diff --git a/java/ql/src/semmle/code/java/frameworks/JaxWS.qll b/java/ql/src/semmle/code/java/frameworks/JaxWS.qll
index 9e6ef2c1dfc..9e071d1fba6 100644
--- a/java/ql/src/semmle/code/java/frameworks/JaxWS.qll
+++ b/java/ql/src/semmle/code/java/frameworks/JaxWS.qll
@@ -283,7 +283,10 @@ class MessageBodyReaderRead extends Method {
   }
 }
 
-private string getContentTypeString(Expr e) {
+/**
+ * Gets a constant content-type described by expression `e` (either a string constant or a Jax-RS MediaType field access).
+ */
+string getContentTypeString(Expr e) {
   result = e.(CompileTimeConstantExpr).getStringValue() and
   result != ""
   or
diff --git a/java/ql/test/library-tests/frameworks/JaxWs/JakartaRs1.java b/java/ql/test/library-tests/frameworks/JaxWs/JakartaRs1.java
index 271f3594eb0..14f76bd74d2 100644
--- a/java/ql/test/library-tests/frameworks/JaxWs/JakartaRs1.java
+++ b/java/ql/test/library-tests/frameworks/JaxWs/JakartaRs1.java
@@ -71,7 +71,7 @@ public class JakartaRs1 { // $ RootResourceClass
     @Produces("text/html") // $ ProducesAnnotation=text/html
     @POST
     boolean Post() { // $ ResourceMethod=text/html ResourceMethodOnResourceClass
-      return false;
+      return false; // $ XssSink
     }
 
     @Produces(MediaType.TEXT_PLAIN) // $ ProducesAnnotation=text/plain
diff --git a/java/ql/test/library-tests/frameworks/JaxWs/JaxRs.ql b/java/ql/test/library-tests/frameworks/JaxWs/JaxRs.ql
index fcd150e8cf5..bc4916c217c 100644
--- a/java/ql/test/library-tests/frameworks/JaxWs/JaxRs.ql
+++ b/java/ql/test/library-tests/frameworks/JaxWs/JaxRs.ql
@@ -25,7 +25,8 @@ class JaxRsTest extends InlineExpectationsTest {
       element = resourceMethod.toString() and
       if exists(resourceMethod.getProducesAnnotation())
       then
-        value = resourceMethod.getProducesAnnotation().getADeclaredContentType() and
+        value =
+          getContentTypeString(resourceMethod.getProducesAnnotation().getADeclaredContentTypeExpr()) and
         value != ""
       else
         // Filter out empty strings that stem from using stubs.
@@ -143,7 +144,7 @@ class JaxRsTest extends InlineExpectationsTest {
     exists(JaxRSProducesAnnotation producesAnnotation |
       producesAnnotation.getLocation() = location and
       element = producesAnnotation.toString() and
-      value = producesAnnotation.getADeclaredContentType() and
+      value = getContentTypeString(producesAnnotation.getADeclaredContentTypeExpr()) and
       value != ""
       // Filter out empty strings that stem from using stubs.
       // If we built the test against the real JAR then the field
diff --git a/java/ql/test/library-tests/frameworks/JaxWs/JaxRs1.java b/java/ql/test/library-tests/frameworks/JaxWs/JaxRs1.java
index ba21f36069b..1205b538b6b 100644
--- a/java/ql/test/library-tests/frameworks/JaxWs/JaxRs1.java
+++ b/java/ql/test/library-tests/frameworks/JaxWs/JaxRs1.java
@@ -71,7 +71,7 @@ public class JaxRs1 { // $ RootResourceClass
     @Produces("text/html") // $ ProducesAnnotation=text/html
     @POST
     boolean Post() { // $ ResourceMethod=text/html ResourceMethodOnResourceClass
-      return false;
+      return false; // $ XssSink
     }
 
     @Produces(MediaType.TEXT_PLAIN) // $ ProducesAnnotation=text/plain