diff --git a/spring-test/src/main/java/org/springframework/mock/web/MockHttpServletRequest.java b/spring-test/src/main/java/org/springframework/mock/web/MockHttpServletRequest.java
index 870ada7d5a..3c47048d56 100644
--- a/spring-test/src/main/java/org/springframework/mock/web/MockHttpServletRequest.java
+++ b/spring-test/src/main/java/org/springframework/mock/web/MockHttpServletRequest.java
@@ -1103,13 +1103,18 @@ public class MockHttpServletRequest implements HttpServletRequest {
 
 	@Override
 	public StringBuffer getRequestURL() {
-		StringBuffer url = new StringBuffer(this.scheme).append("://").append(this.serverName);
-		if (this.serverPort > 0 && ((HTTP.equalsIgnoreCase(this.scheme) && this.serverPort != 80) ||
-				(HTTPS.equalsIgnoreCase(this.scheme) && this.serverPort != 443))) {
-			url.append(':').append(this.serverPort);
+		String scheme = getScheme();
+		String server = getServerName();
+		int port = getServerPort();
+		String uri = getRequestURI();
+
+		StringBuffer url = new StringBuffer(scheme).append("://").append(server);
+		if (port > 0 && ((HTTP.equalsIgnoreCase(scheme) && port != 80) ||
+				(HTTPS.equalsIgnoreCase(scheme) && port != 443))) {
+			url.append(':').append(port);
 		}
-		if (StringUtils.hasText(getRequestURI())) {
-			url.append(getRequestURI());
+		if (StringUtils.hasText(uri)) {
+			url.append(uri);
 		}
 		return url;
 	}
@@ -1219,12 +1224,12 @@ public class MockHttpServletRequest implements HttpServletRequest {
 	}
 
 	@Override
-	public Part getPart(String name) throws IOException, IllegalStateException, ServletException {
+	public Part getPart(String name) throws IOException, ServletException {
 		return this.parts.getFirst(name);
 	}
 
 	@Override
-	public Collection<Part> getParts() throws IOException, IllegalStateException, ServletException {
+	public Collection<Part> getParts() throws IOException, ServletException {
 		List<Part> result = new LinkedList<Part>();
 		for (List<Part> list : this.parts.values()) {
 			result.addAll(list);
diff --git a/spring-test/src/test/java/org/springframework/mock/web/MockHttpServletRequestTests.java b/spring-test/src/test/java/org/springframework/mock/web/MockHttpServletRequestTests.java
index 343c667039..e3400931d3 100644
--- a/spring-test/src/test/java/org/springframework/mock/web/MockHttpServletRequestTests.java
+++ b/spring-test/src/test/java/org/springframework/mock/web/MockHttpServletRequestTests.java
@@ -146,7 +146,7 @@ public class MockHttpServletRequestTests {
 	}
 
 	@Test
-	public void httpHeaderNameCasingIsPreserved() throws Exception {
+	public void httpHeaderNameCasingIsPreserved() {
 		String headerName = "Header1";
 		request.addHeader(headerName, "value1");
 		Enumeration<String> requestHeaders = request.getHeaderNames();
@@ -360,6 +360,22 @@ public class MockHttpServletRequestTests {
 		assertEquals("http://localhost", requestURL.toString());
 	}
 
+	@Test  // SPR-16138
+	public void getRequestURLWithHostHeader() {
+		String testServer = "test.server";
+		request.addHeader(HOST, testServer);
+		StringBuffer requestURL = request.getRequestURL();
+		assertEquals("http://" + testServer, requestURL.toString());
+	}
+
+	@Test  // SPR-16138
+	public void getRequestURLWithHostHeaderAndPort() {
+		String testServer = "test.server:9999";
+		request.addHeader(HOST, testServer);
+		StringBuffer requestURL = request.getRequestURL();
+		assertEquals("http://" + testServer, requestURL.toString());
+	}
+
 	@Test
 	public void getRequestURLWithNullRequestUri() {
 		request.setRequestURI(null);
@@ -415,43 +431,44 @@ public class MockHttpServletRequestTests {
 	}
 
 	@Test
-	public void httpHeaderDate() throws Exception {
+	public void httpHeaderDate() {
 		Date date = new Date();
 		request.addHeader(IF_MODIFIED_SINCE, date);
 		assertEquals(date.getTime(), request.getDateHeader(IF_MODIFIED_SINCE));
 	}
 
