diff --git a/FFMpegCore.Test/Resources/VideoLibrary.cs b/FFMpegCore.Test/Resources/VideoLibrary.cs
index b39d6d6..8bb0139 100644
--- a/FFMpegCore.Test/Resources/VideoLibrary.cs
+++ b/FFMpegCore.Test/Resources/VideoLibrary.cs
@@ -1,4 +1,5 @@
-using System.IO;
+using System;
+using System.IO;
 using FFMpegCore.Enums;
 
 namespace FFMpegCore.Test.Resources
@@ -44,7 +45,7 @@ public static string OutputLocation(this FileInfo file, string type, string keyw
             string originalLocation = file.Directory.FullName,
                 outputFile = file.Name.Replace(file.Extension, keyword + "." + type.ToLowerInvariant());
 
-            return $"{originalLocation}{Path.DirectorySeparatorChar}{outputFile}";
+            return $"{originalLocation}{Path.DirectorySeparatorChar}{Guid.NewGuid()}_{outputFile}";
         }
     }
 }
diff --git a/FFMpegCore.Test/VideoTest.cs b/FFMpegCore.Test/VideoTest.cs
index 65bcbc9..41899c6 100644
--- a/FFMpegCore.Test/VideoTest.cs
+++ b/FFMpegCore.Test/VideoTest.cs
@@ -566,7 +566,7 @@ public void Video_With_Only_Audio_Should_Extract_Metadata()
             var video = FFProbe.Analyse(VideoLibrary.LocalVideoAudioOnly.FullName);
             Assert.AreEqual(null, video.PrimaryVideoStream);
             Assert.AreEqual("aac", video.PrimaryAudioStream.CodecName);
-            Assert.AreEqual(3, video.Duration.TotalSeconds, 0.5);
+            Assert.AreEqual(10, video.Duration.TotalSeconds, 0.5);
             // Assert.AreEqual(1.25, video.Size);
         }
 
@@ -580,7 +580,7 @@ public void Video_Duration()
             {
                 FFMpegArguments
                     .FromFileInput(VideoLibrary.LocalVideo)
-                    .OutputToFile(output, false, opt => opt.WithDuration(TimeSpan.FromSeconds(video.Duration.TotalSeconds - 5)))
+                    .OutputToFile(output, false, opt => opt.WithDuration(TimeSpan.FromSeconds(video.Duration.TotalSeconds - 2)))
                     .ProcessSynchronously();
 
                 Assert.IsTrue(File.Exists(output));
@@ -589,7 +589,7 @@ public void Video_Duration()
                 Assert.AreEqual(video.Duration.Days, outputVideo.Duration.Days);
                 Assert.AreEqual(video.Duration.Hours, outputVideo.Duration.Hours);
                 Assert.AreEqual(video.Duration.Minutes, outputVideo.Duration.Minutes);
-                Assert.AreEqual(video.Duration.Seconds - 5, outputVideo.Duration.Seconds);
+                Assert.AreEqual(video.Duration.Seconds - 2, outputVideo.Duration.Seconds);
             }
             finally
             {