diff --git a/Bugsnag.NET.Tests/Bugsnag.NET.Tests.csproj b/Bugsnag.NET.Tests/Bugsnag.NET.Tests.csproj
index 17a4214..4d99574 100755
--- a/Bugsnag.NET.Tests/Bugsnag.NET.Tests.csproj
+++ b/Bugsnag.NET.Tests/Bugsnag.NET.Tests.csproj
@@ -54,10 +54,8 @@
     <Compile Include="ExceptionExtensionTests.cs" />
     <Compile Include="Integration\IntegrationTests.PCL.cs" />
     <Compile Include="Integration\Utils\InstanceApproachApp.cs" />
-    <Compile Include="Integration\Utils\InstanceApproachAsyncApp.cs" />
     <Compile Include="Integration\Utils\ITestApp.cs" />
     <Compile Include="Integration\Utils\StaticApproachApp.cs" />
-    <Compile Include="Integration\Utils\StaticApproachAsyncApp.cs" />
     <Compile Include="Integration\Utils\Utils.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Integration\IntegrationTests.NET.cs" />
diff --git a/Bugsnag.NET.Tests/Integration/IntegrationTests.NET.cs b/Bugsnag.NET.Tests/Integration/IntegrationTests.NET.cs
index 60e28fc..2bd5cdd 100755
--- a/Bugsnag.NET.Tests/Integration/IntegrationTests.NET.cs
+++ b/Bugsnag.NET.Tests/Integration/IntegrationTests.NET.cs
@@ -20,12 +20,6 @@ public void SendError_StaticApproach()
             Utils.Run(StaticApproach.TestApp);
         }
 
-        [Test]
-        public async Task SendError_StaticApproachAsync()
-        {
-            await Utils.Run(StaticApproach.AsyncTestApp);
-        }
-
         [Test]
         public void SendError_InstanceApproach()
         {
@@ -34,14 +28,6 @@ public void SendError_InstanceApproach()
             );
         }
 
-        [Test]
-        public async Task SendError_InstanceApproachAsync()
-        {
-            await Utils.Run(
-                _instanceApproach.AsyncTestApp(snagger => snagger.ErrorAsync)
-            );
-        }
-
         [Test]
         public void SendWarning_InstanceApproach()
         {
@@ -50,14 +36,6 @@ public void SendWarning_InstanceApproach()
             );
         }
 
-        [Test]
-        public async Task SendWarning_InstanceApproachAsync()
-        {
-            await Utils.Run(
-                _instanceApproach.AsyncTestApp(snagger => snagger.WarningAsync)
-            );
-        }
-
         [Test]
         public void SendInfo_InstanceApproach()
         {
@@ -66,14 +44,6 @@ public void SendInfo_InstanceApproach()
             );
         }
 
-        [Test]
-        public async Task SendInfo_InstanceApproachAsync()
-        {
-            await Utils.Run(
-                _instanceApproach.AsyncTestApp(snagger => snagger.InfoAsync)
-            );
-        }
-
         static InstanceApproach _instanceApproach = new InstanceApproach(_GetSnagger);
 
         static IBugsnagger _GetSnagger() => new BsNET.Bugsnagger
@@ -93,11 +63,6 @@ class StaticApproach
                 _SetApp,
                 _OnUnhandledException
             );
-            public static IAsyncTestApp AsyncTestApp { get; } = new StaticApproachAsyncApp(
-                _SetApiKey,
-                _SetApp,
-                _OnUnhandledExceptionAsync
-            );
 
             static void _SetApiKey(string key) => BsNET.Bugsnag.ApiKey = key;
             static void _SetApp() => BsNET.Bugsnag.App = new App
@@ -112,13 +77,6 @@ static void _OnUnhandledException(Exception ex)
 
                 client.Notify(@event);
             }
-            static Task _OnUnhandledExceptionAsync(Exception ex)
-            {
-                var client = BsNET.Bugsnag.Error;
-                var @event = client.GetEvent(ex, null, _GetMetadata());
-
-                return client.NotifyAsync(@event);
-            }
 
             static object _GetMetadata() =>
                 new
diff --git a/Bugsnag.NET.Tests/Integration/IntegrationTests.PCL.cs b/Bugsnag.NET.Tests/Integration/IntegrationTests.PCL.cs
index fcd745e..6fc21ff 100755
--- a/Bugsnag.NET.Tests/Integration/IntegrationTests.PCL.cs
+++ b/Bugsnag.NET.Tests/Integration/IntegrationTests.PCL.cs
@@ -19,12 +19,6 @@ public void SendError_StaticApproach()
             Utils.Run(StaticApproach.TestApp);
         }
 
