diff --git a/customer-work/pom.xml b/customer-work/pom.xml
index 62ac3e8..4c62bf0 100644
--- a/customer-work/pom.xml
+++ b/customer-work/pom.xml
@@ -51,6 +51,11 @@
             <artifactId>postgresql</artifactId>
             <scope>runtime</scope>
         </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
 
         <!-- Flowable Inspect -->
         <!-- ======= -->
@@ -66,20 +71,17 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>com.h2database</groupId>
-            <artifactId>h2</artifactId>
-            <scope>runtime</scope>
-        </dependency>
         <dependency>
             <groupId>com.github.wnameless.json</groupId>
             <artifactId>json-flattener</artifactId>
             <version>0.16.6</version>
+            <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>com.icegreen</groupId>
             <artifactId>greenmail</artifactId>
             <version>2.1.8</version>
+            <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.poi</groupId>
@@ -87,7 +89,6 @@
             <scope>test</scope>
         </dependency>
 
-
     </dependencies>
 
     <build>
diff --git a/customer-work/src/main/java/com/customer/work/service/JsonUtils.java b/customer-work/src/main/java/com/customer/work/service/JsonUtils.java
deleted file mode 100644
index 66319fb..0000000
--- a/customer-work/src/main/java/com/customer/work/service/JsonUtils.java
+++ /dev/null
@@ -1,107 +0,0 @@
-package com.customer.work.service;
-
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.core.type.TypeReference;
-import com.fasterxml.jackson.databind.JsonNode;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.SerializationFeature;
-import com.fasterxml.jackson.databind.node.ArrayNode;
-import com.fasterxml.jackson.databind.node.ObjectNode;
-import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
-import com.github.wnameless.json.flattener.JsonFlattener;
-import com.github.wnameless.json.unflattener.JsonUnflattener;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.stereotype.Component;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.List;
-import java.util.Map;
-
-@Component
-public class JsonUtils {
-
-    protected static final Logger LOGGER = LoggerFactory.getLogger(JsonUtils.class);
-    protected final ObjectMapper objectMapper;
-    protected final JavaTimeModule javaTimeModule;
-
-    public JsonUtils(ObjectMapper objectMapper) {
-        this.objectMapper = objectMapper;
-        this.javaTimeModule = new JavaTimeModule();
-
-        // Enable ObjectMapper for handling Instant as string
-        this.objectMapper.registerModule(javaTimeModule);
-        this.objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
-    }
-
-    public JsonNode convertListToJsonNode(List<Object> list) {
-        return objectMapper.valueToTree(list);
-    }
-
-    public JsonNode convertMapToJsonNode(Map<String, Object> map) {
-        return objectMapper.valueToTree(map);
-    }
-
-    public Map<String, Object> convertJsonNodeToMap(JsonNode jsonNode) {
-        return objectMapper.convertValue(jsonNode, new TypeReference<>() {});
-    }
-
-    public Map<String, Object> flatten(Object payload) {
-        try {
-            return JsonFlattener.flattenAsMap(objectMapper.writeValueAsString(payload));
-        } catch (JsonProcessingException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    public Map<String, Object> unflatten(Map<String, Object> flatVars) {
-        try {
-            return objectMapper.readValue(JsonUnflattener.unflatten(flatVars), new TypeReference<>() {});
-        } catch (JsonProcessingException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    public JsonNode convertJsonStringToJsonNode(String jsonString) {
-        try {
-            return objectMapper.readTree(jsonString);
-        } catch (IOException e) {
-            e.printStackTrace();
-            return null;
-        }
-    }
-
-    public Map<String, Object> convertObjectNodeToMap(ObjectNode objectNode) {
-        return objectMapper.convertValue(objectNode, new TypeReference<>() {});
-    }
-
-    public ObjectNode getEmptyObjectNode() {
-        return objectMapper.createObjectNode();
-    }
-
-    public ObjectNode loadObjectNodeFromFile(String path) {
-        try {
-            return (ObjectNode) this.objectMapper.readTree(new File(path));
-        } catch (IOException e) {
-            LOGGER.debug(e.getMessage());
-            return null;
-        }
-    }
-
-    public ArrayNode convertObjectToArrayNode(Object object) {
-        if (object == null) {
-            LOGGER.debug("{}: Argument is null", this.getClass().getName());
-            return null;
-        }
-        String obyTypeName = object.getClass().getName();
-        if (obyTypeName.equals("java.util.Collections$EmptyList") || obyTypeName.equals("java.util.ArrayList")) {
-            return objectMapper.convertValue(object, ArrayNode.class);
-        } else if (obyTypeName.equals("com.fasterxml.jackson.databind.node.ArrayNode")) {
-            return (ArrayNode) object;
-        } else {
-            LOGGER.debug("{}: {} is not implemented}", this.getClass().getName(), obyTypeName);
-            return null;
-        }
-    }
-}
diff --git a/customer-work/src/test/java/com/customer/work/model/FlowableModelTestUtils.java b/customer-work/src/test/java/com/customer/work/model/FlowableModelTestUtils.java
index c395ad1..949d8bb 100644
--- a/customer-work/src/test/java/com/customer/work/model/FlowableModelTestUtils.java
+++ b/customer-work/src/test/java/com/customer/work/model/FlowableModelTestUtils.java
@@ -1,13 +1,19 @@
 package com.customer.work.model;
 
