diff --git a/backend/src/main/java/io/metersphere/api/dto/definition/request/sampler/MsHTTPSamplerProxy.java b/backend/src/main/java/io/metersphere/api/dto/definition/request/sampler/MsHTTPSamplerProxy.java
index 98be2e11e7..5e28698ccb 100644
--- a/backend/src/main/java/io/metersphere/api/dto/definition/request/sampler/MsHTTPSamplerProxy.java
+++ b/backend/src/main/java/io/metersphere/api/dto/definition/request/sampler/MsHTTPSamplerProxy.java
@@ -294,7 +294,7 @@ public class MsHTTPSamplerProxy extends MsTestElement {
                         sampler.setPath(url);
                     }
                     if (StringUtils.isNotEmpty(this.getPort()) && this.getPort().startsWith("${")) {
-                        url.replaceAll(this.getPort(), "10990");
+                        url = url.replaceAll(this.getPort(), "10990");
                     }
                     try {
                         URL urlObject = new URL(url);