diff --git a/src/HealthChecks/Abstractions/ref/Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions.netstandard2.0.cs b/src/HealthChecks/Abstractions/ref/Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions.netstandard2.0.cs
index c0117ef473..7fb5beb0e9 100644
--- a/src/HealthChecks/Abstractions/ref/Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions.netstandard2.0.cs
+++ b/src/HealthChecks/Abstractions/ref/Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions.netstandard2.0.cs
@@ -10,8 +10,8 @@ namespace Microsoft.Extensions.Diagnostics.HealthChecks
     }
     public sealed partial class HealthCheckRegistration
     {
-        public HealthCheckRegistration(string name, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck instance, System.Nullable<Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus> failureStatus, System.Collections.Generic.IEnumerable<string> tags) { }
-        public HealthCheckRegistration(string name, System.Func<System.IServiceProvider, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck> factory, System.Nullable<Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus> failureStatus, System.Collections.Generic.IEnumerable<string> tags) { }
+        public HealthCheckRegistration(string name, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck instance, Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus? failureStatus, System.Collections.Generic.IEnumerable<string> tags) { }
+        public HealthCheckRegistration(string name, System.Func<System.IServiceProvider, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck> factory, Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus? failureStatus, System.Collections.Generic.IEnumerable<string> tags) { }
         public System.Func<System.IServiceProvider, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck> Factory { get { throw null; } set { } }
         public Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus FailureStatus { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } [System.Runtime.CompilerServices.CompilerGeneratedAttribute]set { } }
         public string Name { get { throw null; } set { } }
diff --git a/src/HealthChecks/HealthChecks/ref/Microsoft.Extensions.Diagnostics.HealthChecks.netstandard2.0.cs b/src/HealthChecks/HealthChecks/ref/Microsoft.Extensions.Diagnostics.HealthChecks.netstandard2.0.cs
index 89281584e2..58bdc80602 100644
--- a/src/HealthChecks/HealthChecks/ref/Microsoft.Extensions.Diagnostics.HealthChecks.netstandard2.0.cs
+++ b/src/HealthChecks/HealthChecks/ref/Microsoft.Extensions.Diagnostics.HealthChecks.netstandard2.0.cs
@@ -5,10 +5,10 @@ namespace Microsoft.Extensions.DependencyInjection
 {
     public static partial class HealthChecksBuilderAddCheckExtensions
     {
-        public static Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder AddCheck(this Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder builder, string name, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck instance, System.Nullable<Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus> failureStatus = default(System.Nullable<Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus>), System.Collections.Generic.IEnumerable<string> tags = null) { throw null; }
-        public static Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder AddCheck<T>(this Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder builder, string name, System.Nullable<Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus> failureStatus = default(System.Nullable<Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus>), System.Collections.Generic.IEnumerable<string> tags = null) where T : class, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck { throw null; }
-        public static Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder AddTypeActivatedCheck<T>(this Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder builder, string name, System.Nullable<Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus> failureStatus, System.Collections.Generic.IEnumerable<string> tags, params object[] args) where T : class, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck { throw null; }
-        public static Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder AddTypeActivatedCheck<T>(this Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder builder, string name, System.Nullable<Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus> failureStatus, params object[] args) where T : class, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck { throw null; }
+        public static Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder AddCheck(this Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder builder, string name, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck instance, Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus? failureStatus = default(Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus?), System.Collections.Generic.IEnumerable<string> tags = null) { throw null; }
+        public static Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder AddCheck<T>(this Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder builder, string name, Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus? failureStatus = default(Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus?), System.Collections.Generic.IEnumerable<string> tags = null) where T : class, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck { throw null; }
+        public static Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder AddTypeActivatedCheck<T>(this Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder builder, string name, Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus? failureStatus, System.Collections.Generic.IEnumerable<string> tags, params object[] args) where T : class, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck { throw null; }
+        public static Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder AddTypeActivatedCheck<T>(this Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder builder, string name, Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus? failureStatus, params object[] args) where T : class, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck { throw null; }
         public static Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder AddTypeActivatedCheck<T>(this Microsoft.Extensions.DependencyInjection.IHealthChecksBuilder builder, string name, params object[] args) where T : class, Microsoft.Extensions.Diagnostics.HealthChecks.IHealthCheck { throw null; }
     }
     public static partial class HealthChecksBuilderDelegateExtensions