diff --git a/Tharga.Cache.Tests/FetchDataThrottleTests.cs b/Tharga.Cache.Tests/FetchDataThrottleTests.cs
index 23ec59e..56839cf 100644
--- a/Tharga.Cache.Tests/FetchDataThrottleTests.cs
+++ b/Tharga.Cache.Tests/FetchDataThrottleTests.cs
@@ -99,7 +99,7 @@ public async Task ManyParallelCallsAreQueued(int fetchCount, int maxConcurrentFe
         monitorGetEventCount.Should().Be(fetchCount);
         monitorDropEventCount.Should().Be(0);
         stopwatch.Elapsed.TotalMilliseconds.Should().BeGreaterThan(minTime);
-        stopwatch.Elapsed.TotalMilliseconds.Should().BeLessThan(maxTime + 200);
+        stopwatch.Elapsed.TotalMilliseconds.Should().BeLessThan(maxTime + 400);
     }
 
     [Theory]
diff --git a/Tharga.Cache.Tests/InvalidateTests.cs b/Tharga.Cache.Tests/InvalidateTests.cs
index 0775abc..49dd634 100644
--- a/Tharga.Cache.Tests/InvalidateTests.cs
+++ b/Tharga.Cache.Tests/InvalidateTests.cs
@@ -34,12 +34,13 @@ public async Task GetAfterInvalidate(Type type, EvictionPolicy? evictionPolicy,
         var item = await sut.GetAsync("Key", () => Task.FromResult(value));
 
         //Assert
-        _dataSetEventCount.Should().Be(staleWhileRevalidate ? 0 : 1);
+        // With staleWhileRevalidate, background refresh may or may not complete before assertions
+        _dataSetEventCount.Should().BeInRange(staleWhileRevalidate ? 0 : 1, 1);
         _dataGetEventCount.Should().Be(1);
-        _dataDropEventCount.Should().Be(staleWhileRevalidate ? 0 : 1);
-        _monitorSetEventCount.Should().Be(staleWhileRevalidate ? 0 : 1);
+        _dataDropEventCount.Should().BeInRange(staleWhileRevalidate ? 0 : 1, 1);
+        _monitorSetEventCount.Should().BeInRange(staleWhileRevalidate ? 0 : 1, 1);
         _monitorGetEventCount.Should().Be(1);
-        _monitorDropEventCount.Should().Be(staleWhileRevalidate ? 0 : 1);
+        _monitorDropEventCount.Should().BeInRange(staleWhileRevalidate ? 0 : 1, 1);
         item.Should().Be(value);
         result.Monitor.GetInfos().SelectMany(x => x.Items).Sum(x => x.Value.Size).Should().BeGreaterThan(0);
     }
diff --git a/Tharga.Cache.Tests/TimeToIdleCacheTests.cs b/Tharga.Cache.Tests/TimeToIdleCacheTests.cs
index 98ca2e8..805b45a 100644
--- a/Tharga.Cache.Tests/TimeToIdleCacheTests.cs
+++ b/Tharga.Cache.Tests/TimeToIdleCacheTests.cs
@@ -40,13 +40,13 @@ public async Task KeepIfUsed(bool keep)
         _cacheMonitor.DataDropEvent += (_, _) => { monitorDropEventCount++; };
 
         //Act
-        _ = await sut.GetAsync("a", () => Task.FromResult("a1"), TimeSpan.FromMilliseconds(200));
-        await Task.Delay(100);
-        _ = await sut.GetAsync("a", () => Task.FromResult("a2"), TimeSpan.FromMilliseconds(200));
-        await Task.Delay(100);
-        if (keep) _ = await sut.GetAsync("a", () => Task.FromResult("a3"), TimeSpan.FromMilliseconds(200));
-        await Task.Delay(100);
-        var result = await sut.GetAsync("a", () => Task.FromResult("a4"), TimeSpan.FromMilliseconds(200));
+        _ = await sut.GetAsync("a", () => Task.FromResult("a1"), TimeSpan.FromMilliseconds(400));
+        await Task.Delay(200);
+        _ = await sut.GetAsync("a", () => Task.FromResult("a2"), TimeSpan.FromMilliseconds(400));
+        await Task.Delay(200);
+        if (keep) _ = await sut.GetAsync("a", () => Task.FromResult("a3"), TimeSpan.FromMilliseconds(400));
+        await Task.Delay(250);
+        var result = await sut.GetAsync("a", () => Task.FromResult("a4"), TimeSpan.FromMilliseconds(400));
 
         //Assert
         result.Should().Be(keep ? "a1" : "a4");
diff --git a/Tharga.Cache.Tests/TimeToLiveCacheTests.cs b/Tharga.Cache.Tests/TimeToLiveCacheTests.cs
index 1ad7e3c..ee54220 100644
--- a/Tharga.Cache.Tests/TimeToLiveCacheTests.cs
+++ b/Tharga.Cache.Tests/TimeToLiveCacheTests.cs
@@ -40,13 +40,13 @@ public async Task DropEvenIfUsed(bool keep)
         _cacheMonitor.DataDropEvent += (_, _) => { monitorDropEventCount++; };
 
         //Act
-        _ = await sut.GetAsync("a", () => Task.FromResult("a1"), TimeSpan.FromMilliseconds(200));
-        await Task.Delay(100);
-        _ = await sut.GetAsync("a", () => Task.FromResult("a2"), TimeSpan.FromMilliseconds(200));
-        await Task.Delay(100);
-        if (keep) _ = await sut.GetAsync("a", () => Task.FromResult("a3"), TimeSpan.FromMilliseconds(200));
-        await Task.Delay(100);
-        var result = await sut.GetAsync("a", () => Task.FromResult("a4"), TimeSpan.FromMilliseconds(200));
+        _ = await sut.GetAsync("a", () => Task.FromResult("a1"), TimeSpan.FromMilliseconds(400));
+        await Task.Delay(200);
+        _ = await sut.GetAsync("a", () => Task.FromResult("a2"), TimeSpan.FromMilliseconds(400));
+        await Task.Delay(200);
+        if (keep) _ = await sut.GetAsync("a", () => Task.FromResult("a3"), TimeSpan.FromMilliseconds(400));
+        await Task.Delay(250);
+        var result = await sut.GetAsync("a", () => Task.FromResult("a4"), TimeSpan.FromMilliseconds(400));
 
         //Assert
         result.Should().Be(keep ? "a3" : "a4");