diff --git a/CHANGELOG.md b/CHANGELOG.md
index c531a49..8db234b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Features
+
+- Send events synchronously so they're not lost when the script exits ([#39](https://github.com/getsentry/sentry-powershell/pull/39))
+
 ## 0.0.2
 
 ### Various fixes & improvements
diff --git a/modules/Sentry/private/New-HttpTransport.ps1 b/modules/Sentry/private/New-HttpTransport.ps1
new file mode 100644
index 0000000..98022ce
--- /dev/null
+++ b/modules/Sentry/private/New-HttpTransport.ps1
@@ -0,0 +1,17 @@
+# Wrapper to expose Sentry.Internal.SdkComposer::CreateHttpTransport()
+function New-HttpTransport
+{
+    [OutputType([Sentry.Extensibility.ITransport])]
+    [CmdletBinding()]
+    param(
+        [Parameter(Mandatory)]
+        [Sentry.SentryOptions] $options
+    )
+
+    $assembly = [Sentry.SentrySdk].Assembly
+    $type = $assembly.GetType('Sentry.Internal.SdkComposer')
+    $composer = [Activator]::CreateInstance($type, @($options))
+
+    $method = $type.GetMethod('CreateHttpTransport', [System.Reflection.BindingFlags]::Instance + [System.Reflection.BindingFlags]::NonPublic + [System.Reflection.BindingFlags]::Public)
+    return $method.Invoke($composer, @())
+}
diff --git a/modules/Sentry/private/SynchronousWorker.ps1 b/modules/Sentry/private/SynchronousWorker.ps1
new file mode 100644
index 0000000..2938cf3
--- /dev/null
+++ b/modules/Sentry/private/SynchronousWorker.ps1
@@ -0,0 +1,42 @@
+. "$privateDir/New-HttpTransport.ps1"
+
+class SynchronousWorker : Sentry.Extensibility.IBackgroundWorker
+{
+    hidden [Sentry.Extensibility.ITransport] $transport
+    hidden [Sentry.SentryOptions] $options
+    hidden $unfinishedTasks = [System.Collections.Generic.List[System.Threading.Tasks.Task]]::new()
+
+    SynchronousWorker([Sentry.SentryOptions] $options)
+    {
+        $this.options = $options
+
+        # Start from either the transport given on options, or create a new HTTP transport.
+        $this.transport = $options.Transport;
+        if ($null -eq $this.transport)
+        {
+            $this.transport = New-HttpTransport($options)
+        }
+    }
+
+    [bool] EnqueueEnvelope([Sentry.Protocol.Envelopes.Envelope] $envelope)
+    {
+        $task = $this.transport.SendEnvelopeAsync($envelope, [System.Threading.CancellationToken]::None)
+        if (-not $task.Wait($this.options.FlushTimeout))
+        {
+            $this.unfinishedTasks.Add($task)
+        }
+        return $true
+    }
+
+    [System.Threading.Tasks.Task] FlushAsync([System.TimeSpan] $timeout)
+    {
+        [System.Threading.Tasks.Task]::WhenAll($this.unfinishedTasks).Wait($timeout)
+        $this.unfinishedTasks.Clear()
+        return [System.Threading.Tasks.Task]::CompletedTask
+    }
+
+    [int] get_QueuedItems()
+    {
+        return $this.unfinishedTasks.Count
+    }
+}
diff --git a/modules/Sentry/public/Start-Sentry.ps1 b/modules/Sentry/public/Start-Sentry.ps1
index b2b3609..6bb3149 100644
--- a/modules/Sentry/public/Start-Sentry.ps1
+++ b/modules/Sentry/public/Start-Sentry.ps1
@@ -1,5 +1,6 @@
 . "$privateDir/DiagnosticLogger.ps1"
 . "$privateDir/ScopeIntegration.ps1"
+. "$privateDir/SynchronousWorker.ps1"
 . "$privateDir/EventUpdater.ps1"
 
 function Start-Sentry
@@ -16,6 +17,8 @@ function Start-Sentry
     begin
     {
         $options = [Sentry.SentryOptions]::new()
+        $options.FlushTimeout = [System.TimeSpan]::FromSeconds(10)
+        $options.ShutDownTimeout = $options.FlushTimeout
         $options.ReportAssembliesMode = [Sentry.ReportAssembliesMode]::None
         $options.IsGlobalModeEnabled = $true
         [Sentry.sentryOptionsExtensions]::AddIntegration($options, [ScopeIntegration]::new())
@@ -42,7 +45,20 @@ function Start-Sentry
             $options | ForEach-Object $EditOptions
         }
 
-        $options.DiagnosticLogger = [DiagnosticLogger]::new($options.DiagnosticLevel)
+        $logger = [DiagnosticLogger]::new($options.DiagnosticLevel)
+        $options.DiagnosticLogger = $logger
+
+        if ($null -eq $options.BackgroundWorker)
+        {
+            try
+            {
+                $options.BackgroundWorker = [SynchronousWorker]::new($options)
+            }
+            catch
+            {
+                $logger.Log([Sentry.SentryLevel]::Warning, 'Failed to create a PowerShell-specific synchronous worker', $_.Exception, @())
+            }
+        }
 
         # Workaround for https://github.com/getsentry/sentry-dotnet/issues/3141
         [Sentry.SentryOptionsExtensions]::DisableAppDomainProcessExitFlush($options)
@@ -52,4 +68,3 @@ function Start-Sentry
         [Sentry.SentrySdk]::init($options) | Out-Null
     }
 }
-
diff --git a/tests/userfeedback.tests.ps1 b/tests/out-sentry.tests.ps1
similarity index 82%
rename from tests/userfeedback.tests.ps1
rename to tests/out-sentry.tests.ps1
index 6ce073a..3d061c4 100644
--- a/tests/userfeedback.tests.ps1
+++ b/tests/out-sentry.tests.ps1
@@ -2,7 +2,7 @@ BeforeAll {
     . "$PSScriptRoot/utils.ps1"
 }
 
