diff --git a/thehive/app/org/thp/thehive/controllers/v0/CaseCtrl.scala b/thehive/app/org/thp/thehive/controllers/v0/CaseCtrl.scala
index bf1fb64815..522c7f432b 100644
--- a/thehive/app/org/thp/thehive/controllers/v0/CaseCtrl.scala
+++ b/thehive/app/org/thp/thehive/controllers/v0/CaseCtrl.scala
@@ -157,7 +157,7 @@ class CaseCtrl @Inject() (
           _       <- sameOrga(Seq(caze, toMerge))
           _       <- sameProfile(Seq(caze, toMerge))
           merged  <- caseSrv.merge(Seq(caze, toMerge))
-        } yield Results.Ok(merged.toJson)
+        } yield Results.Created(merged.toJson)
       }
 
   private def sameOrga(cases: Seq[Case with Entity])(implicit graph: Graph): Try[Seq[Case with Entity]] =
diff --git a/thehive/test/org/thp/thehive/controllers/v0/CaseCtrlTest.scala b/thehive/test/org/thp/thehive/controllers/v0/CaseCtrlTest.scala
index 35530cdc20..ed4089fc05 100644
--- a/thehive/test/org/thp/thehive/controllers/v0/CaseCtrlTest.scala
+++ b/thehive/test/org/thp/thehive/controllers/v0/CaseCtrlTest.scala
@@ -369,8 +369,8 @@ class CaseCtrlTest extends PlaySpecification with TestAppBuilder {
       status(case21) must equalTo(200).updateMessage(s => s"$s\n${contentAsString(case21)}")
       val output21 = contentAsJson(case21).as[OutputCase]
 
-      val request = FakeRequest("GET", "/api/v0/case/21/_merge/22")
-        .withHeaders("user" -> "admin@thehive.local")
+      val request = FakeRequest("POST", "/api/v0/case/21/_merge/22")
+        .withHeaders("user" -> "certuser@thehive.local")
 
       val result = app[CaseCtrl].merge("21", "22")(request)
       status(result) must beEqualTo(201).updateMessage(s => s"$s\n${contentAsString(result)}")
@@ -389,8 +389,8 @@ class CaseCtrlTest extends PlaySpecification with TestAppBuilder {
           tlp = 4,
           pap = 3,
           status = "Open",
-          tags = Set.empty,
-          owner = None,
+          tags = Set("toMerge:pred1=\"value1\"", "toMerge:pred2=\"value2\""),
+          owner = Some("certuser@thehive.local"),
           stats = JsObject.empty
         )
       )
@@ -403,8 +403,8 @@ class CaseCtrlTest extends PlaySpecification with TestAppBuilder {
     }
 
     "merge two cases error, not same organisation" in testApp { app =>
-      val request = FakeRequest("GET", "/api/v0/case/21/_merge/24")
-        .withHeaders("user" -> "admin@thehive.local")
+      val request = FakeRequest("POST", "/api/v0/case/21/_merge/24")
+        .withHeaders("user" -> "certuser@thehive.local")
 
       val result = app[CaseCtrl].merge("21", "24")(request)
       // User shouldn't be able to see others cases, resulting in 404
@@ -412,8 +412,8 @@ class CaseCtrlTest extends PlaySpecification with TestAppBuilder {
     }
 
     "merge two cases error, not same profile" in testApp { app =>
-      val request = FakeRequest("GET", "/api/v0/case/21/_merge/25")
-        .withHeaders("user" -> "admin@thehive.local")
+      val request = FakeRequest("POST", "/api/v0/case/21/_merge/25")
+        .withHeaders("user" -> "certuser@thehive.local")
 
       val result = app[CaseCtrl].merge("21", "25")(request)
       status(result) must beEqualTo(400).updateMessage(s => s"$s\n${contentAsString(result)}")
diff --git a/thehive/test/org/thp/thehive/services/CaseSrvTest.scala b/thehive/test/org/thp/thehive/services/CaseSrvTest.scala
index 1bc85ef950..8753dbb560 100644
--- a/thehive/test/org/thp/thehive/services/CaseSrvTest.scala
+++ b/thehive/test/org/thp/thehive/services/CaseSrvTest.scala
@@ -419,9 +419,10 @@ class CaseSrvTest extends PlaySpecification with TestAppBuilder {
         } yield newCase
       } must beASuccessfulTry.which { richCase =>
         app[Database].roTransaction { implicit graph =>
-          app[CaseSrv].get(EntityName(richCase.number.toString)).tasks.toSeq.size mustEqual 3
-          app[CaseSrv].get(EntityName(richCase.number.toString)).observables.toSeq.size mustEqual 3
-          app[CaseSrv].get(EntityName(richCase.number.toString)).procedure.toSeq.size mustEqual 3
+          val mergedCase = app[CaseSrv].get(EntityName(richCase.number.toString))
+          mergedCase.clone().tasks.toSeq.size mustEqual 3
+          mergedCase.clone().observables.toSeq.size mustEqual 3
+          mergedCase.clone().procedure.toSeq.size mustEqual 3
         }
       }
     }