diff --git a/http/http-minimum-reactive/src/test/java/io/quarkus/ts/http/minimum/reactive/HttpCustomHeadersIT.java b/http/http-minimum-reactive/src/test/java/io/quarkus/ts/http/minimum/reactive/HttpCustomHeadersIT.java
new file mode 100644
index 000000000..4a84fd457
--- /dev/null
+++ b/http/http-minimum-reactive/src/test/java/io/quarkus/ts/http/minimum/reactive/HttpCustomHeadersIT.java
@@ -0,0 +1,25 @@
+package io.quarkus.ts.http.minimum.reactive;
+
+import static io.restassured.RestAssured.given;
+import static org.hamcrest.CoreMatchers.is;
+
+import org.apache.http.HttpStatus;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+
+import io.quarkus.test.scenarios.QuarkusScenario;
+
+@Tag("QUARKUS-1574")
+@QuarkusScenario
+public class HttpCustomHeadersIT {
+
+    @Test
+    public void caseInsensitiveAcceptHeader() {
+        given()
+                .accept("Application/json")
+                .get("/api/hello")
+                .then()
+                .statusCode(HttpStatus.SC_OK)
+                .body("content", is("Hello, World!"));
+    }
+}
diff --git a/http/http-minimum/src/test/java/io/quarkus/ts/http/minimum/HttpCustomHeadersIT.java b/http/http-minimum/src/test/java/io/quarkus/ts/http/minimum/HttpCustomHeadersIT.java
new file mode 100644
index 000000000..6feb1c4f4
--- /dev/null
+++ b/http/http-minimum/src/test/java/io/quarkus/ts/http/minimum/HttpCustomHeadersIT.java
@@ -0,0 +1,25 @@
+package io.quarkus.ts.http.minimum;
+
+import static io.restassured.RestAssured.given;
+import static org.hamcrest.CoreMatchers.is;
+
+import org.apache.http.HttpStatus;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+
+import io.quarkus.test.scenarios.QuarkusScenario;
+
+@Tag("QUARKUS-1574")
+@QuarkusScenario
+public class HttpCustomHeadersIT {
+
+    @Test
+    public void caseInsensitiveAcceptHeader() {
+        given()
+                .accept("Application/json")
+                .get("/api/hello")
+                .then()
+                .statusCode(HttpStatus.SC_OK)
+                .body("content", is("Hello, World!"));
+    }
+}