diff --git a/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WinHttpClients.java b/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WinHttpClients.java
index 89a7af978..a8f32f639 100644
--- a/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WinHttpClients.java
+++ b/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WinHttpClients.java
@@ -67,10 +67,10 @@ public class WinHttpClients {
     private static HttpClientBuilder createBuilder() {
         if (isWinAuthAvailable()) {
             final Registry<AuthSchemeFactory> authSchemeRegistry = RegistryBuilder.<AuthSchemeFactory>create()
-                    .register(AuthSchemes.BASIC.id, new BasicSchemeFactory())
-                    .register(AuthSchemes.DIGEST.id, new DigestSchemeFactory())
-                    .register(AuthSchemes.NTLM.id, new WindowsNTLMSchemeFactory(null))
-                    .register(AuthSchemes.SPNEGO.id, new WindowsNegotiateSchemeFactory(null))
+                    .register(AuthSchemes.BASIC.id, BasicSchemeFactory.INSTANCE)
+                    .register(AuthSchemes.DIGEST.id, DigestSchemeFactory.INSTANCE)
+                    .register(AuthSchemes.NTLM.id, WindowsNTLMSchemeFactory.DEFAULT)
+                    .register(AuthSchemes.SPNEGO.id, WindowsNegotiateSchemeFactory.DEFAULT)
                     .build();
             return HttpClientBuilder.create()
                     .setDefaultAuthSchemeRegistry(authSchemeRegistry);
diff --git a/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WindowsNTLMSchemeFactory.java b/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WindowsNTLMSchemeFactory.java
index cc0863237..90063bdeb 100644
--- a/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WindowsNTLMSchemeFactory.java
+++ b/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WindowsNTLMSchemeFactory.java
@@ -45,6 +45,11 @@ import org.apache.hc.core5.http.protocol.HttpContext;
 @Experimental
 public class WindowsNTLMSchemeFactory implements AuthSchemeFactory {
 
+    /**
+     * Singleton instance with a null name.
+     */
+    public static final WindowsNTLMSchemeFactory DEFAULT = new WindowsNTLMSchemeFactory(null);
+
     private final String servicePrincipalName;
 
     public WindowsNTLMSchemeFactory(final String servicePrincipalName) {
diff --git a/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WindowsNegotiateSchemeFactory.java b/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WindowsNegotiateSchemeFactory.java
index 6348fb5f0..394150b67 100644
--- a/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WindowsNegotiateSchemeFactory.java
+++ b/httpclient5-win/src/main/java/org/apache/hc/client5/http/impl/win/WindowsNegotiateSchemeFactory.java
@@ -45,6 +45,11 @@ import org.apache.hc.core5.http.protocol.HttpContext;
 @Experimental
 public class WindowsNegotiateSchemeFactory implements AuthSchemeFactory {
 
+    /**
+     * Singleton instance with a null name.
+     */
+    public static final WindowsNegotiateSchemeFactory DEFAULT = new WindowsNegotiateSchemeFactory(null);
+
     private final String servicePrincipalName;
 
