diff --git a/test/Datadog.Trace.Tests/ApiTests.cs b/test/Datadog.Trace.Tests/ApiTests.cs
index 7078ea0af49a..7f981ef3a3da 100644
--- a/test/Datadog.Trace.Tests/ApiTests.cs
+++ b/test/Datadog.Trace.Tests/ApiTests.cs
@@ -61,7 +61,7 @@ public async Task SendTracesAsync_500_ErrorIsCaught()
             sw.Stop();
 
             Assert.Equal(5, handler.RequestsCount);
-            Assert.InRange(sw.ElapsedMilliseconds, 1500, 10000); // should be ~ 1600ms
+            Assert.InRange(sw.ElapsedMilliseconds, 1000, 12000); // should be ~ 1600ms
 
             // TODO:bertrand check that it's properly logged
         }
diff --git a/test/Datadog.Trace.Tests/Sampling/RateLimiterTests.cs b/test/Datadog.Trace.Tests/Sampling/RateLimiterTests.cs
index b5662b295aa0..311fc1c95349 100644
--- a/test/Datadog.Trace.Tests/Sampling/RateLimiterTests.cs
+++ b/test/Datadog.Trace.Tests/Sampling/RateLimiterTests.cs
@@ -74,9 +74,9 @@ private static void Run_Limit_Test(int? intervalLimit, int numberPerBurst, int n
             var totalMilliseconds = result.TimeElapsed.TotalMilliseconds;
 
             var expectedLimit = totalMilliseconds * actualIntervalLimit / 1_000;
-
-            var upperLimit = expectedLimit + (actualIntervalLimit * 0.8);
-            var lowerLimit = expectedLimit - (actualIntervalLimit * 0.8);
+            var acceptableDifference = (actualIntervalLimit * 0.80);
+            var upperLimit = expectedLimit + acceptableDifference;
+            var lowerLimit = expectedLimit - acceptableDifference;
 
             Assert.True(
                 result.TotalAllowed >= lowerLimit && result.TotalAllowed <= upperLimit,
@@ -88,7 +88,7 @@ private static void Run_Limit_Test(int? intervalLimit, int numberPerBurst, int n
             var totalExpectedAllowed = 2 * actualIntervalLimit;
             var expectedRate = totalExpectedAllowed / (float)totalExpectedSent;
 
-            var maxPercentVariance = 0.20f;
+            var maxPercentVariance = 0.35f;
             var lowestRate = expectedRate - maxPercentVariance;
             var highestRate = expectedRate + maxPercentVariance;