diff --git a/src/Umbraco.Core/DependencyInjection/ServiceCollectionExtensions.cs b/src/Umbraco.Core/DependencyInjection/ServiceCollectionExtensions.cs
index 6c806ce0db..d0f198557f 100644
--- a/src/Umbraco.Core/DependencyInjection/ServiceCollectionExtensions.cs
+++ b/src/Umbraco.Core/DependencyInjection/ServiceCollectionExtensions.cs
@@ -37,6 +37,19 @@ namespace Umbraco.Extensions
             services.Add(ServiceDescriptor.Describe(typeof(TService), typeof(TImplementing), lifetime));
         }
 
+        /// <summary>
+        /// Adds services of types <typeparamref name="TService1"/> &amp; <typeparamref name="TService2"/> with a shared implementation type of <typeparamref name="TImplementing"/> to the specified <see cref="IServiceCollection"/>.
+        /// </summary>
+        /// <remarks>
+        /// Removes all previous registrations for the types <typeparamref name="TService1"/> &amp; <typeparamref name="TService2"/>.
+        /// </remarks>
+        public static void AddMultipleUnique<TService1, TService2, TImplementing>(
+            this IServiceCollection services)
+            where TService1 : class
+            where TService2 : class
+            where TImplementing : class, TService1, TService2
+            => services.AddMultipleUnique<TService1, TService2, TImplementing>(ServiceLifetime.Singleton);
+
         /// <summary>
         /// Adds services of types <typeparamref name="TService1"/> &amp; <typeparamref name="TService2"/> with a shared implementation type of <typeparamref name="TImplementing"/> to the specified <see cref="IServiceCollection"/>.
         /// </summary>
@@ -45,7 +58,7 @@ namespace Umbraco.Extensions
         /// </remarks>
         public static void AddMultipleUnique<TService1, TService2, TImplementing>(
             this IServiceCollection services,
-            ServiceLifetime lifetime = ServiceLifetime.Singleton)
+            ServiceLifetime lifetime)
             where TService1 : class
             where TService2 : class
             where TImplementing : class, TService1, TService2
@@ -63,6 +76,18 @@ namespace Umbraco.Extensions
             services.AddSingleton<TImplementing>();
         }
 
+        /// <summary>
+        /// Adds a service of type <typeparamref name="TService"/> with an implementation factory method to the specified <see cref="IServiceCollection"/>.
+        /// </summary>
+        /// <remarks>
+        /// Removes all previous registrations for the type <typeparamref name="TService"/>.
+        /// </remarks>
+        public static void AddUnique<TService>(
+            this IServiceCollection services,
+            Func<IServiceProvider, TService> factory)
+            where TService : class
+            => services.AddUnique(factory, ServiceLifetime.Singleton);
+
         /// <summary>
         /// Adds a service of type <typeparamref name="TService"/> with an implementation factory method to the specified <see cref="IServiceCollection"/>.
         /// </summary>
@@ -72,7 +97,7 @@ namespace Umbraco.Extensions
         public static void AddUnique<TService>(
             this IServiceCollection services,
             Func<IServiceProvider, TService> factory,
-            ServiceLifetime lifetime = ServiceLifetime.Singleton)
+            ServiceLifetime lifetime)
             where TService : class
         {
             services.RemoveAll<TService>();