diff --git a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/restapi/NodesResponse.java b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/restapi/NodesResponse.java
index 03044319d54..5b0c0f0e16e 100644
--- a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/restapi/NodesResponse.java
+++ b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/restapi/NodesResponse.java
@@ -237,6 +237,7 @@ private void toSlime(Collection<History.Event> events, Cursor array) {
             object.setString("event", event.type().name());
             object.setLong("at", event.at().toEpochMilli());
             object.setString("agent", event.agent().name());
+            event.reason().ifPresent(reason -> object.setString("reason", reason));
         }
     }
 
diff --git a/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/dockerhost6.json b/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/dockerhost6.json
index 0e1892b4190..f30c50b6c27 100644
--- a/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/dockerhost6.json
+++ b/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/dockerhost6.json
@@ -49,7 +49,8 @@
     {
       "event": "failed",
       "at": 123,
-      "agent": "operator"
+      "agent": "operator",
+      "reason": "MockNodeRepository"
     },
     {
       "event": "deprovisioned",
@@ -76,7 +77,8 @@
     {
       "event": "failed",
       "at": 123,
-      "agent": "operator"
+      "agent": "operator",
+      "reason": "MockNodeRepository"
     },
     {
       "event": "deprovisioned",
diff --git a/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node4-after-changes.json b/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node4-after-changes.json
index a3589e760ad..325e250bf48 100644
--- a/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node4-after-changes.json
+++ b/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node4-after-changes.json
@@ -88,7 +88,8 @@
     {
       "event": "wantToFail",
       "at": 123,
-      "agent": "operator"
+      "agent": "operator",
+      "reason": "Failed through the nodes/v2 API"
     },
     {
       "event": "rebooted",
@@ -135,7 +136,8 @@
     {
       "event": "wantToFail",
       "at": 123,
-      "agent": "operator"
+      "agent": "operator",
+      "reason": "Failed through the nodes/v2 API"
     },
     {
       "event": "rebooted",
diff --git a/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node5-after-changes.json b/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node5-after-changes.json
index fafaf61ef78..8f3c32a4ce6 100644
--- a/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node5-after-changes.json
+++ b/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node5-after-changes.json
@@ -48,7 +48,8 @@
     {
       "event": "failed",
       "at": 123,
-      "agent": "system"
+      "agent": "system",
+      "reason": "MockNodeRepository"
     }
   ],
   "log": [
@@ -70,7 +71,8 @@
     {
       "event": "failed",
       "at": 123,
-      "agent": "system"
+      "agent": "system",
+      "reason": "MockNodeRepository"
     }
   ],
   "ipAddresses": ["::5:1", "127.0.5.1"],
diff --git a/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node5.json b/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node5.json
index aae4fe84fb8..c7d2d7988ed 100644
--- a/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node5.json
+++ b/node-repository/src/test/java/com/yahoo/vespa/hosted/provision/restapi/responses/node5.json
@@ -50,7 +50,8 @@
     {
       "event": "failed",
       "at": 123,
-      "agent": "system"
+      "agent": "system",
+      "reason": "MockNodeRepository"
     }
   ],
   "log": [
@@ -72,7 +73,8 @@
     {
       "event": "failed",
       "at": 123,
-      "agent": "system"
+      "agent": "system",
+      "reason": "MockNodeRepository"
     }
   ],
   "ipAddresses": ["::5:1", "127.0.5.1"],