     public WindowsNegotiateSchemeFactory(final String servicePrincipalName) {
diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/H2AsyncClientBuilder.java b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/H2AsyncClientBuilder.java
index adeb0bca9..fa6ef7301 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/H2AsyncClientBuilder.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/H2AsyncClientBuilder.java
@@ -42,12 +42,10 @@ import org.apache.hc.client5.http.AuthenticationStrategy;
 import org.apache.hc.client5.http.DnsResolver;
 import org.apache.hc.client5.http.HttpRequestRetryStrategy;
 import org.apache.hc.client5.http.SchemePortResolver;
-import org.apache.hc.client5.http.SystemDefaultDnsResolver;
 import org.apache.hc.client5.http.async.AsyncExecChainHandler;
 import org.apache.hc.client5.http.auth.AuthSchemeFactory;
 import org.apache.hc.client5.http.auth.AuthSchemes;
 import org.apache.hc.client5.http.auth.CredentialsProvider;
-import org.apache.hc.client5.http.auth.KerberosConfig;
 import org.apache.hc.client5.http.config.RequestConfig;
 import org.apache.hc.client5.http.cookie.BasicCookieStore;
 import org.apache.hc.client5.http.cookie.CookieSpecFactory;
@@ -763,13 +761,11 @@ public class H2AsyncClientBuilder {
         Lookup<AuthSchemeFactory> authSchemeRegistryCopy = this.authSchemeRegistry;
         if (authSchemeRegistryCopy == null) {
             authSchemeRegistryCopy = RegistryBuilder.<AuthSchemeFactory>create()
-                    .register(AuthSchemes.BASIC.id, new BasicSchemeFactory())
-                    .register(AuthSchemes.DIGEST.id, new DigestSchemeFactory())
-                    .register(AuthSchemes.NTLM.id, new NTLMSchemeFactory())
-                    .register(AuthSchemes.SPNEGO.id,
-                            new SPNegoSchemeFactory(KerberosConfig.DEFAULT, SystemDefaultDnsResolver.INSTANCE))
-                    .register(AuthSchemes.KERBEROS.id,
-                            new KerberosSchemeFactory(KerberosConfig.DEFAULT, SystemDefaultDnsResolver.INSTANCE))
+                    .register(AuthSchemes.BASIC.id, BasicSchemeFactory.INSTANCE)
+                    .register(AuthSchemes.DIGEST.id, DigestSchemeFactory.INSTANCE)
+                    .register(AuthSchemes.NTLM.id, NTLMSchemeFactory.INSTANCE)
+                    .register(AuthSchemes.SPNEGO.id, SPNegoSchemeFactory.DEFAULT)
+                    .register(AuthSchemes.KERBEROS.id, KerberosSchemeFactory.DEFAULT)
                     .build();
         }
         Lookup<CookieSpecFactory> cookieSpecRegistryCopy = this.cookieSpecRegistry;
diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/HttpAsyncClientBuilder.java b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/HttpAsyncClientBuilder.java
index 21823e634..154737ca7 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/HttpAsyncClientBuilder.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/HttpAsyncClientBuilder.java
@@ -42,13 +42,11 @@ import org.apache.hc.client5.http.AuthenticationStrategy;
 import org.apache.hc.client5.http.ConnectionKeepAliveStrategy;
 import org.apache.hc.client5.http.HttpRequestRetryStrategy;
 import org.apache.hc.client5.http.SchemePortResolver;
-import org.apache.hc.client5.http.SystemDefaultDnsResolver;
 import org.apache.hc.client5.http.UserTokenHandler;
 import org.apache.hc.client5.http.async.AsyncExecChainHandler;
 import org.apache.hc.client5.http.auth.AuthSchemeFactory;
 import org.apache.hc.client5.http.auth.AuthSchemes;
 import org.apache.hc.client5.http.auth.CredentialsProvider;
-import org.apache.hc.client5.http.auth.KerberosConfig;
 import org.apache.hc.client5.http.config.RequestConfig;
 import org.apache.hc.client5.http.cookie.BasicCookieStore;
 import org.apache.hc.client5.http.cookie.CookieSpecFactory;
@@ -970,13 +968,11 @@ public class HttpAsyncClientBuilder {
         Lookup<AuthSchemeFactory> authSchemeRegistryCopy = this.authSchemeRegistry;
         if (authSchemeRegistryCopy == null) {
             authSchemeRegistryCopy = RegistryBuilder.<AuthSchemeFactory>create()
-                    .register(AuthSchemes.BASIC.id, new BasicSchemeFactory())
-                    .register(AuthSchemes.DIGEST.id, new DigestSchemeFactory())
-                    .register(AuthSchemes.NTLM.id, new NTLMSchemeFactory())
-                    .register(AuthSchemes.SPNEGO.id,
-                            new SPNegoSchemeFactory(KerberosConfig.DEFAULT, SystemDefaultDnsResolver.INSTANCE))
-                    .register(AuthSchemes.KERBEROS.id,
-                            new KerberosSchemeFactory(KerberosConfig.DEFAULT, SystemDefaultDnsResolver.INSTANCE))
+                    .register(AuthSchemes.BASIC.id, BasicSchemeFactory.INSTANCE)
+                    .register(AuthSchemes.DIGEST.id, DigestSchemeFactory.INSTANCE)
+                    .register(AuthSchemes.NTLM.id, NTLMSchemeFactory.INSTANCE)
+                    .register(AuthSchemes.SPNEGO.id, SPNegoSchemeFactory.DEFAULT)
+                    .register(AuthSchemes.KERBEROS.id, KerberosSchemeFactory.DEFAULT)
                     .build();
         }
         Lookup<CookieSpecFactory> cookieSpecRegistryCopy = this.cookieSpecRegistry;
diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/BasicSchemeFactory.java b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/BasicSchemeFactory.java
index 9b471c36c..b81875b50 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/BasicSchemeFactory.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/BasicSchemeFactory.java
@@ -44,6 +44,11 @@ import org.apache.hc.core5.http.protocol.HttpContext;
 @Contract(threading = ThreadingBehavior.STATELESS)
 public class BasicSchemeFactory implements AuthSchemeFactory {
 