-Describe 'UserFeedback' {
+Describe 'Out-Sentry' {
     BeforeEach {
         $events = [System.Collections.Generic.List[Sentry.SentryEvent]]::new();
         $transport = [RecordingTransport]::new()
@@ -15,13 +15,13 @@ Describe 'UserFeedback' {
         Stop-Sentry
     }
 
-    It 'Out-Sentry returns an event ID for messages' {
+    It 'returns an event ID for messages' {
         $eventId = 'msg' | Out-Sentry
         $eventId | Should -BeOfType [Sentry.SentryId]
         $eventId.ToString().Length | Should -Be 32
     }
 
-    It 'Out-Sentry returns an event ID for an error record' {
+    It 'returns an event ID for an error record' {
         try
         {
             throw 'error'
@@ -34,15 +34,13 @@ Describe 'UserFeedback' {
         $eventId.ToString().Length | Should -Be 32
     }
 
-    It 'Feedback gets captured' {
+    It 'captures feedback' {
         $eventId = 'msg' | Out-Sentry
 
         $eventId | Should -BeOfType [Sentry.SentryId]
-        [Sentry.SentrySdk]::Flush()
         $transport.Envelopes.Count | Should -Be 1
 
         [Sentry.SentrySdk]::CaptureUserFeedback($eventId, 'email@example.com', 'comments', 'name')
-        [Sentry.SentrySdk]::Flush()
         $transport.Envelopes.Count | Should -Be 2
         $envelopeItem = $transport.Envelopes.ToArray()[1].Items[0]
         $envelopeItem.Header['type'] | Should -Be 'user_report'
@@ -52,4 +50,9 @@ Describe 'UserFeedback' {
         $envelopeItem.Payload.Source.Comments | Should -Be 'comments'
     }
 
+    It 'sends synchronously' {
+        $eventId = 'msg' | Out-Sentry
+        $eventId | Should -Not -Be $null
+        $transport.Envelopes.Count | Should -Be 1
+    }
 }
diff --git a/tests/scope.tests.ps1 b/tests/scope.tests.ps1
index 76234a0..f4b797a 100644
--- a/tests/scope.tests.ps1
+++ b/tests/scope.tests.ps1
@@ -19,7 +19,6 @@ Describe 'Edit-SentryScope' {
             [Sentry.ScopeExtensions]::AddAttachment($_, $PSCommandPath)
         }
         'message' | Out-Sentry
-        [Sentry.SentrySdk]::Flush()
         $transport.Envelopes.Count | Should -Be 1
         [Sentry.Protocol.Envelopes.Envelope]$envelope = $transport.Envelopes.ToArray()[0]
         $envelope.Items.Count | Should -Be 2
@@ -32,7 +31,6 @@ Describe 'Edit-SentryScope' {
             [byte[]] $data = 1, 2, 3, 4, 5
             [Sentry.ScopeExtensions]::AddAttachment($_, $data, 'filename.bin')
         }
-        [Sentry.SentrySdk]::Flush()
         $transport.Envelopes.Count | Should -Be 1
         [Sentry.Protocol.Envelopes.Envelope]$envelope = $transport.Envelopes.ToArray()[0]
         $envelope.Items.Count | Should -Be 2
diff --git a/tests/utils.ps1 b/tests/utils.ps1
index a52bfa8..96afc6e 100644
--- a/tests/utils.ps1
+++ b/tests/utils.ps1
@@ -1,11 +1,11 @@
 class RecordingTransport:Sentry.Extensibility.ITransport
 {
-    $envelopes = [System.Collections.Concurrent.ConcurrentQueue[Sentry.Protocol.Envelopes.Envelope]]::new();
+    $envelopes = [System.Collections.Concurrent.ConcurrentQueue[Sentry.Protocol.Envelopes.Envelope]]::new()
 
     [System.Threading.Tasks.Task]SendEnvelopeAsync([Sentry.Protocol.Envelopes.Envelope] $envelope, [System.Threading.CancellationToken] $cancellationToken)
     {
-        $this.envelopes.Enqueue($envelope);
-        return [System.Threading.Tasks.Task]::CompletedTask;
+        $this.envelopes.Enqueue($envelope)
+        return [System.Threading.Tasks.Task]::CompletedTask
     }
 
     [void] Clear()
@@ -18,9 +18,9 @@ class TestLogger:Sentry.Infrastructure.DiagnosticLogger
 {
     TestLogger([Sentry.SentryLevel]$level) : base($level) {}
 
-    $entries = [System.Collections.Concurrent.ConcurrentQueue[string]]::new();
+    $entries = [System.Collections.Concurrent.ConcurrentQueue[string]]::new()
 
-    [void]LogMessage([string] $message) { $this.entries.Enqueue($message); }
+    [void]LogMessage([string] $message) { $this.entries.Enqueue($message) }
 }
 
 class TestIntegration : Sentry.Integrations.ISdkIntegration
@@ -45,7 +45,7 @@ function StartSentryForEventTests([ref] $events, [ref] $transport)
                 param([Sentry.SentryEvent]$e)
                 $events.Add($e)
                 return $e
-            });
+            })
 
         # If events are not sent, there's a client report sent at the end and it blocks the process for the default flush
         # timeout because it cannot connect to the server. Let's just replace the transport too.