diff --git a/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationProvider.java b/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationProvider.java
index 0d86780..00383a0 100644
--- a/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationProvider.java
+++ b/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationProvider.java
@@ -82,13 +82,13 @@ public class OAuth2ClientAuthenticationProvider implements AuthenticationProvide
 			throwInvalidClient();
 		}
 
-		boolean authenticatedCredentials = false;
-
 		if (!registeredClient.getClientAuthenticationMethods().contains(
 				clientAuthentication.getClientAuthenticationMethod())) {
 			throwInvalidClient();
 		}
 
+		boolean authenticatedCredentials = false;
+
 		if (clientAuthentication.getCredentials() != null) {
 			String clientSecret = clientAuthentication.getCredentials().toString();
 			// TODO Use PasswordEncoder.matches()
diff --git a/oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2AuthorizationCodeGrantTests.java b/oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2AuthorizationCodeGrantTests.java
index 20ea649..4c904ff 100644
--- a/oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2AuthorizationCodeGrantTests.java
+++ b/oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2AuthorizationCodeGrantTests.java
@@ -181,9 +181,7 @@ public class OAuth2AuthorizationCodeGrantTests {
 	public void requestWhenPublicClientWithPkceThenReturnAccessTokenResponse() throws Exception {
 		this.spring.register(AuthorizationServerConfiguration.class).autowire();
 
-		RegisteredClient registeredClient = TestRegisteredClients.registeredPublicClient()
-				.tokenSettings(tokenSettings -> tokenSettings.enableRefreshTokens(false))
-				.build();
+		RegisteredClient registeredClient = TestRegisteredClients.registeredPublicClient().build();
 		when(registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
 				.thenReturn(registeredClient);
 
diff --git a/oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2ClientCredentialsGrantTests.java b/oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2ClientCredentialsGrantTests.java
index 16895f9..e7bc6c6 100644
--- a/oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2ClientCredentialsGrantTests.java
+++ b/oauth2-authorization-server/src/test/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2ClientCredentialsGrantTests.java
@@ -115,6 +115,27 @@ public class OAuth2ClientCredentialsGrantTests {
 		verify(authorizationService).save(any());
 	}
 
+	@Test
+	public void requestWhenTokenRequestPostsClientCredentialsThenTokenResponse() throws Exception {
+		this.spring.register(AuthorizationServerConfiguration.class).autowire();
+
+		RegisteredClient registeredClient = TestRegisteredClients.registeredClient2().build();
+		when(registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
+				.thenReturn(registeredClient);
+
+		this.mvc.perform(post(OAuth2TokenEndpointFilter.DEFAULT_TOKEN_ENDPOINT_URI)
+				.param(OAuth2ParameterNames.GRANT_TYPE, AuthorizationGrantType.CLIENT_CREDENTIALS.getValue())
+				.param(OAuth2ParameterNames.SCOPE, "scope1 scope2")
+				.param(OAuth2ParameterNames.CLIENT_ID, registeredClient.getClientId())
+				.param(OAuth2ParameterNames.CLIENT_SECRET, registeredClient.getClientSecret()))
+				.andExpect(status().isOk())
+				.andExpect(jsonPath("$.access_token").isNotEmpty())
+				.andExpect(jsonPath("$.scope").value("scope1 scope2"));
+
+		verify(registeredClientRepository).findByClientId(eq(registeredClient.getClientId()));
+		verify(authorizationService).save(any());
+	}
+
 	private static String encodeBasicAuth(String clientId, String secret) throws Exception {
 		clientId = URLEncoder.encode(clientId, StandardCharsets.UTF_8.name());
 		secret = URLEncoder.encode(secret, StandardCharsets.UTF_8.name());
diff --git a/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationProviderTests.java b/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationProviderTests.java
index 36df4bd..0571306 100644
--- a/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationProviderTests.java
+++ b/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationProviderTests.java
@@ -380,7 +380,7 @@ public class OAuth2ClientAuthenticationProviderTests {
 	}
 
 	@Test
-	public void authenticateWhenClientAuthenticationWithUnregisteredClientAuthenticationMethodThenThrowOAuth2AuthenticationException() {
+	public void authenticateWhenClientAuthenticationMethodNotConfiguredThenThrowOAuth2AuthenticationException() {
 		RegisteredClient registeredClient = TestRegisteredClients.registeredClient().build();
 		when(this.registeredClientRepository.findByClientId(eq(registeredClient.getClientId())))
 				.thenReturn(registeredClient);
diff --git a/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationTokenTests.java b/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationTokenTests.java
index 5ce04df..804b1f9 100644
--- a/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationTokenTests.java
+++ b/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientAuthenticationTokenTests.java
@@ -95,15 +95,4 @@ public class OAuth2ClientAuthenticationTokenTests {
 		assertThat(authentication.getCredentials()).isNull();
 		assertThat(authentication.getRegisteredClient()).isEqualTo(registeredClient);
 	}
-
-	@Test
-	public void constructorWhenClientCredentialsAndClientAuthenticationMethodProvidedThenCreated() {
-		OAuth2ClientAuthenticationToken authentication = new OAuth2ClientAuthenticationToken("clientId", "secret",
-				ClientAuthenticationMethod.BASIC, null);
-		assertThat(authentication.isAuthenticated()).isFalse();
-		assertThat(authentication.getPrincipal().toString()).isEqualTo("clientId");
-		assertThat(authentication.getCredentials()).isEqualTo("secret");
-		assertThat(authentication.getRegisteredClient()).isNull();
-		assertThat(authentication.getClientAuthenticationMethod()).isEqualTo(ClientAuthenticationMethod.BASIC);
-	}
 }
diff --git a/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/client/TestRegisteredClients.java b/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/client/TestRegisteredClients.java
index a321ca3..1e5b7ba 100644
--- a/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/client/TestRegisteredClients.java
+++ b/oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/client/TestRegisteredClients.java
@@ -44,6 +44,7 @@ public class TestRegisteredClients {
 				.authorizationGrantType(AuthorizationGrantType.REFRESH_TOKEN)
 				.authorizationGrantType(AuthorizationGrantType.CLIENT_CREDENTIALS)
 				.clientAuthenticationMethod(ClientAuthenticationMethod.BASIC)
+				.clientAuthenticationMethod(ClientAuthenticationMethod.POST)
 				.redirectUri("https://example.com")
 				.scope("openid")
 				.scope("profile")
@@ -61,6 +62,7 @@ public class TestRegisteredClients {
 				.scope("openid")
 				.scope("profile")
 				.scope("email")
-				.clientSettings(clientSettings -> clientSettings.requireProofKey(true));
+				.clientSettings(clientSettings -> clientSettings.requireProofKey(true))
+				.tokenSettings(tokenSettings -> tokenSettings.enableRefreshTokens(false));
 	}
 }