diff --git a/test/UnitTests/Microsoft.Testing.Platform.UnitTests/Logging/FileLoggerTests.cs b/test/UnitTests/Microsoft.Testing.Platform.UnitTests/Logging/FileLoggerTests.cs
index b0adf713ee..13cf25ca5c 100644
--- a/test/UnitTests/Microsoft.Testing.Platform.UnitTests/Logging/FileLoggerTests.cs
+++ b/test/UnitTests/Microsoft.Testing.Platform.UnitTests/Logging/FileLoggerTests.cs
@@ -214,7 +214,7 @@ public async Task Log_WhenAsyncFlush_StreamWriterIsCalledOnlyWhenLogLevelAllowsI
                 await Task.Delay(100);
             }
 
-            Assert.AreEqual($"[00:00:00.000 Test - {currentLogLevel}] Message{Environment.NewLine}", Encoding.Default.GetString(_memoryStream.ToArray()));
+            Assert.AreEqual($"0001-01-01T00:00:00.0000000+00:00 Test {currentLogLevel.ToString().ToUpperInvariant()} Message{Environment.NewLine}", Encoding.Default.GetString(_memoryStream.ToArray()));
         }
         else
         {