diff --git a/ICSharpCode.Decompiler.Tests/Helpers/Tester.VB.cs b/ICSharpCode.Decompiler.Tests/Helpers/Tester.VB.cs
index d871bed94..967f564e6 100644
--- a/ICSharpCode.Decompiler.Tests/Helpers/Tester.VB.cs
+++ b/ICSharpCode.Decompiler.Tests/Helpers/Tester.VB.cs
@@ -72,7 +72,7 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 				{
 					references = references.Concat(new[] { "-r:\"Microsoft.VisualBasic.dll\"" });
 				}
-				string otherOptions = $"-noconfig " +
+				string otherOptions = $"-nologo -noconfig " +
 					"-optioninfer+ -optionexplicit+ " +
 					$"-langversion:{languageVersion} " +
 					$"/optimize{(flags.HasFlag(CompilerOptions.Optimize) ? "+ " : "- ")}";
@@ -122,8 +122,14 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 
 				var result = await command.ExecuteBufferedAsync().ConfigureAwait(false);
 
-				Console.WriteLine("output: " + result.StandardOutput);
-				Console.WriteLine("errors: " + result.StandardError);
+				if (!string.IsNullOrWhiteSpace(result.StandardOutput))
+				{
+					Console.WriteLine("output:" + Environment.NewLine + result.StandardOutput);
+				}
+				if (!string.IsNullOrWhiteSpace(result.StandardError))
+				{
+					Console.WriteLine("errors:" + Environment.NewLine + result.StandardError);
+				}
 				Assert.AreEqual(0, result.ExitCode, "vbc failed");
 
 				return results;
diff --git a/ICSharpCode.Decompiler.Tests/Helpers/Tester.cs b/ICSharpCode.Decompiler.Tests/Helpers/Tester.cs
index 3b880ca57..5c5fde420 100644
--- a/ICSharpCode.Decompiler.Tests/Helpers/Tester.cs
+++ b/ICSharpCode.Decompiler.Tests/Helpers/Tester.cs
@@ -176,13 +176,19 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 			}
 
 			var command = Cli.Wrap(ilasmPath)
-				.WithArguments($"/nologo {otherOptions}/output=\"{outputFile}\" \"{sourceFileName}\"")
+				.WithArguments($"/quiet {otherOptions}/output=\"{outputFile}\" \"{sourceFileName}\"")
 				.WithValidation(CommandResultValidation.None);
 
 			var result = await command.ExecuteBufferedAsync().ConfigureAwait(false);
 
-			Console.WriteLine("output: " + result.StandardOutput);
-			Console.WriteLine("errors: " + result.StandardError);
+			if (!string.IsNullOrWhiteSpace(result.StandardOutput))
+			{
+				Console.WriteLine("output:" + Environment.NewLine + result.StandardOutput);
+			}
+			if (!string.IsNullOrWhiteSpace(result.StandardError))
+			{
+				Console.WriteLine("errors:" + Environment.NewLine + result.StandardError);
+			}
 			Assert.AreEqual(0, result.ExitCode, "ilasm failed");
 
 			return outputFile;
@@ -224,8 +230,14 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 
 			var result = await command.ExecuteBufferedAsync().ConfigureAwait(false);
 
-			Console.WriteLine("output: " + result.StandardOutput);
-			Console.WriteLine("errors: " + result.StandardError);
+			if (!string.IsNullOrWhiteSpace(result.StandardOutput))
+			{
+				Console.WriteLine("output:" + Environment.NewLine + result.StandardOutput);
+			}
+			if (!string.IsNullOrWhiteSpace(result.StandardError))
+			{
+				Console.WriteLine("errors:" + Environment.NewLine + result.StandardError);
+			}
 			Assert.AreEqual(0, result.ExitCode, "ildasm failed");
 
 			// Unlike the .imagebase directive (which is a fixed value when compiling with /deterministic),
@@ -430,7 +442,7 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 				{
 					references = references.Concat(new[] { "-r:\"System.Runtime.CompilerServices.Unsafe.dll\"" });
 				}
-				string otherOptions = $"-noconfig " +
+				string otherOptions = $"-nologo -noconfig " +
 					$"-langversion:{languageVersion} " +
 					$"-unsafe -o{(flags.HasFlag(CompilerOptions.Optimize) ? "+ " : "- ")}";
 
@@ -485,9 +497,15 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 				Console.WriteLine($"\"{command.TargetFilePath}\" {command.Arguments}");
 
 				var result = await command.ExecuteBufferedAsync().ConfigureAwait(false);
+				if (!string.IsNullOrWhiteSpace(result.StandardOutput))
+				{
+					Console.WriteLine("output:" + Environment.NewLine + result.StandardOutput);
+				}
+				if (!string.IsNullOrWhiteSpace(result.StandardError))
+				{
+					Console.WriteLine("errors:" + Environment.NewLine + result.StandardError);
+				}
 
-				Console.WriteLine("output: " + result.StandardOutput);
-				Console.WriteLine("errors: " + result.StandardError);
 				Assert.AreEqual(0, result.ExitCode, "csc failed");
 
 				return results;
@@ -542,8 +560,14 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 
 				var result = await command.ExecuteBufferedAsync().ConfigureAwait(false);
 
-				Console.WriteLine("output: " + result.StandardOutput);
-				Console.WriteLine("errors: " + result.StandardError);
+				if (!string.IsNullOrWhiteSpace(result.StandardOutput))
+				{
+					Console.WriteLine("output:" + Environment.NewLine + result.StandardOutput);
+				}
+				if (!string.IsNullOrWhiteSpace(result.StandardError))
+				{
+					Console.WriteLine("errors:" + Environment.NewLine + result.StandardError);
+				}
 				Assert.AreEqual(0, result.ExitCode, "mcs failed");
 
 				return results;
@@ -815,8 +839,14 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 			var result = await command.ExecuteBufferedAsync().ConfigureAwait(false);
 			Assert.AreEqual(0, result.ExitCode, "sn failed");
 
-			Console.WriteLine("output: " + result.StandardOutput);
-			Console.WriteLine("errors: " + result.StandardError);
+			if (!string.IsNullOrWhiteSpace(result.StandardOutput))
+			{
+				Console.WriteLine("output:" + Environment.NewLine + result.StandardOutput);
+			}
+			if (!string.IsNullOrWhiteSpace(result.StandardError))
+			{
+				Console.WriteLine("errors:" + Environment.NewLine + result.StandardError);
+			}
 		}
 
 		public static async Task<string> FindMSBuild()