 	@Test
-	public void httpHeaderTimestamp() throws Exception {
+	public void httpHeaderTimestamp() {
 		long timestamp = new Date().getTime();
 		request.addHeader(IF_MODIFIED_SINCE, timestamp);
 		assertEquals(timestamp, request.getDateHeader(IF_MODIFIED_SINCE));
 	}
 
 	@Test
-	public void httpHeaderRfcFormatedDate() throws Exception {
+	public void httpHeaderRfcFormatedDate() {
 		request.addHeader(IF_MODIFIED_SINCE, "Tue, 21 Jul 2015 10:00:00 GMT");
 		assertEquals(1437472800000L, request.getDateHeader(IF_MODIFIED_SINCE));
 	}
 
 	@Test
-	public void httpHeaderFirstVariantFormatedDate() throws Exception {
+	public void httpHeaderFirstVariantFormatedDate() {
 		request.addHeader(IF_MODIFIED_SINCE, "Tue, 21-Jul-15 10:00:00 GMT");
 		assertEquals(1437472800000L, request.getDateHeader(IF_MODIFIED_SINCE));
 	}
 
 	@Test
-	public void httpHeaderSecondVariantFormatedDate() throws Exception {
+	public void httpHeaderSecondVariantFormatedDate() {
 		request.addHeader(IF_MODIFIED_SINCE, "Tue Jul 21 10:00:00 2015");
 		assertEquals(1437472800000L, request.getDateHeader(IF_MODIFIED_SINCE));
 	}
 
 	@Test(expected = IllegalArgumentException.class)
-	public void httpHeaderFormatedDateError() throws Exception {
+	public void httpHeaderFormatedDateError() {
 		request.addHeader(IF_MODIFIED_SINCE, "This is not a date");
 		request.getDateHeader(IF_MODIFIED_SINCE);
 	}
 
+
 	private void assertEqualEnumerations(Enumeration<?> enum1, Enumeration<?> enum2) {
 		assertNotNull(enum1);
 		assertNotNull(enum2);
diff --git a/spring-web/src/test/java/org/springframework/mock/web/test/MockHttpServletRequest.java b/spring-web/src/test/java/org/springframework/mock/web/test/MockHttpServletRequest.java
index e44bd0873b..c1b9934515 100644
--- a/spring-web/src/test/java/org/springframework/mock/web/test/MockHttpServletRequest.java
+++ b/spring-web/src/test/java/org/springframework/mock/web/test/MockHttpServletRequest.java
@@ -1103,13 +1103,18 @@ public class MockHttpServletRequest implements HttpServletRequest {
 
 	@Override
 	public StringBuffer getRequestURL() {
-		StringBuffer url = new StringBuffer(this.scheme).append("://").append(this.serverName);
-		if (this.serverPort > 0 && ((HTTP.equalsIgnoreCase(this.scheme) && this.serverPort != 80) ||
-				(HTTPS.equalsIgnoreCase(this.scheme) && this.serverPort != 443))) {
-			url.append(':').append(this.serverPort);
+		String scheme = getScheme();
+		String server = getServerName();
+		int port = getServerPort();
+		String uri = getRequestURI();
+
+		StringBuffer url = new StringBuffer(scheme).append("://").append(server);
+		if (port > 0 && ((HTTP.equalsIgnoreCase(scheme) && port != 80) ||
+				(HTTPS.equalsIgnoreCase(scheme) && port != 443))) {
+			url.append(':').append(port);
 		}
-		if (StringUtils.hasText(getRequestURI())) {
-			url.append(getRequestURI());
+		if (StringUtils.hasText(uri)) {
+			url.append(uri);
 		}
 		return url;
 	}
@@ -1219,12 +1224,12 @@ public class MockHttpServletRequest implements HttpServletRequest {
 	}
 
 	@Override
-	public Part getPart(String name) throws IOException, IllegalStateException, ServletException {
+	public Part getPart(String name) throws IOException, ServletException {
 		return this.parts.getFirst(name);
 	}
 
 	@Override
-	public Collection<Part> getParts() throws IOException, IllegalStateException, ServletException {
+	public Collection<Part> getParts() throws IOException, ServletException {
 		List<Part> result = new LinkedList<Part>();
 		for (List<Part> list : this.parts.values()) {
 			result.addAll(list);