diff --git a/spring-test/src/main/java/org/springframework/test/web/reactive/server/HeaderAssertions.java b/spring-test/src/main/java/org/springframework/test/web/reactive/server/HeaderAssertions.java
index f49a6a7c8e..8de252143f 100644
--- a/spring-test/src/main/java/org/springframework/test/web/reactive/server/HeaderAssertions.java
+++ b/spring-test/src/main/java/org/springframework/test/web/reactive/server/HeaderAssertions.java
@@ -66,7 +66,7 @@ public class HeaderAssertions {
 			fail(getMessage(name) + " not found");
 		}
 		boolean match = Pattern.compile(pattern).matcher(value).matches();
-		String message = getMessage(name) + "=\'" + value + "\' does not match \'" + pattern + "\'";
+		String message = getMessage(name) + "=[" + value + "] does not match [" + pattern + "]";
 		this.exchangeResult.assertWithDiagnostics(() -> assertTrue(message, match));
 		return this.responseSpec;
 	}
@@ -114,14 +114,12 @@ public class HeaderAssertions {
 	}
 
 
-	// Private methods
-
 	private HttpHeaders getHeaders() {
 		return this.exchangeResult.getResponseHeaders();
 	}
 
 	private String getMessage(String headerName) {
-		return "Response header [" + headerName + "]";
+		return "Response header '" + headerName + "'";
 	}
 
 	private WebTestClient.ResponseSpec assertHeader(String name, @Nullable Object expected, @Nullable Object actual) {
diff --git a/spring-test/src/main/java/org/springframework/test/web/reactive/server/JsonPathAssertions.java b/spring-test/src/main/java/org/springframework/test/web/reactive/server/JsonPathAssertions.java
index accd3a3017..d32bc34340 100644
--- a/spring-test/src/main/java/org/springframework/test/web/reactive/server/JsonPathAssertions.java
+++ b/spring-test/src/main/java/org/springframework/test/web/reactive/server/JsonPathAssertions.java
@@ -24,6 +24,7 @@ import org.springframework.test.util.JsonPathExpectationsHelper;
  * @author Rossen Stoyanchev
  * @since 5.0
  * @see <a href="https://github.com/jayway/JsonPath">https://github.com/jayway/JsonPath</a>
+ * @see JsonPathExpectationsHelper
  */
 public class JsonPathAssertions {
 
diff --git a/spring-test/src/main/java/org/springframework/test/web/reactive/server/StatusAssertions.java b/spring-test/src/main/java/org/springframework/test/web/reactive/server/StatusAssertions.java
index 375bd0f928..b47b8ef68e 100644
--- a/spring-test/src/main/java/org/springframework/test/web/reactive/server/StatusAssertions.java
+++ b/spring-test/src/main/java/org/springframework/test/web/reactive/server/StatusAssertions.java
@@ -18,7 +18,7 @@ package org.springframework.test.web.reactive.server;
 
 import org.springframework.http.HttpStatus;
 
-import static org.springframework.test.util.AssertionErrors.assertEquals;
+import static org.springframework.test.util.AssertionErrors.*;
 
 /**
  * Assertions on the response status.
@@ -134,6 +134,14 @@ public class StatusAssertions {
 		return assertStatusAndReturn(HttpStatus.UNAUTHORIZED);
 	}
 
+	/**
+	 * Assert the response status code is {@code HttpStatus.FORBIDDEN} (403).
+	 * @since 5.0.2
+	 */
+	public WebTestClient.ResponseSpec isForbidden() {
+		return assertStatusAndReturn(HttpStatus.FORBIDDEN);
+	}
+
 	/**
 	 * Assert the response status code is {@code HttpStatus.NOT_FOUND} (404).
 	 */
@@ -187,7 +195,6 @@ public class StatusAssertions {
 		return assertSeriesAndReturn(expected);
 	}
 
