diff --git a/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs b/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
index 7607b04..253659c 100644
--- a/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
+++ b/FFMpegCore.Test/FFMpegArgumentProcessorTest.cs
@@ -1,6 +1,5 @@
 using System.Reflection;
 using FFMpegCore.Arguments;
-using FluentAssertions;
 
 namespace FFMpegCore.Test;
 
@@ -26,11 +25,20 @@ public class FFMpegArgumentProcessorTest
     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);
+        try
+        {
+            GlobalFFOptions.Configure(new FFOptions { WorkingDirectory = globalWorkingDir });
+
+            var processor = CreateArgumentProcessor();
+            var options = processor.GetConfiguredOptions(null);
+
+            Assert.AreEqual(globalWorkingDir, options.WorkingDirectory);
+        }
+        finally
+        {
+            GlobalFFOptions.Configure(new FFOptions { WorkingDirectory = string.Empty });
+        }
     }
 
     [TestMethod]
@@ -42,7 +50,7 @@ public class FFMpegArgumentProcessorTest
         processor.Configure(options => options.WorkingDirectory = sessionWorkingDir);
         var options = processor.GetConfiguredOptions(null);
 
-        options.WorkingDirectory.Should().Be(sessionWorkingDir);
+        Assert.AreEqual(sessionWorkingDir, options.WorkingDirectory);
     }
 
     [TestMethod]
@@ -51,17 +59,24 @@ public class FFMpegArgumentProcessorTest
         var globalConfig = "Whatever";
         GlobalFFOptions.Configure(new FFOptions { WorkingDirectory = globalConfig, TemporaryFilesFolder = globalConfig, BinaryFolder = globalConfig });
 
-        var processor = CreateArgumentProcessor();
+        try
+        {
+            var processor = CreateArgumentProcessor();
 
-        var sessionTempDir = "./CurrentRunWorkingDir";
-        processor.Configure(options => options.TemporaryFilesFolder = sessionTempDir);
+            var sessionTempDir = "./CurrentRunWorkingDir";
+            processor.Configure(options => options.TemporaryFilesFolder = sessionTempDir);
 
-        var overrideOptions = new FFOptions { WorkingDirectory = "override" };
-        var options = processor.GetConfiguredOptions(overrideOptions);
+            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);
+            Assert.AreSame(options, overrideOptions);
+            Assert.AreEqual(sessionTempDir, options.TemporaryFilesFolder);
+            Assert.AreNotEqual(globalConfig, options.BinaryFolder);
+        }
+        finally
+        {
+            GlobalFFOptions.Configure(new FFOptions { WorkingDirectory = string.Empty });
+        }
     }
 
     [TestMethod]
@@ -74,31 +89,31 @@ public class FFMpegArgumentProcessorTest
         var sessionWorkingDir = "./CurrentRunWorkingDir";
         processor1.Configure(options => options.WorkingDirectory = sessionWorkingDir);
         var options1 = processor1.GetConfiguredOptions(null);
-        options1.WorkingDirectory.Should().Be(sessionWorkingDir);
+        Assert.AreEqual(sessionWorkingDir, options1.WorkingDirectory);
 
         var processor2 = CreateArgumentProcessor();
         var options2 = processor2.GetConfiguredOptions(null);
-        options2.WorkingDirectory.Should().Be(globalWorkingDir);
+        Assert.AreEqual(globalWorkingDir, options2.WorkingDirectory);
     }
 
     [TestMethod]
     public void Concat_Escape()
     {
-        var arg = new DemuxConcatArgument(new[] { @"Heaven's River\05 - Investigation.m4b" });
-        arg.Values.Should().BeEquivalentTo(@"file 'Heaven'\''s River\05 - Investigation.m4b'");
+        var arg = new DemuxConcatArgument([@"Heaven's River\05 - Investigation.m4b"]);
+        CollectionAssert.AreEquivalent(new[] { @"file 'Heaven'\''s River\05 - Investigation.m4b'" }, arg.Values.ToArray());
     }
 
     [TestMethod]
     public void Audible_Aaxc_Test()
     {
         var arg = new AudibleEncryptionKeyArgument("123", "456");
-        arg.Text.Should().Be("-audible_key 123 -audible_iv 456");
+        Assert.AreEqual("-audible_key 123 -audible_iv 456", arg.Text);
     }
 
     [TestMethod]
     public void Audible_Aax_Test()
     {
         var arg = new AudibleEncryptionKeyArgument("62689101");
-        arg.Text.Should().Be("-activation_bytes 62689101");
+        Assert.AreEqual("-activation_bytes 62689101", arg.Text);
     }
 }
diff --git a/FFMpegCore.Test/FFMpegCore.Test.csproj b/FFMpegCore.Test/FFMpegCore.Test.csproj
index cc839aa..a4061ed 100644
--- a/FFMpegCore.Test/FFMpegCore.Test.csproj
+++ b/FFMpegCore.Test/FFMpegCore.Test.csproj
@@ -12,7 +12,6 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="FluentAssertions" Version="8.7.1"/>
     <PackageReference Include="GitHubActionsTestLogger" Version="2.4.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>