+    /**
+     * Singleton instance with a null Charset.
+     */
+    public static final BasicSchemeFactory INSTANCE = new BasicSchemeFactory();
+
     private final Charset charset;
 
     /**
diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/DigestSchemeFactory.java b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/DigestSchemeFactory.java
index 7a5107414..26e789852 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/DigestSchemeFactory.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/DigestSchemeFactory.java
@@ -42,6 +42,11 @@ import org.apache.hc.core5.http.protocol.HttpContext;
 @Contract(threading = ThreadingBehavior.STATELESS)
 public class DigestSchemeFactory implements AuthSchemeFactory {
 
+    /**
+     * Singleton instance.
+     */
+    public static final DigestSchemeFactory INSTANCE = new DigestSchemeFactory();
+
     @Override
     public AuthScheme create(final HttpContext context) {
         return new DigestScheme();
diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/KerberosSchemeFactory.java b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/KerberosSchemeFactory.java
index 0bb265812..9119a75de 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/KerberosSchemeFactory.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/KerberosSchemeFactory.java
@@ -27,6 +27,7 @@
 package org.apache.hc.client5.http.impl.auth;
 
 import org.apache.hc.client5.http.DnsResolver;
+import org.apache.hc.client5.http.SystemDefaultDnsResolver;
 import org.apache.hc.client5.http.auth.AuthScheme;
 import org.apache.hc.client5.http.auth.AuthSchemeFactory;
 import org.apache.hc.client5.http.auth.KerberosConfig;
@@ -49,6 +50,12 @@ import org.apache.hc.core5.http.protocol.HttpContext;
 @Experimental
 public class KerberosSchemeFactory implements AuthSchemeFactory {
 
+    /**
+     * Singleton instance for the default configuration.
+     */
+    public static final KerberosSchemeFactory DEFAULT = new KerberosSchemeFactory(KerberosConfig.DEFAULT,
+            SystemDefaultDnsResolver.INSTANCE);
+
     private final KerberosConfig config;
     private final DnsResolver dnsResolver;
 
diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/NTLMSchemeFactory.java b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/NTLMSchemeFactory.java
index fd304d832..66642a59c 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/NTLMSchemeFactory.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/NTLMSchemeFactory.java
@@ -43,6 +43,11 @@ import org.apache.hc.core5.http.protocol.HttpContext;
 @Contract(threading = ThreadingBehavior.STATELESS)
 public class NTLMSchemeFactory implements AuthSchemeFactory {
 
+    /**
+     * Singleton instance.
+     */
+    public static final NTLMSchemeFactory INSTANCE = new NTLMSchemeFactory();
+
     @Override
     public AuthScheme create(final HttpContext context) {
         return new NTLMScheme();
diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/SPNegoSchemeFactory.java b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/SPNegoSchemeFactory.java
index 3bbb116bb..7953c8f3b 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/SPNegoSchemeFactory.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/auth/SPNegoSchemeFactory.java
@@ -27,6 +27,7 @@
 package org.apache.hc.client5.http.impl.auth;
 
 import org.apache.hc.client5.http.DnsResolver;
+import org.apache.hc.client5.http.SystemDefaultDnsResolver;
 import org.apache.hc.client5.http.auth.AuthScheme;
 import org.apache.hc.client5.http.auth.AuthSchemeFactory;
 import org.apache.hc.client5.http.auth.KerberosConfig;
@@ -49,6 +50,12 @@ import org.apache.hc.core5.http.protocol.HttpContext;
 @Experimental
 public class SPNegoSchemeFactory implements AuthSchemeFactory {
 
+    /**
+     * Singleton instance for the default configuration.
+     */
+    public static final SPNegoSchemeFactory DEFAULT = new SPNegoSchemeFactory(KerberosConfig.DEFAULT,
+            SystemDefaultDnsResolver.INSTANCE);
+
     private final KerberosConfig config;
     private final DnsResolver dnsResolver;
 
diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/HttpClientBuilder.java b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/HttpClientBuilder.java
index 89197cdc6..5a3251b82 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/HttpClientBuilder.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/HttpClientBuilder.java
@@ -41,12 +41,10 @@ import org.apache.hc.client5.http.AuthenticationStrategy;
 import org.apache.hc.client5.http.ConnectionKeepAliveStrategy;
 import org.apache.hc.client5.http.HttpRequestRetryStrategy;
 import org.apache.hc.client5.http.SchemePortResolver;
-import org.apache.hc.client5.http.SystemDefaultDnsResolver;
 import org.apache.hc.client5.http.UserTokenHandler;
 import org.apache.hc.client5.http.auth.AuthSchemeFactory;
 import org.apache.hc.client5.http.auth.AuthSchemes;
 import org.apache.hc.client5.http.auth.CredentialsProvider;
-import org.apache.hc.client5.http.auth.KerberosConfig;
 import org.apache.hc.client5.http.classic.BackoffManager;
 import org.apache.hc.client5.http.classic.ConnectionBackoffStrategy;
 import org.apache.hc.client5.http.classic.ExecChainHandler;
@@ -942,11 +940,11 @@ public class HttpClientBuilder {
         Lookup<AuthSchemeFactory> authSchemeRegistryCopy = this.authSchemeRegistry;
         if (authSchemeRegistryCopy == null) {
             authSchemeRegistryCopy = RegistryBuilder.<AuthSchemeFactory>create()
-                .register(AuthSchemes.BASIC.id, new BasicSchemeFactory())
-                .register(AuthSchemes.DIGEST.id, new DigestSchemeFactory())
-                .register(AuthSchemes.NTLM.id, new NTLMSchemeFactory())
-                .register(AuthSchemes.SPNEGO.id, new SPNegoSchemeFactory(KerberosConfig.DEFAULT, SystemDefaultDnsResolver.INSTANCE))
-                .register(AuthSchemes.KERBEROS.id, new KerberosSchemeFactory(KerberosConfig.DEFAULT, SystemDefaultDnsResolver.INSTANCE))
+                .register(AuthSchemes.BASIC.id, BasicSchemeFactory.INSTANCE)
+                .register(AuthSchemes.DIGEST.id, DigestSchemeFactory.INSTANCE)
+                .register(AuthSchemes.NTLM.id, NTLMSchemeFactory.INSTANCE)
+                .register(AuthSchemes.SPNEGO.id, SPNegoSchemeFactory.DEFAULT)
+                .register(AuthSchemes.KERBEROS.id, KerberosSchemeFactory.DEFAULT)
                 .build();
         }
         Lookup<CookieSpecFactory> cookieSpecRegistryCopy = this.cookieSpecRegistry;
diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/ProxyClient.java b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/ProxyClient.java
index 3156cd513..f70928b32 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/ProxyClient.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/ProxyClient.java
@@ -34,14 +34,12 @@ import org.apache.hc.client5.http.AuthenticationStrategy;
 import org.apache.hc.client5.http.HttpRoute;
 import org.apache.hc.client5.http.RouteInfo.LayerType;
 import org.apache.hc.client5.http.RouteInfo.TunnelType;
-import org.apache.hc.client5.http.SystemDefaultDnsResolver;
 import org.apache.hc.client5.http.auth.AuthExchange;
 import org.apache.hc.client5.http.auth.AuthSchemeFactory;
 import org.apache.hc.client5.http.auth.AuthSchemes;
 import org.apache.hc.client5.http.auth.AuthScope;
 import org.apache.hc.client5.http.auth.ChallengeType;
 import org.apache.hc.client5.http.auth.Credentials;
-import org.apache.hc.client5.http.auth.KerberosConfig;
 import org.apache.hc.client5.http.config.RequestConfig;
 import org.apache.hc.client5.http.impl.DefaultAuthenticationStrategy;
 import org.apache.hc.client5.http.impl.TunnelRefusedException;
@@ -115,13 +113,11 @@ public class ProxyClient {
         this.authenticator = new HttpAuthenticator();
         this.proxyAuthExchange = new AuthExchange();
         this.authSchemeRegistry = RegistryBuilder.<AuthSchemeFactory>create()
-                .register(AuthSchemes.BASIC.id, new BasicSchemeFactory())
-                .register(AuthSchemes.DIGEST.id, new DigestSchemeFactory())
-                .register(AuthSchemes.NTLM.id, new NTLMSchemeFactory())
-                .register(AuthSchemes.SPNEGO.id,
-                        new SPNegoSchemeFactory(KerberosConfig.DEFAULT, SystemDefaultDnsResolver.INSTANCE))
-                .register(AuthSchemes.KERBEROS.id,
-                        new KerberosSchemeFactory(KerberosConfig.DEFAULT, SystemDefaultDnsResolver.INSTANCE))
+                .register(AuthSchemes.BASIC.id, BasicSchemeFactory.INSTANCE)
+                .register(AuthSchemes.DIGEST.id, DigestSchemeFactory.INSTANCE)
+                .register(AuthSchemes.NTLM.id, NTLMSchemeFactory.INSTANCE)
+                .register(AuthSchemes.SPNEGO.id, SPNegoSchemeFactory.DEFAULT)
+                .register(AuthSchemes.KERBEROS.id, KerberosSchemeFactory.DEFAULT)
                 .build();
         this.reuseStrategy = new DefaultConnectionReuseStrategy();
     }
diff --git a/httpclient5/src/test/java/org/apache/hc/client5/http/impl/TestAuthenticationStrategy.java b/httpclient5/src/test/java/org/apache/hc/client5/http/impl/TestAuthenticationStrategy.java
index 975c4e27e..50eac5321 100644
--- a/httpclient5/src/test/java/org/apache/hc/client5/http/impl/TestAuthenticationStrategy.java
+++ b/httpclient5/src/test/java/org/apache/hc/client5/http/impl/TestAuthenticationStrategy.java
@@ -109,8 +109,8 @@ public class TestAuthenticationStrategy {
                 new BasicNameValuePair("realm", "realm3")));
 
