diff --git a/extensions/vertx-http/deployment/src/test/java/io/quarkus/vertx/http/cors/CORSHandlerTestCase.java b/extensions/vertx-http/deployment/src/test/java/io/quarkus/vertx/http/cors/CORSHandlerTestCase.java
index d099842238f66..839d63e15e20b 100644
--- a/extensions/vertx-http/deployment/src/test/java/io/quarkus/vertx/http/cors/CORSHandlerTestCase.java
+++ b/extensions/vertx-http/deployment/src/test/java/io/quarkus/vertx/http/cors/CORSHandlerTestCase.java
@@ -22,7 +22,7 @@ public class CORSHandlerTestCase {
     public void corsPreflightTestServlet() {
         String origin = "http://custom.origin.quarkus";
         String methods = "GET,POST";
-        String headers = "X-Custom";
+        String headers = "X-Custom, content-type";
         given().header("Origin", origin)
                 .header("Access-Control-Request-Method", methods)
                 .header("Access-Control-Request-Headers", headers)
@@ -40,7 +40,7 @@ public void corsPreflightTestServlet() {
     public void corsNoPreflightTestServlet() {
         String origin = "http://custom.origin.quarkus";
         String methods = "GET,POST";
-        String headers = "X-Custom";
+        String headers = "x-custom, CONTENT-TYPE";
         given().header("Origin", origin)
                 .header("Access-Control-Request-Method", methods)
                 .header("Access-Control-Request-Headers", headers)
diff --git a/extensions/vertx-http/deployment/src/test/resources/conf/cors-config.properties b/extensions/vertx-http/deployment/src/test/resources/conf/cors-config.properties
index d9a2687cc383d..f202ef1064bf6 100644
--- a/extensions/vertx-http/deployment/src/test/resources/conf/cors-config.properties
+++ b/extensions/vertx-http/deployment/src/test/resources/conf/cors-config.properties
@@ -2,3 +2,4 @@ quarkus.http.cors=true
 # whitespaces added to test that they are not taken into account config is parsed
 quarkus.http.cors.methods=GET, OPTIONS, POST
 quarkus.http.cors.access-control-allow-credentials=true
+quarkus.http.cors.access-control-allow-headers=x-custom,CONTENT-TYPE