diff --git a/Source/ExcelRna.Extensions.Logging.Tests/LogDisplayLoggerTests.cs b/Source/ExcelRna.Extensions.Logging.Tests/LogDisplayLoggerTests.cs
index f841b0a..52482c6 100644
--- a/Source/ExcelRna.Extensions.Logging.Tests/LogDisplayLoggerTests.cs
+++ b/Source/ExcelRna.Extensions.Logging.Tests/LogDisplayLoggerTests.cs
@@ -102,7 +102,7 @@ public void Log_includes_timestamp()
         // ARRANGE
         var logger = new LogDisplayLogger("Test", new LogDisplayLoggerOptions
         {
-            TimestampFormat = "yyyy-MM-dd HH:mm:ss ",
+            TimestampFormat = "yyyy-MM-dd HH:mm:ss",
         })
         {
             RecordLine = Mock.Of<Action<string, object[]>>(),
@@ -158,17 +158,4 @@ public void Log_does_not_show_LogDisplay(LogLevel level)
         // ASSERT
         Mock.Get(logger.Show).Verify(invoke => invoke(), Times.Never);
     }
-
-    [Fact]
-    public void Log_throws_when_logLevel_is_wrong()
-    {
-        // ARRANGE
-        var logger = new LogDisplayLogger("Test");
-
-        // ACT & ASSERT
-        Assert.Throws<ArgumentOutOfRangeException>(() =>
-        {
-            logger.Log((LogLevel)100, new Exception("TestException"), "TestMessage");
-        });
-    }
 }
diff --git a/Source/ExcelRna.Extensions.Logging/LogDisplayLogger.cs b/Source/ExcelRna.Extensions.Logging/LogDisplayLogger.cs
index d4b692d..af00617 100644
--- a/Source/ExcelRna.Extensions.Logging/LogDisplayLogger.cs
+++ b/Source/ExcelRna.Extensions.Logging/LogDisplayLogger.cs
@@ -67,10 +67,11 @@ public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Except
             builder.Append(" ");
         }
 
-        builder.Append(GetLogLevelString(logLevel));
-        builder.Append(": ");
+        builder.Append("[");
+        builder.Append(logLevel);
+        builder.Append("] ");
         builder.Append(_name);
-        builder.Append(" ");
+        builder.Append(": ");
         builder.Append(message);
 
         if (exception != null)
@@ -86,18 +87,4 @@ public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Except
             Show();
         }
     }
-
-    private static string GetLogLevelString(LogLevel logLevel)
-    {
-        return logLevel switch
-        {
-            LogLevel.Trace => "trce",
-            LogLevel.Debug => "dbug",
-            LogLevel.Information => "info",
-            LogLevel.Warning => "warn",
-            LogLevel.Error => "fail",
-            LogLevel.Critical => "crit",
-            _ => throw new ArgumentOutOfRangeException(nameof(logLevel))
-        };
-    }
 }