-import com.customer.work.service.JsonUtils;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
 import com.flowable.audit.api.AuditService;
 import com.flowable.audit.api.runtime.AuditInstance;
 import com.flowable.core.spring.security.SecurityUtils;
 import com.flowable.platform.service.task.CompleteFormRepresentation;
 import com.flowable.platform.service.task.PlatformTaskService;
+import com.github.wnameless.json.flattener.JsonFlattener;
+import com.github.wnameless.json.unflattener.JsonUnflattener;
 import jakarta.mail.Address;
 import org.assertj.core.api.Assertions;
 import org.flowable.bpmn.model.*;
@@ -37,7 +43,6 @@ import org.springframework.util.StreamUtils;
 import org.springframework.web.client.RestClient;
 
 import java.io.*;
-import java.nio.charset.StandardCharsets;
 import java.nio.file.Paths;
 import java.util.*;
 import java.util.stream.Collectors;
@@ -51,11 +56,11 @@ public class FlowableModelTestUtils {
     protected final TaskService taskService;
     protected final PlatformTaskService platformTaskService;
     protected final ManagementService managementService;
-    protected final JsonUtils jsonUtils;
     protected final FlowableExcelMapper flowableExcelMapper;
     protected static final Logger logger = LoggerFactory.getLogger(FlowableModelTestUtils.class);
     protected final TestMailServer testMailServer;
     protected final AuditService auditService;
+    protected final ObjectMapper objectMapper = new ObjectMapper();
 
 
     public static final String TENANT_ID = null;
@@ -72,7 +77,6 @@ public class FlowableModelTestUtils {
                                   TaskService taskService,
                                   PlatformTaskService platformTaskService,
                                   ManagementService managementService,
-                                  JsonUtils jsonUtils,
                                   FlowableExcelMapper flowableExcelMapper,
                                   TestMailServer testMailServer,
                                   AuditService auditService) {
@@ -81,10 +85,36 @@ public class FlowableModelTestUtils {
         this.taskService = taskService;
         this.platformTaskService = platformTaskService;
         this.managementService = managementService;
-        this.jsonUtils = jsonUtils;
         this.flowableExcelMapper = flowableExcelMapper;
         this.testMailServer = testMailServer;
         this.auditService = auditService;
+        // Enable ObjectMapper for handling Instant as string
+        objectMapper.registerModule(new JavaTimeModule());
+        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
+    }
+
+    protected Map<String, Object> convertJsonNodeToMap(JsonNode jsonNode) {
+        return objectMapper.convertValue(jsonNode, new TypeReference<>() {});
+    }
+
+    protected JsonNode convertMapToJsonNode(Map<String, Object> map) {
+        return objectMapper.valueToTree(map);
+    }
+
+    protected Map<String, Object> flatten(Object payload) {
+        try {
+            return JsonFlattener.flattenAsMap(objectMapper.writeValueAsString(payload));
+        } catch (JsonProcessingException e) {
+            throw new UncheckedIOException("Cannot flatten: " + payload, e);
+        }
+    }
+
+    protected Map<String, Object> unflatten(Map<String, Object> flatVars) {
+        try {
+            return objectMapper.readValue(JsonUnflattener.unflatten(flatVars), new TypeReference<>() {});
+        } catch (JsonProcessingException e) {
+            throw new UncheckedIOException("Cannot unflatten: " + flatVars, e);
+        }
     }
 
