diff --git a/test/Templates.Test/Helpers/ProcessEx.cs b/test/Templates.Test/Helpers/ProcessEx.cs
index f2204835c8..da775c995f 100644
--- a/test/Templates.Test/Helpers/ProcessEx.cs
+++ b/test/Templates.Test/Helpers/ProcessEx.cs
@@ -31,7 +31,7 @@ namespace Templates.Test.Helpers
             {
                 foreach (var envVar in envVars)
                 {
-                    startInfo.EnvironmentVariables.Add(envVar.Key, envVar.Value);
+                    startInfo.EnvironmentVariables[envVar.Key] = envVar.Value;
                 }
             }