diff --git a/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs b/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
new file mode 100644
index 0000000..08de91c
--- /dev/null
+++ b/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
@@ -0,0 +1,84 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using FluentAssertions;
+
+namespace FFMpegCore.Test
+{
+    [TestClass]
+    public class FFMpegArgumentProcessorTest
+    {
+
+        private static FFMpegArgumentProcessor CreateArgumentProcessor() => FFMpegArguments
+                        .FromFileInput("")
+                        .OutputToFile("");
+
+
+        [TestMethod]
+        public void Processor_GlobalOptions_GetUsed()
+        {
+
+            var globalWorkingDir = "Whatever";
+            GlobalFFOptions.Configure(new FFOptions { WorkingDirectory = globalWorkingDir });
+
+            var processor = CreateArgumentProcessor();
+            var options2 = processor.GetConfiguredOptions(null);
+            options2.WorkingDirectory.Should().Be(globalWorkingDir);
+        }
+
+        [TestMethod]
+        public void Processor_SessionOptions_GetUsed()
+        {
+
+            var sessionWorkingDir = "./CurrentRunWorkingDir";
+
+            var processor = CreateArgumentProcessor();
+            processor.Configure(options => options.WorkingDirectory = sessionWorkingDir);
+            var options = processor.GetConfiguredOptions(null);
+
+            options.WorkingDirectory.Should().Be(sessionWorkingDir);
+        }
+
+
+        [TestMethod]
+        public void Processor_Options_CanBeOverridden_And_Configured()
+        {
+            var globalConfig = "Whatever";
+            GlobalFFOptions.Configure(new FFOptions { WorkingDirectory = globalConfig, TemporaryFilesFolder = globalConfig, BinaryFolder = globalConfig });
+
+
+            var processor = CreateArgumentProcessor();
+
+            var sessionTempDir = "./CurrentRunWorkingDir";
+            processor.Configure(options => options.TemporaryFilesFolder = sessionTempDir);
+
+            var overrideOptions = new FFOptions() { WorkingDirectory = "override" };
+            var options = processor.GetConfiguredOptions(overrideOptions);
+
+            options.Should().BeEquivalentTo(overrideOptions);
+            options.TemporaryFilesFolder.Should().BeEquivalentTo(sessionTempDir);
+            options.BinaryFolder.Should().NotBeEquivalentTo(globalConfig);
+        }
+
+
+        [TestMethod]
+        public void Options_Global_And_Session_Options_Can_Differ()
+        {
+            FFMpegArgumentProcessor CreateArgumentProcessor() => FFMpegArguments
+                .FromFileInput("")
+                .OutputToFile("");
+
+            var globalWorkingDir = "Whatever";
+            GlobalFFOptions.Configure(new FFOptions { WorkingDirectory = globalWorkingDir });
+
+            var processor1 = CreateArgumentProcessor();
+            var sessionWorkingDir = "./CurrentRunWorkingDir";
+            processor1.Configure(options => options.WorkingDirectory = sessionWorkingDir);
+            var options1 = processor1.GetConfiguredOptions(null);
+            options1.WorkingDirectory.Should().Be(sessionWorkingDir);
+
+
+            var processor2 = CreateArgumentProcessor();
+            var options2 = processor2.GetConfiguredOptions(null);
+            options2.WorkingDirectory.Should().Be(globalWorkingDir);
+        }
+    }
+}
\ No newline at end of file
diff --git a/FFMpegCore.Test/FFMpegCore.Test.csproj b/FFMpegCore.Test/FFMpegCore.Test.csproj
index e6831e6..6388724 100644
--- a/FFMpegCore.Test/FFMpegCore.Test.csproj
+++ b/FFMpegCore.Test/FFMpegCore.Test.csproj
@@ -39,6 +39,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="6.2.0" />
     <PackageReference Include="GitHubActionsTestLogger" Version="1.2.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.11.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="2.2.7" />
diff --git a/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs b/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs
index 209cc36..fdbdcc8 100644
--- a/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs
+++ b/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs
@@ -172,7 +172,7 @@ private bool HandleCompletion(bool throwOnError, int exitCode, IReadOnlyList<str
             return exitCode == 0;
         }
 
-        private FFOptions GetConfiguredOptions(FFOptions? ffOptions)
+        internal FFOptions GetConfiguredOptions(FFOptions? ffOptions)
         {
             var options = ffOptions ?? GlobalFFOptions.Current.Clone();
 
@@ -206,7 +206,7 @@ private Instance PrepareInstance(FFOptions ffOptions,
             return instance;
         }
 
-        
+
         private static bool HandleException(bool throwOnError, Exception e, IReadOnlyList<string> errorData)
         {
             if (!throwOnError)