-        [Test]
-        public async Task SendError_StaticApproachAsync()
-        {
-            await Utils.Run(StaticApproach.AsyncTestApp);
-        }
-
         [Test]
         public void SendError_InstanceApproach()
         {
@@ -33,14 +27,6 @@ public void SendError_InstanceApproach()
             );
         }
 
-        [Test]
-        public async Task SendError_InstanceApproachAsync()
-        {
-            await Utils.Run(
-                _instanceApproach.AsyncTestApp(snagger => snagger.ErrorAsync)
-            );
-        }
-
         [Test]
         public void SendWarning_InstanceApproach()
         {
@@ -49,14 +35,6 @@ public void SendWarning_InstanceApproach()
             );
         }
 
-        [Test]
-        public async Task SendWarning_InstanceApproachAsync()
-        {
-            await Utils.Run(
-                _instanceApproach.AsyncTestApp(snagger => snagger.WarningAsync)
-            );
-        }
-
         [Test]
         public void SendInfo_InstanceApproach()
         {
@@ -65,14 +43,6 @@ public void SendInfo_InstanceApproach()
             );
         }
 
-        [Test]
-        public async Task SendInfo_InstanceApproachAsync()
-        {
-            await Utils.Run(
-                _instanceApproach.AsyncTestApp(snagger => snagger.InfoAsync)
-            );
-        }
-
         static InstanceApproach _instanceApproach = new InstanceApproach(_GetSnagger);
 
         static IBugsnagger _GetSnagger() => new BsPCL.Bugsnagger
@@ -92,11 +62,6 @@ class StaticApproach
                 _SetApp,
                 _OnUnhandledException
             );
-            public static IAsyncTestApp AsyncTestApp { get; } = new StaticApproachAsyncApp(
-                _SetApiKey,
-                _SetApp,
-                _OnUnhandledExceptionAsync
-            );
 
             static void _SetApiKey(string key) => BsPCL.Bugsnag.ApiKey = key;
             static void _SetApp() => BsPCL.Bugsnag.App = new App
@@ -111,13 +76,6 @@ static void _OnUnhandledException(Exception ex)
 
                 client.Notify(@event);
             }
-            static Task _OnUnhandledExceptionAsync(Exception ex)
-            {
-                var client = BsPCL.Bugsnag.Error;
-                var @event = client.GetEvent(ex, null, _GetMetadata());
-
-                return client.NotifyAsync(@event);
-            }
 