-	// Private methods
 
 	private WebTestClient.ResponseSpec assertStatusAndReturn(HttpStatus expected) {
 		HttpStatus actual = this.exchangeResult.getStatus();
@@ -197,8 +204,8 @@ public class StatusAssertions {
 
 	private WebTestClient.ResponseSpec assertSeriesAndReturn(HttpStatus.Series expected) {
 		HttpStatus status = this.exchangeResult.getStatus();
-		String message = "Range for response status value " + status;
-		this.exchangeResult.assertWithDiagnostics(() -> assertEquals(message, expected, status.series()));
+		this.exchangeResult.assertWithDiagnostics(() ->
+				assertEquals("Range for response status value " + status, expected, status.series()));
 		return this.responseSpec;
 	}
 
diff --git a/spring-test/src/main/java/org/springframework/test/web/reactive/server/WebTestClient.java b/spring-test/src/main/java/org/springframework/test/web/reactive/server/WebTestClient.java
index 1462468fde..d8e72697b5 100644
--- a/spring-test/src/main/java/org/springframework/test/web/reactive/server/WebTestClient.java
+++ b/spring-test/src/main/java/org/springframework/test/web/reactive/server/WebTestClient.java
@@ -75,6 +75,9 @@ import org.springframework.web.util.UriBuilderFactory;
  *
  * @author Rossen Stoyanchev
  * @since 5.0
+ * @see StatusAssertions
+ * @see HeaderAssertions
+ * @see JsonPathAssertions
  */
 public interface WebTestClient {
 
@@ -154,7 +157,7 @@ public interface WebTestClient {
 	WebTestClient mutateWith(WebTestClientConfigurer configurer);
 
 
-	// Static, factory methods
+	// Static factory methods
 
 	/**
 	 * Use this server setup to test one `@Controller` at a time.
@@ -261,9 +264,9 @@ public interface WebTestClient {
 		 * Shortcut to build the test client.
 		 */
 		WebTestClient build();
-
 	}
 
+
 	/**
 	 * Specification for customizing controller configuration equivalent to, and
 	 * internally delegating to, a {@link WebFluxConfigurer}.
@@ -324,9 +327,9 @@ public interface WebTestClient {
 		 * @see WebFluxConfigurer#configureViewResolvers
 		 */
 		ControllerSpec viewResolvers(Consumer<ViewResolverRegistry> consumer);
-
 	}
 
+
 	/**
 	 * Specification for customizing router function configuration.
 	 */
@@ -336,9 +339,9 @@ public interface WebTestClient {
 		 * Configure handler strategies.
 		 */
 		RouterFunctionSpec handlerStrategies(HandlerStrategies handlerStrategies);
-
 	}
 
+
 	/**
 	 * Steps for customizing the {@link WebClient} used to test with
 	 * internally delegating to a {@link WebClient.Builder}.
@@ -433,7 +436,6 @@ public interface WebTestClient {
 		 * Build the {@link WebTestClient} instance.
 		 */
 		WebTestClient build();
-
 	}
 
 
@@ -470,9 +472,9 @@ public interface WebTestClient {
 		 * @return spec to add headers or perform the exchange
 		 */
 		S uri(Function<UriBuilder, URI> uriFunction);
-
 	}
 
+
 	/**
 	 * Specification for adding request headers and performing an exchange.
 	 */
@@ -570,9 +572,9 @@ public interface WebTestClient {
 		 * @return spec for decoding the response
 		 */
 		ResponseSpec exchange();
-
 	}
 
+
 	interface RequestBodySpec extends RequestHeadersSpec<RequestBodySpec> {
 		/**
 		 * Set the length of the body in bytes, as specified by the
@@ -617,13 +619,13 @@ public interface WebTestClient {
 		 * @return a {@code Mono} with the response
 		 */
 		RequestHeadersSpec<?> syncBody(Object body);
-
 	}
 
-	interface RequestHeadersUriSpec<S extends RequestHeadersSpec<S>>
-			extends UriSpec<S>, RequestHeadersSpec<S> {
+
+	interface RequestHeadersUriSpec<S extends RequestHeadersSpec<S>> extends UriSpec<S>, RequestHeadersSpec<S> {
 	}
 
