diff --git a/lib/PuppeteerSharp.Tests/PageTests/WaitForNetworkIdleTests.cs b/lib/PuppeteerSharp.Tests/PageTests/WaitForNetworkIdleTests.cs
index 2ad1881bc..a6b638b40 100644
--- a/lib/PuppeteerSharp.Tests/PageTests/WaitForNetworkIdleTests.cs
+++ b/lib/PuppeteerSharp.Tests/PageTests/WaitForNetworkIdleTests.cs
@@ -18,11 +18,16 @@ public WaitForNetworkIdleTests(ITestOutputHelper output) : base(output)
         [PuppeteerFact]
         public async Task ShouldWork()
         {
-            var t1 = DateTime.Now;
-            var t2 = DateTime.Now;
+            var t1 = DateTime.UtcNow;
+            var t2 = DateTime.UtcNow;
 
             await Page.GoToAsync(TestConstants.EmptyPage);
-            var task = Page.WaitForNetworkIdleAsync().ContinueWith(x => t1 = DateTime.Now);
+            var task = Page.WaitForNetworkIdleAsync()
+                .ContinueWith(x =>
+                {
+                    if (x.IsFaulted) throw x.Exception;
+                    return t1 = DateTime.UtcNow;
+                });
 
             await Task.WhenAll(
                 task,
@@ -35,7 +40,11 @@ await Promise.all([
                     await fetch('/digits/3.png');
                     await new Promise((resolve) => setTimeout(resolve, 200));
                     await fetch('/digits/4.png');
-                }").ContinueWith(x => t2 = DateTime.Now)
+                }").ContinueWith(x =>
+                {
+                    if (x.IsFaulted) throw x.Exception;
+                    t2 = DateTime.UtcNow;
+                })
             );
 
             Assert.True(t1 > t2);
@@ -59,11 +68,16 @@ public async Task ShouldRespectTimeout()
         [SkipBrowserFact(skipFirefox: true)]
         public async Task ShouldRespectIdleTimeout()
         {
-            var t1 = DateTime.Now;
-            var t2 = DateTime.Now;
+            var t1 = DateTime.UtcNow;
+            var t2 = DateTime.UtcNow;
 
             await Page.GoToAsync(TestConstants.EmptyPage);
-            var task = Page.WaitForNetworkIdleAsync(new WaitForNetworkIdleOptions { IdleTime = 10 }).ContinueWith(x => t1 = DateTime.Now);
+            var task = Page.WaitForNetworkIdleAsync(new WaitForNetworkIdleOptions { IdleTime = 10 })
+                .ContinueWith(x =>
+                {
+                    if (x.IsFaulted) throw x.Exception;
+                    return t1 = DateTime.UtcNow;
+                });
 
             await Task.WhenAll(
                 task,
@@ -73,7 +87,11 @@ await Promise.all([
                     fetch('/digits/2.png'),
                     ]);
                     await new Promise((resolve) => setTimeout(resolve, 250));
-                }").ContinueWith(x => t2 = DateTime.Now)
+                }").ContinueWith(x =>
+                {
+                    if (x.IsFaulted) throw x.Exception;
+                    return t2 = DateTime.UtcNow;
+                })
             );
 
             Assert.True(t2 > t1);
diff --git a/lib/PuppeteerSharp.Tests/WaitTaskTests/FrameWaitForFunctionTests.cs b/lib/PuppeteerSharp.Tests/WaitTaskTests/FrameWaitForFunctionTests.cs
index 11f22d781..e6d678170 100644
--- a/lib/PuppeteerSharp.Tests/WaitTaskTests/FrameWaitForFunctionTests.cs
+++ b/lib/PuppeteerSharp.Tests/WaitTaskTests/FrameWaitForFunctionTests.cs
@@ -32,7 +32,7 @@ await Page.WaitForFunctionAsync(@"() =>
         public async Task ShouldPollOnInterval()
         {
             var success = false;
-            var startTime = DateTime.Now;
+            var startTime = DateTime.UtcNow;
             var polling = 100;
             var watchdog = Page.WaitForFunctionAsync("() => window.__FOO === 'hit'", new WaitForFunctionOptions { PollingInterval = polling })
                 .ContinueWith(_ => success = true);
@@ -40,7 +40,7 @@ public async Task ShouldPollOnInterval()
             Assert.False(success);
             await Page.EvaluateExpressionAsync("document.body.appendChild(document.createElement('div'))");
             await watchdog;
-            Assert.True((DateTime.Now - startTime).TotalMilliseconds > polling / 2);
+            Assert.True((DateTime.UtcNow - startTime).TotalMilliseconds > polling / 2);
         }
         