             static object _GetMetadata() =>
                 new
diff --git a/Bugsnag.NET.Tests/Integration/Utils/ITestApp.cs b/Bugsnag.NET.Tests/Integration/Utils/ITestApp.cs
index 3fd98d0..78802db 100755
--- a/Bugsnag.NET.Tests/Integration/Utils/ITestApp.cs
+++ b/Bugsnag.NET.Tests/Integration/Utils/ITestApp.cs
@@ -10,9 +10,4 @@ interface ITestApp
     {
         void Run(string testInfo);
     }
-
-    interface IAsyncTestApp
-    {
-        Task Run(string testInfo);
-    }
 }
diff --git a/Bugsnag.NET.Tests/Integration/Utils/InstanceApproachAsyncApp.cs b/Bugsnag.NET.Tests/Integration/Utils/InstanceApproachAsyncApp.cs
deleted file mode 100755
index 038f57f..0000000
--- a/Bugsnag.NET.Tests/Integration/Utils/InstanceApproachAsyncApp.cs
+++ /dev/null
@@ -1,40 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Bugsnag.Common;
-
-namespace Bugsnag.Tests.Integration
-{
-    class InstanceApproachAsyncApp : IAsyncTestApp
-    {
-        public InstanceApproachAsyncApp(
-            IBugsnagger snagger,
-            Func<IBugsnagger, Exception, Task> notifyAsync)
-        {
-            _snagger = snagger;
-            _notifyAsync = notifyAsync;
-        }
-
-        readonly IBugsnagger _snagger;
-
-        readonly Func<IBugsnagger, Exception, Task> _notifyAsync;
-
-        public async Task Run(string testInfo)
-        {
-            try
-            {
-                // Main bulk of app code would go here
-
-                Utils.TriggerError(testInfo);
-            }
-            catch (Exception ex)
-            {
-                await _OnUnhandledException(ex);
-            }
-        }
-
-        Task _OnUnhandledException(Exception ex) => _notifyAsync(_snagger, ex);
-    }
-}
diff --git a/Bugsnag.NET.Tests/Integration/Utils/StaticApproachAsyncApp.cs b/Bugsnag.NET.Tests/Integration/Utils/StaticApproachAsyncApp.cs
deleted file mode 100755
index e2539c7..0000000
--- a/Bugsnag.NET.Tests/Integration/Utils/StaticApproachAsyncApp.cs
+++ /dev/null
@@ -1,45 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Bugsnag.Tests.Integration
-{
-    class StaticApproachAsyncApp : IAsyncTestApp
-    {
-        public StaticApproachAsyncApp(
-            Action<string> setApiKey,
-            Action setApp,
-            Func<Exception, Task> onUnhandledException)
-        {
-            _setApiKey = setApiKey;
-            _setApp = setApp;
-            _onUnhandledException = onUnhandledException;
-        }
-
-        readonly Action<string> _setApiKey;
-        readonly Action _setApp;
-        readonly Func<Exception, Task> _onUnhandledException;
-
-        void _InitBugsnag()
-        {
-            _setApiKey(Utils.ReadApiKey());
-            _setApp();
-        }
-
-        public async Task Run(string testInfo)
-        {
-            _InitBugsnag();
-
-            try
-            {
-                Utils.TriggerError(testInfo);
-            }
-            catch (Exception ex)
-            {
-                await _onUnhandledException(ex);
-            }
-        }
-    }
-}
diff --git a/Bugsnag.NET.Tests/Integration/Utils/Utils.cs b/Bugsnag.NET.Tests/Integration/Utils/Utils.cs
index 467a3c3..4abf2d9 100755
--- a/Bugsnag.NET.Tests/Integration/Utils/Utils.cs
+++ b/Bugsnag.NET.Tests/Integration/Utils/Utils.cs
@@ -28,20 +28,6 @@ internal static void Run(
             Inconclusive();
         }
 
-        internal static async Task Run(
-            IAsyncTestApp app,
-            [CallerMemberName] string callerName = "[unknown test]",
-            [CallerFilePath] string sourceFilePath = "[unknown file]",
-            [CallerLineNumber] int sourceLineNumber = 0)
-        {
-            var fileHint = $"{sourceFilePath}:{sourceLineNumber}";
-
-            await app.Run($"{callerName} ({sourceFilePath}:{sourceLineNumber})");
-
-            Inconclusive();
-        }
-
-
         public static void TriggerError(string testInfo)
         {
             throw new ApplicationException($"Error triggered by {testInfo}");
@@ -84,16 +70,6 @@ public ITestApp TestApp(Func<IBugsnagger, Action<Exception, IUser, object>> getN
             return TestApp((snagger, ex) => getNotify(snagger)(ex, null, _GetMetadata()));
         }
 