+
 	interface RequestBodyUriSpec extends RequestBodySpec, RequestHeadersUriSpec<RequestBodySpec> {
 	}
 
@@ -698,6 +700,7 @@ public interface WebTestClient {
 		<T> FluxExchangeResult<T> returnResult(ParameterizedTypeReference<T> elementType);
 	}
 
+
 	/**
 	 * Spec for expectations on the response body decoded to a single Object.
 	 */
@@ -718,9 +721,9 @@ public interface WebTestClient {
 		 * decoded response content.
 		 */
 		EntityExchangeResult<B> returnResult();
-
 	}
 
+
 	/**
 	 * Spec for expectations on the response body decoded to a List.
 	 */
@@ -745,9 +748,9 @@ public interface WebTestClient {
 		 */
 		@SuppressWarnings("unchecked")
 		ListBodySpec<E> doesNotContain(E... elements);
-
 	}
 
+
 	/**
 	 * Spec for expectations on the response body content.
 	 */
@@ -791,7 +794,6 @@ public interface WebTestClient {
 		 * raw response content.
 		 */
 		EntityExchangeResult<byte[]> returnResult();
-
 	}
 
 }
diff --git a/spring-test/src/test/java/org/springframework/test/web/reactive/server/HeaderAssertionsTests.java b/spring-test/src/test/java/org/springframework/test/web/reactive/server/HeaderAssertionTests.java
similarity index 87%
rename from spring-test/src/test/java/org/springframework/test/web/reactive/server/HeaderAssertionsTests.java
rename to spring-test/src/test/java/org/springframework/test/web/reactive/server/HeaderAssertionTests.java
index 30b3afdeb9..e9dc6d0d7a 100644
--- a/spring-test/src/test/java/org/springframework/test/web/reactive/server/HeaderAssertionsTests.java
+++ b/spring-test/src/test/java/org/springframework/test/web/reactive/server/HeaderAssertionTests.java
@@ -30,10 +30,8 @@ import org.springframework.http.MediaType;
 import org.springframework.mock.http.client.reactive.MockClientHttpRequest;
 import org.springframework.mock.http.client.reactive.MockClientHttpResponse;
 
-import static junit.framework.TestCase.assertNotNull;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
-import static org.mockito.Mockito.mock;
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
 
 /**
  * Unit tests for {@link HeaderAssertions}.
@@ -41,11 +39,10 @@ import static org.mockito.Mockito.mock;
  * @author Rossen Stoyanchev
  * @since 5.0
  */
-public class HeaderAssertionsTests {
-
+public class HeaderAssertionTests {
 
 	@Test
-	public void valueEquals() throws Exception {
+	public void valueEquals() {
 		HttpHeaders headers = new HttpHeaders();
 		headers.add("foo", "bar");
 		HeaderAssertions assertions = headerAssertions(headers);
@@ -79,7 +76,7 @@ public class HeaderAssertionsTests {
 	}
 
 	@Test
-	public void valueEqualsWithMultipeValues() throws Exception {
+	public void valueEqualsWithMultipeValues() {
 		HttpHeaders headers = new HttpHeaders();
 		headers.add("foo", "bar");
 		headers.add("foo", "baz");
@@ -107,7 +104,7 @@ public class HeaderAssertionsTests {
 	}
 
 	@Test
-	public void valueMatches() throws Exception {
+	public void valueMatches() {
 		HttpHeaders headers = new HttpHeaders();
 		headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
 		HeaderAssertions assertions = headerAssertions(headers);
@@ -122,14 +119,13 @@ public class HeaderAssertionsTests {
 		catch (AssertionError error) {
 			Throwable cause = error.getCause();
 			assertNotNull(cause);
-			assertEquals("Response header [Content-Type]='application/json;charset=UTF-8' " +
-					"does not match '.*ISO-8859-1.*'", cause.getMessage());
+			assertEquals("Response header 'Content-Type'=[application/json;charset=UTF-8] " +
+					"does not match [.*ISO-8859-1.*]", cause.getMessage());
 		}
 	}
 
