diff --git a/rm-automation/rm-automation-community-rest-api/src/main/java/org/alfresco/rest/core/v0/APIUtils.java b/rm-automation/rm-automation-community-rest-api/src/main/java/org/alfresco/rest/core/v0/APIUtils.java
index fb6e3d9802..3d3f362a41 100644
--- a/rm-automation/rm-automation-community-rest-api/src/main/java/org/alfresco/rest/core/v0/APIUtils.java
+++ b/rm-automation/rm-automation-community-rest-api/src/main/java/org/alfresco/rest/core/v0/APIUtils.java
@@ -27,6 +27,8 @@
 package org.alfresco.rest.core.v0;
 
 import java.io.IOException;
+import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeFormatterBuilder;
 
 import org.apache.commons.io.IOUtils;
 import org.apache.http.HttpResponse;
@@ -44,6 +46,10 @@ public class APIUtils
 {
     /** Logger for this class. */
     private static final Logger LOGGER = LoggerFactory.getLogger(APIUtils.class);
+    /** The ISO instant formatter that formats or parses an instant in UTC, such as '2011-12-03T10:15:305Z'
+     * similar with {@link DateTimeFormatter#ISO_INSTANT}, but with only 3 nanoseconds*/
+    public static final DateTimeFormatter ISO_INSTANT_FORMATTER =
+            new DateTimeFormatterBuilder().appendInstant(3).toFormatter();
 
     /** Private constructor for helper class. */
     private APIUtils()
diff --git a/rm-automation/rm-automation-community-rest-api/src/main/java/org/alfresco/rest/v0/RMRolesAndActionsAPI.java b/rm-automation/rm-automation-community-rest-api/src/main/java/org/alfresco/rest/v0/RMRolesAndActionsAPI.java
index 6f07fcf3ab..96025d88b3 100644
--- a/rm-automation/rm-automation-community-rest-api/src/main/java/org/alfresco/rest/v0/RMRolesAndActionsAPI.java
+++ b/rm-automation/rm-automation-community-rest-api/src/main/java/org/alfresco/rest/v0/RMRolesAndActionsAPI.java
@@ -27,6 +27,7 @@
 package org.alfresco.rest.v0;
 
 import static org.alfresco.dataprep.AlfrescoHttpClient.MIME_TYPE_JSON;
+import static org.alfresco.rest.core.v0.APIUtils.ISO_INSTANT_FORMATTER;
 import static org.apache.http.HttpStatus.SC_OK;
 import static org.testng.AssertJUnit.assertEquals;
 import static org.testng.AssertJUnit.assertNotNull;
@@ -37,7 +38,6 @@ import java.io.IOException;
 import java.text.MessageFormat;
 import java.time.Instant;
 import java.time.ZonedDateTime;
-import java.time.format.DateTimeFormatter;
 import java.util.Arrays;
 import java.util.Map;
 import java.util.Set;
@@ -341,7 +341,7 @@ public class RMRolesAndActionsAPI extends BaseAPI
         requestParams.put("nodeRef", recNodeRef);
         if (date != null)
         {
-            String thisMoment = date.format(DateTimeFormatter.ISO_INSTANT);
+            String thisMoment = date.format(ISO_INSTANT_FORMATTER);
             requestParams.put("params", new JSONObject()
                             .put("asOfDate", new JSONObject()
                                     .put("iso8601", thisMoment)
@@ -368,7 +368,7 @@ public class RMRolesAndActionsAPI extends BaseAPI
         requestParams.put("name", RM_ACTIONS.COMPLETE_EVENT.getAction());
         requestParams.put("nodeRef", recNodeRef);
         date = (date != null) ? date : Instant.now();
-        String formattedDate = DateTimeFormatter.ISO_INSTANT.format(date);
+        String formattedDate = ISO_INSTANT_FORMATTER.format(date);
         requestParams.put("params", new JSONObject()
                         .put("eventName", event.getEventName())
                         .put("eventCompletedBy", user)