         [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should poll on interval async")]
@@ -48,7 +48,7 @@ public async Task ShouldPollOnInterval()
         public async Task ShouldPollOnIntervalAsync()
         {
             var success = false;
-            var startTime = DateTime.Now;
+            var startTime = DateTime.UtcNow;
             var polling = 100;
             var watchdog = Page.WaitForFunctionAsync("async () => window.__FOO === 'hit'", new WaitForFunctionOptions { PollingInterval = polling })
                 .ContinueWith(_ => success = true);
@@ -56,7 +56,7 @@ public async Task ShouldPollOnIntervalAsync()
             Assert.False(success);
             await Page.EvaluateExpressionAsync("document.body.appendChild(document.createElement('div'))");
             await watchdog;
-            Assert.True((DateTime.Now - startTime).TotalMilliseconds > polling / 2);
+            Assert.True((DateTime.UtcNow - startTime).TotalMilliseconds > polling / 2);
         }
 
         [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should poll on mutation")]
diff --git a/lib/PuppeteerSharp.Tests/WaitTaskTests/FrameWaitForTimeoutTests.cs b/lib/PuppeteerSharp.Tests/WaitTaskTests/FrameWaitForTimeoutTests.cs
index 920b23a76..fbdbe41eb 100644
--- a/lib/PuppeteerSharp.Tests/WaitTaskTests/FrameWaitForTimeoutTests.cs
+++ b/lib/PuppeteerSharp.Tests/WaitTaskTests/FrameWaitForTimeoutTests.cs
@@ -19,10 +19,10 @@ public FrameWaitForTimeoutTests(ITestOutputHelper output) : base(output)
         public async Task WaitsForTheGivenTimeoutBeforeResolving()
         {
             await Page.GoToAsync(TestConstants.EmptyPage);
-            var startTime = DateTime.Now;
+            var startTime = DateTime.UtcNow;
             await Page.MainFrame.WaitForTimeoutAsync(1000);
-            Assert.True((DateTime.Now - startTime).TotalMilliseconds > 700);
-            Assert.True((DateTime.Now - startTime).TotalMilliseconds < 1300);
+            Assert.True((DateTime.UtcNow - startTime).TotalMilliseconds > 700);
+            Assert.True((DateTime.UtcNow - startTime).TotalMilliseconds < 1300);
         }
     }
 }
diff --git a/lib/PuppeteerSharp.Tests/WaitTaskTests/PageWaitForTests.cs b/lib/PuppeteerSharp.Tests/WaitTaskTests/PageWaitForTests.cs
index 4f803b4e9..5b3406e64 100644
--- a/lib/PuppeteerSharp.Tests/WaitTaskTests/PageWaitForTests.cs
+++ b/lib/PuppeteerSharp.Tests/WaitTaskTests/PageWaitForTests.cs
@@ -56,10 +56,10 @@ public async Task ShouldNotAllowYouToSelectAnElementWithSingleSlashXpath()
         [PuppeteerFact]
         public async Task ShouldTimeout()
         {
-            var startTime = DateTime.Now;
+            var startTime = DateTime.UtcNow;
             var timeout = 42;
             await Page.WaitForTimeoutAsync(timeout);
-            Assert.True((DateTime.Now - startTime).TotalMilliseconds > timeout / 2);
+            Assert.True((DateTime.UtcNow - startTime).TotalMilliseconds > timeout / 2);
         }
 
         [PuppeteerTest("waittask.spec.ts", "Page.waitFor", "should work with multiline body")]
diff --git a/lib/PuppeteerSharp.Tests/WaitTaskTests/PageWaitForTimeoutTests.cs b/lib/PuppeteerSharp.Tests/WaitTaskTests/PageWaitForTimeoutTests.cs
index 3764fc9a6..6993b6983 100644
--- a/lib/PuppeteerSharp.Tests/WaitTaskTests/PageWaitForTimeoutTests.cs
+++ b/lib/PuppeteerSharp.Tests/WaitTaskTests/PageWaitForTimeoutTests.cs
@@ -19,10 +19,10 @@ public PageWaitForTimeoutTests(ITestOutputHelper output) : base(output)
         public async Task WaitsForTheGivenTimeoutBeforeResolving()
         {
             await Page.GoToAsync(TestConstants.EmptyPage);
-            var startTime = DateTime.Now;
+            var startTime = DateTime.UtcNow;
             await Page.WaitForTimeoutAsync(1000);
-            Assert.True((DateTime.Now - startTime).TotalMilliseconds > 700);
-            Assert.True((DateTime.Now - startTime).TotalMilliseconds < 1300);
+            Assert.True((DateTime.UtcNow - startTime).TotalMilliseconds > 700);
+            Assert.True((DateTime.UtcNow - startTime).TotalMilliseconds < 1300);
         }
     }
 }