diff --git a/apm-agent-core/src/test/java/co/elastic/apm/agent/impl/context/ServiceResourceTest.java b/apm-agent-core/src/test/java/co/elastic/apm/agent/impl/context/ServiceResourceTest.java
index ceda768f37..7dfad3fd21 100644
--- a/apm-agent-core/src/test/java/co/elastic/apm/agent/impl/context/ServiceResourceTest.java
+++ b/apm-agent-core/src/test/java/co/elastic/apm/agent/impl/context/ServiceResourceTest.java
@@ -31,6 +31,8 @@
 import specs.TestJsonSpec;
 
 import javax.annotation.Nullable;
+import java.net.URI;
+import java.net.URISyntaxException;
 import java.util.Iterator;
 import java.util.Objects;
 import java.util.Spliterator;
@@ -126,13 +128,13 @@ private Span createSpan(JsonNode testCase) {
             }
             JsonNode httpJson = contextJson.get("http");
             if (httpJson != null) {
-                JsonNode urlJson = httpJson.get("url");
-                if (urlJson != null) {
+                String urlValue = getTextValueOrNull(httpJson, "url");
+                if (urlValue != null) {
                     Url url = context.getHttp().getInternalUrl();
-                    url.withHostname(getTextValueOrNull(urlJson, "host"));
-                    JsonNode portJson = urlJson.get("port");
-                    if (portJson != null) {
-                        url.withPort(portJson.intValue());
+                    try {
+                        url.fillFrom(new URI(urlValue));
+                    } catch (URISyntaxException e) {
+                        throw new RuntimeException(e);
                     }
                 }
             }
diff --git a/apm-agent-core/src/test/resources/json-specs/service_resource_inference.json b/apm-agent-core/src/test/resources/json-specs/service_resource_inference.json
index e5ced98a39..12ef6b13e8 100644
--- a/apm-agent-core/src/test/resources/json-specs/service_resource_inference.json
+++ b/apm-agent-core/src/test/resources/json-specs/service_resource_inference.json
@@ -130,10 +130,7 @@
           "type": "elasticsearch"
         },
         "http": {
-          "url": {
-            "host": "my-cluster.com",
-            "port": 9200
-          }
+          "url": "https://my-cluster.com:9200"
         }
       }
     },
@@ -153,10 +150,7 @@
           "body": "Text message"
         },
         "http": {
-          "url": {
-            "host": "my-broker.com",
-            "port": 8888
-          }
+          "url": "https://my-broker.com:8888"
         }
       }
     },
@@ -173,10 +167,7 @@
       "subtype": "http",
       "context": {
         "http": {
-          "url": {
-            "host": "my-cluster.com",
-            "port": 9200
-          }
+          "url": "http://my-cluster.com:9200"
         }
       }
     },
@@ -185,7 +176,7 @@
       "type": "http",
       "name": "my-cluster.com:9200"
     },
-    "failure_message": "If `context.http.url` exists, output should be `${context.http.url.host}:${context.http.url.port}"
+    "failure_message": "If `context.http.url` exists, output should be `${context.http.url}`"
   },
   {
     "span": {
@@ -194,19 +185,16 @@
       "subtype": "http",
       "context": {
         "http": {
-          "url": {
-            "host": "my-cluster.com",
-            "port": -1
-          }
+          "url": "https://my-cluster.com"
         }
       }
     },
-    "expected_resource": "my-cluster.com",
+    "expected_resource": "my-cluster.com:443",
     "expected_service_target": {
       "type": "http",
-      "name": "my-cluster.com"
+      "name": "my-cluster.com:443"
     },
-    "failure_message": "Negative `context.http.url.port` should be omitted from output"
+    "failure_message": "`context.http.url` without an explicit default HTTPS port, output should be reported as `${context.http.url}:443`"
   },
   {
     "span": {
@@ -215,18 +203,16 @@
       "subtype": "http",
       "context": {
         "http": {
-          "url": {
-            "host": "my-cluster.com"
-          }
+          "url": "http://my-cluster.com"
         }
       }
     },
-    "expected_resource": "my-cluster.com",
+    "expected_resource": "my-cluster.com:80",
     "expected_service_target": {
       "type": "http",
-      "name": "my-cluster.com"
+      "name": "my-cluster.com:80"
     },
-    "failure_message": "If `context.http.url.port` does not exist, output should be `${context.http.url.host}`"
+    "failure_message": "`context.http.url` without an explicit default HTTP port, output should be reported as `${context.http.url}:80`"
   },
   {
     "span": {