot, &histogram);
-
-  // Get "sum" property from histogram
-  JS::RootedValue sum(cx.GetJSContext());
-  GetProperty(cx.GetJSContext(), "sum", histogram,  &sum);
-
-  // Check that the "sum" stored in the histogram matches with |kExpectedValue|
-  uint32_t uSum = 0;
-  JS::ToUint32(cx.GetJSContext(), sum, &uSum);
-  ASSERT_EQ(uSum, kExpectedValue) << "The histogram is not returning expected value";
-}
-
-TEST_F(TelemetryTestFixture, AccumulateKeyedTimeDelta)
-{
-  const uint32_t kExpectedValue = 100;
-  const TimeStamp start = TimeStamp::Now();
-  const TimeDuration delta = TimeDuration::FromMilliseconds(50);
-
-  AutoJSContextWithGlobal cx(mCleanGlobal);
-
-  GetAndClearHistogram(cx.GetJSContext(), mTelemetry,
-                       NS_LITERAL_CSTRING("TELEMETRY_TEST_KEYED_COUNT"), true);
-
-  // Accumulate time delta in the provided key within the histogram
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_KEYED_COUNT, NS_LITERAL_CSTRING("sample"),
-                                 start - delta, start);
-
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_KEYED_COUNT, NS_LITERAL_CSTRING("sample"),
-                                 start - delta, start);
-
-  // end > start timestamp gives zero contribution
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_KEYED_COUNT, NS_LITERAL_CSTRING("sample"),
-                                 start + delta, start);
-
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_KEYED_COUNT, NS_LITERAL_CSTRING("sample"),
-                                 start, start);
-
-  // Get a snapshot for all the histograms
-  JS::RootedValue snapshot(cx.GetJSContext());
-  GetSnapshots(cx.GetJSContext(), mTelemetry, "TELEMETRY_TEST_KEYED_COUNT", &snapshot, true);
-
-  // Get the histogram from the snapshot
-  JS::RootedValue histogram(cx.GetJSContext());
-  GetProperty(cx.GetJSContext(), "TELEMETRY_TEST_KEYED_COUNT", snapshot, &histogram);
-
-  // Get "sample" property from histogram
-  JS::RootedValue expectedKeyData(cx.GetJSContext());
-  GetProperty(cx.GetJSContext(), "sample", histogram,  &expectedKeyData);
-
-  // Get "sum" property from keyed data
-  JS::RootedValue sum(cx.GetJSContext());
-  GetProperty(cx.GetJSContext(), "sum", expectedKeyData,  &sum);
-
-  // Check that the sum stored in the histogram matches with |kExpectedValue|
-  uint32_t uSum = 0;
-  JS::ToUint32(cx.GetJSContext(), sum, &uSum);
-  ASSERT_EQ(uSum, kExpectedValue) << "The histogram is not returning expected sum";
-}
-TEST_F(TelemetryTestFixture, AccumulateTimeDelta)
-{
-  const uint32_t kExpectedValue = 100;
-  const TimeStamp start = TimeStamp::Now();
-  const TimeDuration delta = TimeDuration::FromMilliseconds(50);
-
-  AutoJSContextWithGlobal cx(mCleanGlobal);
-
-  GetAndClearHistogram(cx.GetJSContext(), mTelemetry, NS_LITERAL_CSTRING("TELEMETRY_TEST_COUNT"),
-                       false);
-
-  // Accumulate in the histogram
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_COUNT, start - delta, start);
-
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_COUNT, start - delta, start);
-
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_COUNT, start, start);
-
-  // end > start timestamp gives zero contribution
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_COUNT, start + delta, start);
-
-  // Get a snapshot for all the histograms
-  JS::RootedValue snapshot(cx.GetJSContext());
-  GetSnapshots(cx.GetJSContext(), mTelemetry, "TELEMETRY_TEST_COUNT", &snapshot, false);
-
-  // Get the histogram from the snapshot
-  JS::RootedValue histogram(cx.GetJSContext());
-  GetProperty(cx.GetJSContext(), "TELEMETRY_TEST_COUNT", snapshot, &histogram);
-
-  // Get "sum" property from histogram
-  JS::RootedValue sum(cx.GetJSContext());
-  GetProperty(cx.GetJSContext(), "sum", histogram,  &sum);
-
-  // Check that the "sum" stored in the histogram matches with |kExpectedValue|
-  uint32_t uSum = 0;
-  JS::ToUint32(cx.GetJSContext(), sum, &uSum);
-  ASSERT_EQ(uSum, kExpectedValue) << "The histogram is not returning expected value";
-}
-
-TEST_F(TelemetryTestFixture, AccumulateKeyedTimeDelta)
-{
-  const uint32_t kExpectedValue = 100;
-  const TimeStamp start = TimeStamp::Now();
-  const TimeDuration delta = TimeDuration::FromMilliseconds(50);
-
-  AutoJSContextWithGlobal cx(mCleanGlobal);
-
-  GetAndClearHistogram(cx.GetJSContext(), mTelemetry,
-                       NS_LITERAL_CSTRING("TELEMETRY_TEST_KEYED_COUNT"), true);
-
-  // Accumulate time delta in the provided key within the histogram
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_KEYED_COUNT, NS_LITERAL_CSTRING("sample"),
-                                 start - delta, start);
-
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_KEYED_COUNT, NS_LITERAL_CSTRING("sample"),
-                                 start - delta, start);
-
-  // end > start timestamp gives zero contribution
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_KEYED_COUNT, NS_LITERAL_CSTRING("sample"),
-                                 start + delta, start);
-
-  Telemetry::AccumulateTimeDelta(Telemetry::TELEMETRY_TEST_KEYED_COUNT, NS_LITERAL_CSTRING("sample"),
-                                 start, start);
-
-  // Get a snapshot for all the histograms
-  JS::RootedValue snapshot(cx.GetJSContext());
-  GetSnapshots(cx.GetJSContext(), mTelemetry, "TELEMETRY_TEST_KEYED_COUNT", &snapshot, true);
-
-  // Get the histogram from the snapshot
-  JS::RootedValue histogram(cx.GetJSContext());
-  GetProperty(cx.GetJSContext(), "TELEMETRY_TEST_KEYED_COUNT", snapshot, &histogram);
-
-  // Get "sample" property from histogram
-  JS::RootedValue expectedKeyData(cx.GetJSContext());
-  GetProperty(cx.GetJSContext(), "sample", histogram,  &expectedKeyData);
-
-  // Get "sum" property from keyed data
-  JS::RootedValue sum(cx.GetJSContext());
-  GetProperty(cx.GetJSContext(), "sum", expectedKeyData,  &sum);
-
-  // Check that the sum stored in the histogram matches with |kExpectedValue|
-  uint32_t uSum = 0;
-  JS::ToUint32(cx.GetJSContext(), sum, &uSum);
-  ASSERT_EQ(uSum, kExpectedValue) << "The histogram is not returning expected sum";
-}