         final Registry<AuthSchemeFactory> authSchemeRegistry = RegistryBuilder.<AuthSchemeFactory>create()
-            .register(AuthSchemes.BASIC.id, new BasicSchemeFactory())
-            .register(AuthSchemes.DIGEST.id, new DigestSchemeFactory()).build();
+            .register(AuthSchemes.BASIC.id, BasicSchemeFactory.INSTANCE)
+            .register(AuthSchemes.DIGEST.id, DigestSchemeFactory.INSTANCE).build();
         context.setAuthSchemeRegistry(authSchemeRegistry);
 
         final BasicCredentialsProvider credentialsProvider = new BasicCredentialsProvider();
@@ -143,8 +143,8 @@ public class TestAuthenticationStrategy {
                 new BasicNameValuePair("realm", "realm2"), new BasicNameValuePair("nonce", "1234")));
 
         final Registry<AuthSchemeFactory> authSchemeRegistry = RegistryBuilder.<AuthSchemeFactory>create()
-            .register(AuthSchemes.BASIC.id, new BasicSchemeFactory())
-            .register(AuthSchemes.DIGEST.id, new DigestSchemeFactory()).build();
+            .register(AuthSchemes.BASIC.id, BasicSchemeFactory.INSTANCE)
+            .register(AuthSchemes.DIGEST.id, DigestSchemeFactory.INSTANCE).build();
         context.setAuthSchemeRegistry(authSchemeRegistry);
         context.setRequestConfig(config);
 
diff --git a/httpclient5/src/test/java/org/apache/hc/client5/http/impl/auth/TestHttpAuthenticator.java b/httpclient5/src/test/java/org/apache/hc/client5/http/impl/auth/TestHttpAuthenticator.java
index 2c0247bf4..edad5a0e0 100644
--- a/httpclient5/src/test/java/org/apache/hc/client5/http/impl/auth/TestHttpAuthenticator.java
+++ b/httpclient5/src/test/java/org/apache/hc/client5/http/impl/auth/TestHttpAuthenticator.java
@@ -94,9 +94,9 @@ public class TestHttpAuthenticator {
         this.credentialsProvider = Mockito.mock(CredentialsProvider.class);
         this.context.setAttribute(HttpClientContext.CREDS_PROVIDER, this.credentialsProvider);
         this.authSchemeRegistry = RegistryBuilder.<AuthSchemeFactory>create()
-            .register(AuthSchemes.BASIC.id, new BasicSchemeFactory())
-            .register(AuthSchemes.DIGEST.id, new DigestSchemeFactory())
-            .register(AuthSchemes.NTLM.id, new NTLMSchemeFactory()).build();
+            .register(AuthSchemes.BASIC.id, BasicSchemeFactory.INSTANCE)
+            .register(AuthSchemes.DIGEST.id, DigestSchemeFactory.INSTANCE)
+            .register(AuthSchemes.NTLM.id, NTLMSchemeFactory.INSTANCE).build();
         this.context.setAttribute(HttpClientContext.AUTHSCHEME_REGISTRY, this.authSchemeRegistry);
         this.authCache = Mockito.mock(AuthCache.class);
         this.context.setAttribute(HttpClientContext.AUTH_CACHE, this.authCache);