diff --git a/tests/src/test/scala/common/WskTestHelpers.scala b/tests/src/test/scala/common/WskTestHelpers.scala
index e8d216ba721..419fc673a91 100644
--- a/tests/src/test/scala/common/WskTestHelpers.scala
+++ b/tests/src/test/scala/common/WskTestHelpers.scala
@@ -95,6 +95,7 @@ object ActivationResponse extends DefaultJsonProtocol {
  * @param annotations a list of JSON objects to save the annotations of the activation
  */
 case class ActivationResult(activationId: String,
+                            namespace: String,
                             logs: Option[List[String]],
                             response: ActivationResponse,
                             start: Instant,
@@ -123,14 +124,14 @@ object ActivationResult extends DefaultJsonProtocol {
   }
 
   implicit val serdes = new RootJsonFormat[ActivationResult] {
-    private val format = jsonFormat8(ActivationResult.apply)
+    private val format = jsonFormat9(ActivationResult.apply)
 
     def write(result: ActivationResult) = format.write(result)
 
     def read(value: JsValue) = {
       val obj = value.asJsObject
-      obj.getFields("activationId", "response", "start") match {
-        case Seq(JsString(activationId), response, start) =>
+      obj.getFields("activationId", "namespace", "response", "start") match {
+        case Seq(JsString(activationId), JsString(namespace), response, start) =>
           Try {
             val logs = obj.fields.get("logs").map(_.convertTo[List[String]])
             val end = obj.fields.get("end").map(_.convertTo[Instant]).getOrElse(Instant.EPOCH)
@@ -139,6 +140,7 @@ object ActivationResult extends DefaultJsonProtocol {
             val annotations = obj.fields.get("annotations").map(_.convertTo[List[JsObject]])
             new ActivationResult(
               activationId,
+              namespace,
               logs,
               response.convertTo[ActivationResponse],
               start.convertTo[Instant],
diff --git a/tests/src/test/scala/system/basic/WskActivationTests.scala b/tests/src/test/scala/system/basic/WskActivationTests.scala
index b5c39de4eb3..514f8aebb17 100644
--- a/tests/src/test/scala/system/basic/WskActivationTests.scala
+++ b/tests/src/test/scala/system/basic/WskActivationTests.scala
@@ -51,4 +51,32 @@ class WskActivationTests extends TestHelpers with WskTestHelpers with WskActorSy
       resultWithoutSize shouldBe expectedResult
     }
   }
+
+  it should "invoke a shared action under a different invocation namespace" in withAssetCleaner(wskprops) {
+    (wp, assetHelper) =>
+      val packageName = "shared-package"
+      val actionName = "echo"
+      var invocationNamesapce = if (wskprops.namespace == "_") "guest" else wskprops.namespace
+      val packageActionName = s"/${invocationNamesapce}/${packageName}/${actionName}"
+
+      assetHelper.withCleaner(wsk.pkg, packageName) { (pkg, _) =>
+        pkg.create(packageName, shared = Some(true))(wp)
+      }
+
+      assetHelper.withCleaner(wsk.action, packageActionName) { (action, _) =>
+        action.create(packageActionName, Some(TestUtils.getTestActionFilename("echo.js")))(wp)
+      }
+
+      withActivation(wsk.activation, wsk.action.invoke(packageActionName)(wp)) { activation =>
+        activation.namespace shouldBe invocationNamesapce
+      }(wp)
+
+      val systemId = "whisk.system"
+      val wskprops2 = WskProps(authKey = WskAdmin.listKeys(systemId)(0)._1, namespace = systemId)
+      invocationNamesapce = if (wskprops2.namespace == "_") "guest" else wskprops2.namespace
+
+      withActivation(wsk.activation, wsk.action.invoke(packageActionName)(wskprops2)) { activation =>
+        activation.namespace shouldBe invocationNamesapce
+      }(wskprops2)
+  }
 }