diff --git a/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpRequest.java b/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpRequest.java
index 90982d159bf..4a9fd9bc611 100644
--- a/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpRequest.java
+++ b/spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpRequest.java
@@ -258,7 +258,7 @@ public final class MockServerHttpRequest extends AbstractServerHttpRequest {
 		/**
 		 * Set SSL session information and certificates.
 		 */
-		void sslInfo(SslInfo sslInfo);
+		B sslInfo(SslInfo sslInfo);
 
 		/**
 		 * Add one or more cookies.
@@ -443,8 +443,9 @@ public final class MockServerHttpRequest extends AbstractServerHttpRequest {
 		}
 
 		@Override
-		public void sslInfo(SslInfo sslInfo) {
+		public BodyBuilder sslInfo(SslInfo sslInfo) {
 			this.sslInfo = sslInfo;
+			return this;
 		}
 
 		@Override
diff --git a/spring-test/src/test/java/org/springframework/mock/http/server/reactive/MockServerHttpRequestTests.java b/spring-test/src/test/java/org/springframework/mock/http/server/reactive/MockServerHttpRequestTests.java
index bdc2649d91d..b2a4dff2ea2 100644
--- a/spring-test/src/test/java/org/springframework/mock/http/server/reactive/MockServerHttpRequestTests.java
+++ b/spring-test/src/test/java/org/springframework/mock/http/server/reactive/MockServerHttpRequestTests.java
@@ -25,6 +25,7 @@ import org.junit.jupiter.api.Named;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
+import org.mockito.internal.util.MockUtil;
 
 import org.springframework.http.HttpCookie;
 import org.springframework.http.HttpHeaders;
@@ -33,6 +34,7 @@ import org.springframework.web.util.UriComponentsBuilder;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
 import static org.junit.jupiter.api.Named.named;
+import static org.mockito.Mockito.mock;
 
 /**
  * Tests for {@link MockServerHttpRequest}.
@@ -66,6 +68,19 @@ class MockServerHttpRequestTests {
 		assertThat(request.getURI().toString()).isEqualTo("/foo%20bar?a=b&name%20A=value%20A1&name%20A=value%20A2&name%20B=value%20B1");
 	}
 
+	/**
+	 * Ensure that {@code sslInfo()} can be used with the fluent builder pattern.
+	 */
+	@Test  // gh-35075
+	void sslInfo() {
+		MockServerHttpRequest request = MockServerHttpRequest.get("/test")
+				.sslInfo(mock())
+				.build();
+
+		assertThat(request.getSslInfo()).as("is mock").satisfies(sslInfo -> MockUtil.isMock(sslInfo));
+		assertThat(request.getURI().toString()).isEqualTo("/test");
+	}
+
 	@ParameterizedTest(name = "[{index}] {0}")
 	@MethodSource
 	void httpMethodNotNullOrEmpty(ThrowingCallable callable) {
diff --git a/spring-web/src/testFixtures/java/org/springframework/web/testfixture/http/server/reactive/MockServerHttpRequest.java b/spring-web/src/testFixtures/java/org/springframework/web/testfixture/http/server/reactive/MockServerHttpRequest.java
index 81613dcc681..00c825d2b94 100644
--- a/spring-web/src/testFixtures/java/org/springframework/web/testfixture/http/server/reactive/MockServerHttpRequest.java
+++ b/spring-web/src/testFixtures/java/org/springframework/web/testfixture/http/server/reactive/MockServerHttpRequest.java
@@ -258,7 +258,7 @@ public final class MockServerHttpRequest extends AbstractServerHttpRequest {
 		/**
 		 * Set SSL session information and certificates.
 		 */
-		void sslInfo(SslInfo sslInfo);
+		B sslInfo(SslInfo sslInfo);
 
 		/**
 		 * Add one or more cookies.
@@ -458,8 +458,9 @@ public final class MockServerHttpRequest extends AbstractServerHttpRequest {
 		}
 
 		@Override
-		public void sslInfo(SslInfo sslInfo) {
+		public BodyBuilder sslInfo(SslInfo sslInfo) {
 			this.sslInfo = sslInfo;
+			return this;
 		}
 
 		@Override