-        public IAsyncTestApp AsyncTestApp(Func<IBugsnagger, Exception, Task> notifyAsync)
-        {
-            return new InstanceApproachAsyncApp(_getSnagger(), notifyAsync);
-        }
-
-        public IAsyncTestApp AsyncTestApp(Func<IBugsnagger, Func<Exception, IUser, object, Task>> getNotify)
-        {
-            return AsyncTestApp((snagger, ex) => getNotify(snagger)(ex, null, _GetMetadata()));
-        }
-
         object _GetMetadata() =>
             new
             {
diff --git a/Bugsnag.NET/Bugsnag.cs b/Bugsnag.NET/Bugsnag.cs
index 26eaa8c..7ccbd65 100755
--- a/Bugsnag.NET/Bugsnag.cs
+++ b/Bugsnag.NET/Bugsnag.cs
@@ -43,11 +43,6 @@ private Bugsnag(Severity severity)
         public void Notify(IEnumerable<IEvent> events) => Snagger.Notify(events);
         public void Notify(IEnumerable<IEvent> events, bool useSSL) => Snagger.Notify(events, useSSL);
 
-        public Task<HttpResponseMessage> NotifyAsync(IEvent evt) => Snagger.NotifyAsync(evt);
-        public Task<HttpResponseMessage> NotifyAsync(IEvent evt, bool useSSL) => Snagger.NotifyAsync(evt, useSSL);
-        public Task<HttpResponseMessage> NotifyAsync(IEnumerable<IEvent> events) => Snagger.NotifyAsync(events);
-        public Task<HttpResponseMessage> NotifyAsync(IEnumerable<IEvent> events, bool useSSL) => Snagger.NotifyAsync(events, useSSL);
-
         public IEvent GetEvent(Exception ex, IUser user, object metaData)
         {
             return new Event(ex, Snagger.FinalizeStacktraceLine)
diff --git a/Bugsnag.NET/Bugsnagger.cs b/Bugsnag.NET/Bugsnagger.cs
index ef32f1e..8419cca 100755
--- a/Bugsnag.NET/Bugsnagger.cs
+++ b/Bugsnag.NET/Bugsnagger.cs
@@ -21,49 +21,6 @@ public class Bugsnagger : IBugsnagger
         public Func<IMutableStackTraceLine, IStackTraceLine> FinalizeStacktraceLine { get; set; } = x => x;
         public Func<IMutableEvent, Exception, IEvent> FinalizeEvent { get; set; } = (@event, ex) => @event;
 
-        [Obsolete("Has not been verified to work yet")]
-        public Task<HttpResponseMessage> ErrorAsync(Exception ex, IUser user, object metadata)
-        {
-            var @event = this.CreateEvent(Severity.Error, ex, user, metadata);
-
-            return NotifyAsync(@event);
-        }
-
-        [Obsolete("Has not been verified to work yet")]
-        public Task<HttpResponseMessage> WarningAsync(Exception ex, IUser user, object metadata)
-        {
-            var @event = this.CreateEvent(Severity.Warning, ex, user, metadata);
-
-            return NotifyAsync(@event);
-        }
-
-        [Obsolete("Has not been verified to work yet")]
-        public Task<HttpResponseMessage> InfoAsync(Exception ex, IUser user, object metadata)
-        {
-            var @event = this.CreateEvent(Severity.Info, ex, user, metadata);
-
-            return NotifyAsync(@event);
-        }
-
-        [Obsolete("Has not been verified to work yet")]
-        public Task<HttpResponseMessage> NotifyAsync(IEvent @event) => NotifyAsync(@event, true);
-
-        [Obsolete("Has not been verified to work yet")]
-        public Task<HttpResponseMessage> NotifyAsync(IEvent @event, bool useSSL) =>
-            NotifyAsync(new[] { @event }, useSSL);
-
-        [Obsolete("Has not been verified to work yet")]
-        public Task<HttpResponseMessage> NotifyAsync(IEnumerable<IEvent> events) => NotifyAsync(events, true);
-
-        [Obsolete("Has not been verified to work yet")]
-        public Task<HttpResponseMessage> NotifyAsync(IEnumerable<IEvent> events, bool useSSL)
-        {
-            var notice = new Notice(ApiKey, Notifier, events);
-
-            return _Client.SendAsync(notice, useSSL);
-        }
-
-        [Obsolete("Prefer ErrorAsync")]
         public void Error(Exception ex, IUser user, object metadata)
         {
             var @event = this.CreateEvent(Severity.Error, ex, user, metadata);
@@ -71,7 +28,6 @@ public void Error(Exception ex, IUser user, object metadata)
             Notify(@event);
         }
 
