Merge branch '6.1.x'

spring-test/src/main/java/org/springframework/test/web/reactive/server/DefaultWebTestClient.java

@@ -71,6 +71,7 @@ import org.springframework.web.util.UriBuilderFactory;
  * @author Rossen Stoyanchev
  * @author Sam Brannen
  * @author Michał Rowicki
+ * @author Sebastien Deleuze
  * @since 5.0
  */
 class DefaultWebTestClient implements WebTestClient {
@@ -506,7 +507,14 @@ class DefaultWebTestClient implements WebTestClient {
 
 		@Override
 		public <T> FluxExchangeResult<T> returnResult(ParameterizedTypeReference<T> elementTypeRef) {
-			Flux<T> body = this.response.bodyToFlux(elementTypeRef);
+			Flux<T> body;
+			if (elementTypeRef.getType().equals(Void.class)) {
+				this.response.releaseBody().block();
+				body = Flux.empty();
+			}
+			else {
+				body = this.response.bodyToFlux(elementTypeRef);
+			}
 			return new FluxExchangeResult<>(this.exchangeResult, body);
 		}