diff --git a/Octokit.Tests.Integration/Clients/IssuesClientTests.cs b/Octokit.Tests.Integration/Clients/IssuesClientTests.cs
index 41e2016d..dc562fb4 100644
--- a/Octokit.Tests.Integration/Clients/IssuesClientTests.cs
+++ b/Octokit.Tests.Integration/Clients/IssuesClientTests.cs
@@ -242,12 +242,12 @@ public class IssuesClientTests : IDisposable
     {
         var owner = _repository.Owner.Login;
 
-        AssertEx.Throws<ApiValidationException>(
-            () => _issuesClient.GetForRepository(owner, _repository.Name,
+        await AssertEx.Throws<ApiValidationException>(
+            async () => await _issuesClient.GetForRepository(owner, _repository.Name,
                 new RepositoryIssueRequest { Creator = "some-random-account" }));
 
-        AssertEx.Throws<ApiValidationException>(
-            () => _issuesClient.GetForRepository(owner, _repository.Name,
+        await AssertEx.Throws<ApiValidationException>(
+            async () => await _issuesClient.GetForRepository(owner, _repository.Name,
                 new RepositoryIssueRequest { Assignee = "some-random-account" }));
     }
 
diff --git a/Octokit.Tests/Clients/GistsClientTests.cs b/Octokit.Tests/Clients/GistsClientTests.cs
index 3a3d8769..69eb025c 100644
--- a/Octokit.Tests/Clients/GistsClientTests.cs
+++ b/Octokit.Tests/Clients/GistsClientTests.cs
@@ -163,8 +163,7 @@ public class GistsClientTests
             var connection = Substitute.For<IApiConnection>();
             var client = new GistsClient(connection);
 
-            AssertEx.Throws<ArgumentNullException>(async () => await
-                client.Delete(null));
+            Assert.Throws<ArgumentNullException>(() => client.Delete(null));
         }
     }
 
@@ -224,7 +223,7 @@ public class GistsClientTests
 
             var client = new GistsClient(apiConnection);
 
-            AssertEx.Throws<ApiException>(async () => await client.IsStarred("1"));
+            await AssertEx.Throws<ApiException>(async () => await client.IsStarred("1"));
         }
     }