-        [Obsolete("Prefer WarningAsync")]
         public void Warning(Exception ex, IUser user, object metadata)
         {
             var @event = this.CreateEvent(Severity.Warning, ex, user, metadata);
@@ -79,7 +35,6 @@ public void Warning(Exception ex, IUser user, object metadata)
             Notify(@event);
         }
 
-        [Obsolete("Prefer InfoAsync")]
         public void Info(Exception ex, IUser user, object metadata)
         {
             var @event = this.CreateEvent(Severity.Info, ex, user, metadata);
@@ -87,17 +42,13 @@ public void Info(Exception ex, IUser user, object metadata)
             Notify(@event);
         }
 
-        [Obsolete("Prefer NotifyAsync")]
         public void Notify(IEvent @event) => Notify(@event, true);
 
-        [Obsolete("Prefer NotifyAsync")]
         public void Notify(IEvent @event, bool useHttps) =>
             Notify(new[] { @event }, useHttps);
 
-        [Obsolete("Prefer NotifyAsync")]
         public void Notify(IEnumerable<IEvent> events) => Notify(events, true);
 
-        [Obsolete("Prefer NotifyAsync")]
         public void Notify(IEnumerable<IEvent> events, bool useHttps)
         {
             var notice = new Notice(ApiKey, Notifier, events);
diff --git a/Bugsnag.PCL/Bugsnag.cs b/Bugsnag.PCL/Bugsnag.cs
index 498b3cc..1b309de 100644
--- a/Bugsnag.PCL/Bugsnag.cs
+++ b/Bugsnag.PCL/Bugsnag.cs
@@ -44,11 +44,6 @@ private Bugsnag(Severity severity)
         public void Notify(IEnumerable<IEvent> events) => Snagger.Notify(events);
         public void Notify(IEnumerable<IEvent> events, bool useSSL) => Snagger.Notify(events, useSSL);
 
-        public Task<HttpResponseMessage> NotifyAsync(IEvent evt) => Snagger.NotifyAsync(evt);
-        public Task<HttpResponseMessage> NotifyAsync(IEvent evt, bool useSSL) => Snagger.NotifyAsync(evt, useSSL);
-        public Task<HttpResponseMessage> NotifyAsync(IEnumerable<IEvent> events) => Snagger.NotifyAsync(events);
-        public Task<HttpResponseMessage> NotifyAsync(IEnumerable<IEvent> events, bool useSSL) => Snagger.NotifyAsync(events, useSSL);
-
         public IEvent GetEvent(Exception ex, IUser user, object metaData)
         {
             return GetEvent(ex, user, null, metaData);
diff --git a/Bugsnag.PCL/Bugsnagger.cs b/Bugsnag.PCL/Bugsnagger.cs
index a45f8bc..019ed8b 100755
--- a/Bugsnag.PCL/Bugsnagger.cs
+++ b/Bugsnag.PCL/Bugsnagger.cs
@@ -21,44 +21,6 @@ public class Bugsnagger : IBugsnagger
         public Func<IMutableStackTraceLine, IStackTraceLine> FinalizeStacktraceLine { get; set; } = x => x;
         public Func<IMutableEvent, Exception, IEvent> FinalizeEvent { get; set; } = (@event, ex) => @event;
 
