1 files changed, 3 insertions, 5 deletions
diff --git a/container-core/src/test/java/com/yahoo/container/handler/metrics/PrometheusV1HandlerTest.java b/container-core/src/test/java/com/yahoo/container/handler/metrics/PrometheusV1HandlerTest.java
index e206188dcd8..9e0f9685328 100644
--- a/container-core/src/test/java/com/yahoo/container/handler/metrics/PrometheusV1HandlerTest.java
+++ b/container-core/src/test/java/com/yahoo/container/handler/metrics/PrometheusV1HandlerTest.java
@@ -1,8 +1,8 @@
 // Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.container.handler.metrics;
 
+import ai.vespa.json.Jackson;
 import com.fasterxml.jackson.databind.JsonNode;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.github.tomakehurst.wiremock.junit5.WireMockExtension;
 import com.yahoo.container.jdisc.RequestHandlerTestDriver;
@@ -28,8 +28,6 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
  */
 public class PrometheusV1HandlerTest {
 
-    private static final ObjectMapper jsonMapper = new ObjectMapper();
-
     private static final String URI_BASE = "http://localhost";
 
     private static final String V1_URI = URI_BASE + PrometheusV1Handler.V1_PATH;
@@ -76,7 +74,7 @@ public class PrometheusV1HandlerTest {
     @Test
     void v1_response_contains_values_uri() throws Exception {
         String response = testDriver.sendRequest(V1_URI).readAll();
-        JsonNode root = jsonMapper.readTree(response);
+        JsonNode root = Jackson.mapper().readTree(response);
         assertTrue(root.has("resources"));
 
         ArrayNode resources = (ArrayNode) root.get("resources");
@@ -96,7 +94,7 @@ public class PrometheusV1HandlerTest {
     @Test
     void invalid_path_yields_error_response() throws Exception {
         String response = testDriver.sendRequest(V1_URI + "/invalid").readAll();
-        JsonNode root = jsonMapper.readTree(response);
+        JsonNode root = Jackson.mapper().readTree(response);
         assertTrue(root.has("error"));
         assertTrue(root.get("error").textValue().startsWith("No content"));
     }