diff --git a/build.fsx b/build.fsx
index fed8792..9a79ea1 100644
--- a/build.fsx
+++ b/build.fsx
@@ -115,7 +115,7 @@ Target "RunTests" (fun _ ->
             info.WorkingDirectory <- (Directory.GetParent project).FullName
             info.Arguments <- arguments) (TimeSpan.FromMinutes 30.0) 
         
-        ResultHandling.failBuildIfXUnitReportedError TestRunnerErrorLevel.DontFailBuild result  
+        ResultHandling.failBuildIfXUnitReportedError TestRunnerErrorLevel.Error result  
 
     projects |> Seq.iter (log)
     projects |> Seq.iter (runSingleProject)