-        public Task<HttpResponseMessage> ErrorAsync(Exception ex, IUser user, object metadata)
-        {
-            var @event = this.CreateEvent(Severity.Error, ex, user, metadata);
-
-            return NotifyAsync(@event);
-        }
-
-        public Task<HttpResponseMessage> WarningAsync(Exception ex, IUser user, object metadata)
-        {
-            var @event = this.CreateEvent(Severity.Warning, ex, user, metadata);
-
-            return NotifyAsync(@event);
-        }
-
-        public Task<HttpResponseMessage> InfoAsync(Exception ex, IUser user, object metadata)
-        {
-            var @event = this.CreateEvent(Severity.Info, ex, user, metadata);
-
-            return NotifyAsync(@event);
-        }
-
-        public Task<HttpResponseMessage> NotifyAsync(IEvent @event) =>
-            NotifyAsync(@event, true);
-
-        public Task<HttpResponseMessage> NotifyAsync(IEvent @event, bool useSSL) =>
-            NotifyAsync(new[] { @event }, useSSL);
-
-        public Task<HttpResponseMessage> NotifyAsync(IEnumerable<IEvent> events) =>
-            NotifyAsync(events, true);
-
-        public Task<HttpResponseMessage> NotifyAsync(IEnumerable<IEvent> events, bool useSSL)
-        {
-            var notice = new Notice(ApiKey, Notifier, events);
-
-            return _Client.SendAsync(notice, useSSL);
-        }
-
-        [Obsolete("Prefer ErrorAsync")]
         public void Error(Exception ex, IUser user, object metadata)
         {
             var @event = this.CreateEvent(Severity.Error, ex, user, metadata);
@@ -66,7 +28,6 @@ public void Error(Exception ex, IUser user, object metadata)
             Notify(@event);
         }
 
-        [Obsolete("Prefer WarningAsync")]
         public void Warning(Exception ex, IUser user, object metadata)
         {
             var @event = this.CreateEvent(Severity.Warning, ex, user, metadata);
@@ -74,7 +35,6 @@ public void Warning(Exception ex, IUser user, object metadata)
             Notify(@event);
         }
 
-        [Obsolete("Prefer InfoAsync")]
         public void Info(Exception ex, IUser user, object metadata)
         {
             var @event = this.CreateEvent(Severity.Info, ex, user, metadata);
@@ -82,16 +42,12 @@ public void Info(Exception ex, IUser user, object metadata)
             Notify(@event);
         }
 
-        [Obsolete("Prefer NotifyAsync")]
         public void Notify(IEvent @event) => Notify(@event, true);
 
-        [Obsolete("Prefer NotifyAsync")]
         public void Notify(IEvent @event, bool useHttps) => Notify(new[] { @event }, useHttps);
 
-        [Obsolete("Prefer NotifyAsync")]
         public void Notify(IEnumerable<IEvent> events) => Notify(events, true);
 
-        [Obsolete("Prefer NotifyAsync")]
         public void Notify(IEnumerable<IEvent> events, bool useSSL)
         {
             var notice = new Notice(ApiKey, Notifier, events);
diff --git a/lib/Bugsnag.Common/Interfaces/IBugsnagger.cs b/lib/Bugsnag.Common/Interfaces/IBugsnagger.cs
index 2d34693..b2626af 100755
--- a/lib/Bugsnag.Common/Interfaces/IBugsnagger.cs
+++ b/lib/Bugsnag.Common/Interfaces/IBugsnagger.cs
@@ -22,18 +22,9 @@ public interface IBugsnagger
         void Warning(Exception ex, IUser user, object metadata);
         void Info(Exception ex, IUser user, object metadata);
 
-        Task<HttpResponseMessage> ErrorAsync(Exception ex, IUser user, object metadata);
-        Task<HttpResponseMessage> WarningAsync(Exception ex, IUser user, object metadata);
-        Task<HttpResponseMessage> InfoAsync(Exception ex, IUser user, object metadata);
-
         void Notify(IEvent @event);
         void Notify(IEvent @event, bool useHttps);
         void Notify(IEnumerable<IEvent> events);
         void Notify(IEnumerable<IEvent> events, bool useHttps);
-
-        Task<HttpResponseMessage> NotifyAsync(IEvent @event);
-        Task<HttpResponseMessage> NotifyAsync(IEvent @event, bool useSSL);
-        Task<HttpResponseMessage> NotifyAsync(IEnumerable<IEvent> events);
-        Task<HttpResponseMessage> NotifyAsync(IEnumerable<IEvent> events, bool useSSL);
     }
 }