 	@Test
-	public void cacheControl() throws Exception {
-
+	public void cacheControl() {
 		CacheControl control = CacheControl.maxAge(1, TimeUnit.HOURS).noTransform();
 
 		HttpHeaders headers = new HttpHeaders();
@@ -148,6 +144,7 @@ public class HeaderAssertionsTests {
 		}
 	}
 
+
 	private HeaderAssertions headerAssertions(HttpHeaders responseHeaders) {
 		MockClientHttpRequest request = new MockClientHttpRequest(HttpMethod.GET, URI.create("/"));
 		MockClientHttpResponse response = new MockClientHttpResponse(HttpStatus.OK);
diff --git a/spring-test/src/test/java/org/springframework/test/web/reactive/server/StatusAssertionTests.java b/spring-test/src/test/java/org/springframework/test/web/reactive/server/StatusAssertionTests.java
index d688d041f2..ccd69c0619 100644
--- a/spring-test/src/test/java/org/springframework/test/web/reactive/server/StatusAssertionTests.java
+++ b/spring-test/src/test/java/org/springframework/test/web/reactive/server/StatusAssertionTests.java
@@ -26,8 +26,8 @@ import org.springframework.http.HttpStatus;
 import org.springframework.mock.http.client.reactive.MockClientHttpRequest;
 import org.springframework.mock.http.client.reactive.MockClientHttpResponse;
 
-import static org.junit.Assert.fail;
-import static org.mockito.Mockito.mock;
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
 
 /**
  * Unit tests for {@link StatusAssertions}.
@@ -38,8 +38,7 @@ import static org.mockito.Mockito.mock;
 public class StatusAssertionTests {
 
 	@Test
-	public void isEqualTo() throws Exception {
-
+	public void isEqualTo() {
 		StatusAssertions assertions = statusAssertions(HttpStatus.CONFLICT);
 
 		// Success
@@ -64,8 +63,7 @@ public class StatusAssertionTests {
 	}
 
 	@Test
-	public void reasonEquals() throws Exception {
-
+	public void reasonEquals() {
 		StatusAssertions assertions = statusAssertions(HttpStatus.CONFLICT);
 
 		// Success
@@ -81,7 +79,7 @@ public class StatusAssertionTests {
 	}
 
 	@Test
-	public void statusSerius1xx() throws Exception {
+	public void statusSerius1xx() {
 		StatusAssertions assertions = statusAssertions(HttpStatus.CONTINUE);
 
 		// Success
@@ -97,7 +95,7 @@ public class StatusAssertionTests {
 	}
 
 	@Test
-	public void statusSerius2xx() throws Exception {
+	public void statusSerius2xx() {
 		StatusAssertions assertions = statusAssertions(HttpStatus.OK);
 
 		// Success
@@ -113,7 +111,7 @@ public class StatusAssertionTests {
 	}
 
 	@Test
-	public void statusSerius3xx() throws Exception {
+	public void statusSerius3xx() {
 		StatusAssertions assertions = statusAssertions(HttpStatus.PERMANENT_REDIRECT);
 
 		// Success
@@ -129,7 +127,7 @@ public class StatusAssertionTests {
 	}
 
 	@Test
-	public void statusSerius4xx() throws Exception {
+	public void statusSerius4xx() {
 		StatusAssertions assertions = statusAssertions(HttpStatus.BAD_REQUEST);
 
 		// Success
@@ -145,7 +143,7 @@ public class StatusAssertionTests {
 	}
 
 	@Test
-	public void statusSerius5xx() throws Exception {
+	public void statusSerius5xx() {
 		StatusAssertions assertions = statusAssertions(HttpStatus.INTERNAL_SERVER_ERROR);
 
 		// Success