diff --git a/.github/workflows/ci.yml b/.github/workflows/ci-4.x.yml
similarity index 94%
rename from .github/workflows/ci.yml
rename to .github/workflows/ci-4.x.yml
index ac29e09..469dfd0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci-4.x.yml
@@ -1,13 +1,13 @@
-name: CI
+name: vertx-http-proxy (4.x)
 on:
   push:
     branches:
       - main
-      - '[0-9]+.[0-9]+'
+      - '[0-9]+.[0-9x]+'
   pull_request:
     branches:
       - main
-      - '[0-9]+.[0-9]+'
+      - '[0-9]+.[0-9x]+'
   schedule:
     - cron:  '0 4 * * *'
 jobs:
diff --git a/pom.xml b/pom.xml
index 1895bfc..c86d654 100644
--- a/pom.xml
+++ b/pom.xml
@@ -24,12 +24,12 @@
   </parent>
 
   <artifactId>vertx-http-proxy</artifactId>
-  <version>5.0.0-SNAPSHOT</version>
+  <version>4.4.10-SNAPSHOT</version>
 
   <name>Vert.x Http Proxy</name>
 
   <properties>
-    <stack.version>5.0.0-SNAPSHOT</stack.version>
+    <stack.version>4.4.10-SNAPSHOT</stack.version>
     <fatjar.dir>${project.build.directory}</fatjar.dir>
     <doc.skip>false</doc.skip>
     <jar.manifest>${project.basedir}/src/main/resources/META-INF/MANIFEST.MF</jar.manifest>
diff --git a/src/test/java/io/vertx/httpproxy/ProxyRequestTest.java b/src/test/java/io/vertx/httpproxy/ProxyRequestTest.java
index 390e267..1073d90 100644
--- a/src/test/java/io/vertx/httpproxy/ProxyRequestTest.java
+++ b/src/test/java/io/vertx/httpproxy/ProxyRequestTest.java
@@ -99,11 +99,11 @@ public void testChunkedFrontendRequest(TestContext ctx) {
       req.response().end("Hello World");
     }, ctx.asyncAssertSuccess());
     HttpClient httpClient = vertx.createHttpClient();
-    httpClient
-        .request(HttpMethod.GET, 8080, "localhost", "/somepath")
-        .compose(HttpClientRequest::send)
-        .compose(HttpClientResponse::body)
-        .onComplete(ctx.asyncAssertSuccess());
+    httpClient.request(HttpMethod.GET, 8080, "localhost", "/somepath")
+      .compose(req -> req
+        .send()
+        .compose(HttpClientResponse::body))
+      .onComplete(ctx.asyncAssertSuccess());
   }
 
   @Test
@@ -117,10 +117,13 @@ public void testNonChunkedFrontendRequest(TestContext ctx) {
     }, ctx.asyncAssertSuccess());
     HttpClient httpClient = vertx.createHttpClient();
     httpClient
-        .request(HttpMethod.POST, 8080, "localhost", "/somepath")
-        .compose(req -> req.setChunked(true).send("chunk"))
-        .compose(HttpClientResponse::body)
-        .onComplete(ctx.asyncAssertSuccess());
+      .request(HttpMethod.POST, 8080, "localhost", "/somepath")
+      .compose(req -> req
+        .setChunked(true)
+        .send("chunk")
+        .andThen(ctx.asyncAssertSuccess(resp -> ctx.assertEquals(200, resp.statusCode())))
+        .compose(HttpClientResponse::end))
+      .onComplete(ctx.asyncAssertSuccess());
   }
 
   @Ignore
@@ -132,9 +135,14 @@ public void testIllegalTransferEncodingBackendResponse(TestContext ctx) {
         "connection: close\r\n" +
         "\r\n"), ctx.asyncAssertSuccess());
     HttpClient httpClient = vertx.createHttpClient();
-    httpClient.request(HttpMethod.GET, 8080, "localhost", "/somepath")
-        .compose(req -> req.send().compose(HttpClientResponse::body))
-        .onComplete(ctx.asyncAssertSuccess());
+    httpClient
+      .request(HttpMethod.POST, 8080, "localhost", "/somepath")
+      .compose(req -> req
+        .setChunked(true)
+        .send("chunk")
+        .andThen(ctx.asyncAssertSuccess(resp -> ctx.assertEquals(200, resp.statusCode())))
+        .compose(HttpClientResponse::end))
+      .onComplete(ctx.asyncAssertSuccess());
   }
 
   @Test