diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/reactive/ReactiveOAuth2ResourceServerAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/reactive/ReactiveOAuth2ResourceServerAutoConfigurationTests.java
index 0144f0295c..8bb50b120e 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/reactive/ReactiveOAuth2ResourceServerAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/reactive/ReactiveOAuth2ResourceServerAutoConfigurationTests.java
@@ -24,7 +24,6 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Set;
 import java.util.stream.Stream;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
@@ -53,6 +52,7 @@ import org.springframework.security.config.web.server.ServerHttpSecurity;
 import org.springframework.security.core.userdetails.MapReactiveUserDetailsService;
 import org.springframework.security.oauth2.core.DelegatingOAuth2TokenValidator;
 import org.springframework.security.oauth2.core.OAuth2TokenValidator;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
 import org.springframework.security.oauth2.jwt.Jwt;
 import org.springframework.security.oauth2.jwt.JwtClaimValidator;
 import org.springframework.security.oauth2.jwt.JwtIssuerValidator;
@@ -113,7 +113,6 @@ class ReactiveOAuth2ResourceServerAutoConfigurationTests {
 			});
 	}
 
-	@SuppressWarnings("unchecked")
 	@Test
 	@Deprecated
 	void autoConfigurationUsingJwkSetUriShouldConfigureResourceServerUsingJwsAlgorithm() {
@@ -122,8 +121,9 @@ class ReactiveOAuth2ResourceServerAutoConfigurationTests {
 					"spring.security.oauth2.resourceserver.jwt.jws-algorithm=RS512")
 			.run((context) -> {
 				NimbusReactiveJwtDecoder nimbusReactiveJwtDecoder = context.getBean(NimbusReactiveJwtDecoder.class);
-				assertThat(nimbusReactiveJwtDecoder).extracting("jwtProcessor.arg$2.arg$1.jwsAlgs")
-					.matches((algorithms) -> ((Set<JWSAlgorithm>) algorithms).contains(JWSAlgorithm.RS512));
+				assertThat(nimbusReactiveJwtDecoder).extracting("jwtProcessor.arg$1.signatureAlgorithms")
+					.asInstanceOf(InstanceOfAssertFactories.collection(SignatureAlgorithm.class))
+					.containsExactlyInAnyOrder(SignatureAlgorithm.RS512);
 			});
 	}
 
@@ -134,9 +134,9 @@ class ReactiveOAuth2ResourceServerAutoConfigurationTests {
 					"spring.security.oauth2.resourceserver.jwt.jws-algorithms=RS512")
 			.run((context) -> {
 				NimbusReactiveJwtDecoder nimbusReactiveJwtDecoder = context.getBean(NimbusReactiveJwtDecoder.class);
-				assertThat(nimbusReactiveJwtDecoder).extracting("jwtProcessor.arg$2.arg$1.jwsAlgs")
-					.asInstanceOf(InstanceOfAssertFactories.collection(JWSAlgorithm.class))
-					.containsExactlyInAnyOrder(JWSAlgorithm.RS512);
+				assertThat(nimbusReactiveJwtDecoder).extracting("jwtProcessor.arg$1.signatureAlgorithms")
+					.asInstanceOf(InstanceOfAssertFactories.collection(SignatureAlgorithm.class))
+					.containsExactlyInAnyOrder(SignatureAlgorithm.RS512);
 			});
 	}
 
@@ -147,9 +147,10 @@ class ReactiveOAuth2ResourceServerAutoConfigurationTests {
 					"spring.security.oauth2.resourceserver.jwt.jws-algorithms=RS256, RS384, RS512")
 			.run((context) -> {
 				NimbusReactiveJwtDecoder nimbusReactiveJwtDecoder = context.getBean(NimbusReactiveJwtDecoder.class);
-				assertThat(nimbusReactiveJwtDecoder).extracting("jwtProcessor.arg$2.arg$1.jwsAlgs")
-					.asInstanceOf(InstanceOfAssertFactories.collection(JWSAlgorithm.class))
-					.containsExactlyInAnyOrder(JWSAlgorithm.RS256, JWSAlgorithm.RS384, JWSAlgorithm.RS512);
+				assertThat(nimbusReactiveJwtDecoder).extracting("jwtProcessor.arg$1.signatureAlgorithms")
+					.asInstanceOf(InstanceOfAssertFactories.collection(SignatureAlgorithm.class))
+					.containsExactlyInAnyOrder(SignatureAlgorithm.RS256, SignatureAlgorithm.RS384,
+							SignatureAlgorithm.RS512);
 			});
 	}