     public void checkAndAssertAuditRecord(Map<String, Object> map, int auditNumber, String hint, String message, String category, String type) {
@@ -270,7 +300,7 @@ public class FlowableModelTestUtils {
     }
 
     public ObjectNode testJsonExcelRow(String path, JsonNode row) {
-        ObjectNode vars = jsonUtils.getEmptyObjectNode();
+        ObjectNode vars = objectMapper.createObjectNode();
         JsonNode rootParam = row.get("root");
         if (rootParam != null) {
             for (Map.Entry<String, JsonNode> rootVar : rootParam.properties()) {
@@ -300,14 +330,14 @@ public class FlowableModelTestUtils {
         logger.info("TestExcelRow file={} id={} rootParam={} inParam={} outParam={} timer={} test={} audit={} email={} ",
                 path, idParam, rootParam, inParam, outParam, timerCount, test, auditRecordCount, emailCount);
         Assertions.assertThat(idParam).as("Column 'id' missing in row of %s", path).isNotNull();
-        ObjectNode processIds = createRootTestProcessInstance(idParam.asText(), jsonUtils.convertJsonNodeToMap(vars));
+        ObjectNode processIds = createRootTestProcessInstance(idParam.asText(), convertJsonNodeToMap(vars));
         for (int i = 0; i < timerCount; i++) {
             executeTimer(processIds.get(TEST_PROCESS_ID).asText());
         }
 
-        ObjectNode result = jsonUtils.getEmptyObjectNode();
+        ObjectNode result = objectMapper.createObjectNode();
         Map<String, Object> rootProcessPayload = getHistProcessPayload(processIds.get(FlowableModelTestUtils.ROOT_PROCESS_ID).asText());
-        JsonNode root = jsonUtils.convertMapToJsonNode(rootProcessPayload);
+        JsonNode root = convertMapToJsonNode(rootProcessPayload);
         if (root != null) {
             Assertions.assertThat(isSubset(root, test))
                     .withFailMessage(System.lineSeparator() + "test :" + test + System.lineSeparator() + "root :" + root).isTrue();
@@ -316,12 +346,12 @@ public class FlowableModelTestUtils {
         if (auditRecordCount != null) {
             List<AuditInstance> auditTrail = getAuditTrail();
             Assertions.assertThat(auditTrail.size()).as("Invalid audit trail size: %s", auditTrail.size()).isEqualTo(auditRecordCount);
-            result.set("auditTrail", jsonUtils.convertListToJsonNode(Collections.singletonList(auditTrail)));
+            result.set("auditTrail", objectMapper.valueToTree(Collections.singletonList(auditTrail)));
         }
         if (emailCount != null) {
             List<EmailDto> emailList = getMailList();
             Assertions.assertThat(emailList.size()).as("Invalid number of emails: %s", emailList.size()).isEqualTo(emailCount);
-            result.set("emails", jsonUtils.convertListToJsonNode(Collections.singletonList(emailList)));
+            result.set("emails", objectMapper.valueToTree(Collections.singletonList(emailList)));
         }
         return result;
     }
@@ -362,9 +392,9 @@ public class FlowableModelTestUtils {
 
         Map<String, Object> result = new LinkedHashMap<>();
         Map<String, Object> rootProcessPayload = getHistProcessPayload(processIds.get(FlowableModelTestUtils.ROOT_PROCESS_ID).asText());
-        JsonNode root = jsonUtils.convertMapToJsonNode(rootProcessPayload);
+        JsonNode root = convertMapToJsonNode(rootProcessPayload);
         if (root != null) {
-            Assertions.assertThat(isSubset(root, jsonUtils.convertMapToJsonNode(test)))
+            Assertions.assertThat(isSubset(root, convertMapToJsonNode(test)))
                     .withFailMessage(System.lineSeparator() + "test :" + test + System.lineSeparator() + "root :" + root).isTrue();
             result.put("root", rootProcessPayload);
         }
@@ -409,7 +439,7 @@ public class FlowableModelTestUtils {
     }
 
     public ObjectNode emptyNode() {
-        return jsonUtils.getEmptyObjectNode();
+        return objectMapper.createObjectNode();
     }
 
     public Map<String, Object>  emptyMap() {
@@ -417,12 +447,12 @@ public class FlowableModelTestUtils {
     }
 
