diff --git a/src/OrchardCore.Modules/OrchardCore.Email/Views/Admin/Index.cshtml b/src/OrchardCore.Modules/OrchardCore.Email/Views/Admin/Index.cshtml
index 7e1881e252d..5d27ca9b7de 100644
--- a/src/OrchardCore.Modules/OrchardCore.Email/Views/Admin/Index.cshtml
+++ b/src/OrchardCore.Modules/OrchardCore.Email/Views/Admin/Index.cshtml
@@ -56,6 +56,6 @@
         </div>
     </div>
     <div class="mb-3">
-        <button type="submit" id="emailtestsend" class="button grey">@T["Send"]</button>
+        <button type="submit" id="emailtestsend" class="btn btn-primary">@T["Send"]</button>
     </div>
 </form>