diff --git a/build_projects/dotnet-cli-build/DotNetTest.cs b/build_projects/dotnet-cli-build/DotNetTest.cs
index 735356771..6ed55055c 100644
--- a/build_projects/dotnet-cli-build/DotNetTest.cs
+++ b/build_projects/dotnet-cli-build/DotNetTest.cs
@@ -37,7 +37,7 @@ namespace Microsoft.DotNet.Cli.Build
         {
             if (!string.IsNullOrEmpty(Logger))
             {
-                return $"--logger {Logger}";
+                return $"--logger:{Logger}";
             }
 
             return null;