     public ObjectNode loadObjectNodeFromResources(String path) {
-        if (path == null || path.isEmpty()) return jsonUtils.getEmptyObjectNode();
+        if (path == null || path.isEmpty()) return objectMapper.createObjectNode();
         try (InputStream inputStream = getClass().getClassLoader().getResourceAsStream(path)) {
             if (inputStream == null) {
                 throw new IllegalArgumentException("Resource not found: " + path);
             }
-            JsonNode jsonNode = jsonUtils.convertJsonStringToJsonNode(new String(inputStream.readAllBytes(), StandardCharsets.UTF_8));
+            JsonNode jsonNode = objectMapper.readTree(inputStream);
             Assertions.assertThat(jsonNode).as("Resource %s is not a JSON object", path).isInstanceOf(ObjectNode.class);
             return (ObjectNode) jsonNode;
         } catch (IOException e) {
@@ -448,9 +478,9 @@ public class FlowableModelTestUtils {
                         Assertions.assertThat(rootVar.getKey().startsWith("__"))
                                 .as("Root parameter '%s' in %s must not start with '__'", rootVar.getKey(), path).isFalse();
                     }
-                    vars.putAll(jsonUtils.convertJsonNodeToMap(field.getValue()));
+                    vars.putAll(convertJsonNodeToMap(field.getValue()));
                 }
-                case IN_PARAM, OUT_PARAM -> vars.put(key, jsonUtils.convertJsonNodeToMap(field.getValue()));
+                case IN_PARAM, OUT_PARAM -> vars.put(key, convertJsonNodeToMap(field.getValue()));
                 default -> throw new IllegalArgumentException("Implicit parameter '" + key + "' in " + path
                         + ": parameters must be declared explicitly inside " + ROOT_PARAM + ", " + IN_PARAM + " or " + OUT_PARAM);
             }
@@ -495,9 +525,9 @@ public class FlowableModelTestUtils {
 
     public void completeTaskWithFlatVars(String taskId, Map<String, Object> variables, String outcome) {
         Map<String, Object> taskVariables = platformTaskService.getTaskVariables(taskId);
-        Map<String, Object> taskVariablesFlat = jsonUtils.flatten(taskVariables);
+        Map<String, Object> taskVariablesFlat = flatten(taskVariables);
         taskVariablesFlat.putAll(variables);
-        Map<String, Object> completionVars = jsonUtils.unflatten(taskVariablesFlat);
+        Map<String, Object> completionVars = unflatten(taskVariablesFlat);
 
         completeTask(taskId, completionVars, outcome);
     }
@@ -513,7 +543,7 @@ public class FlowableModelTestUtils {
 
     public void completeOpenTask(String taskKey, ObjectNode vars, String outcome) {
         Task task = getOpenTask(taskKey);
-        Map<String, Object> flatVars = jsonUtils.convertJsonNodeToMap(vars);
+        Map<String, Object> flatVars = convertJsonNodeToMap(vars);
         completeTaskWithFlatVars(task.getId(), flatVars, outcome);
     }
 
@@ -536,7 +566,7 @@ public class FlowableModelTestUtils {
     public ObjectNode createRootTestProcessInstance(String testKey, Map<String, Object> variables) {
         // Create root process with test process as call activity
         String wrapperProcessKey = testKey + "_T";
-        BpmnModel bpmnModel = createWrapperTestProcessModel(testKey, (ObjectNode) jsonUtils.convertMapToJsonNode(variables));
+        BpmnModel bpmnModel = createWrapperTestProcessModel(testKey, (ObjectNode) convertMapToJsonNode(variables));
         processEngine.getProcessEngineConfiguration()
                 .getRepositoryService()
                 .createDeployment()
@@ -563,7 +593,7 @@ public class FlowableModelTestUtils {
             // if history level is none, testProcessId is not available
             testProcessId = historicTestProcessInstance != null ? historicTestProcessInstance.getId() : null;
         }
-        ObjectNode rootNode = jsonUtils.getEmptyObjectNode();
+        ObjectNode rootNode = objectMapper.createObjectNode();
         rootNode.put(ROOT_PROCESS_ID, rootProcessInstance.getProcessInstanceId());
         rootNode.put(TEST_PROCESS_ID, testProcessId);
         return rootNode;