diff --git a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/debitor/CreateSepaMandateForDebitor.java b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/debitor/CreateSepaMandateForDebitor.java
index b50cc7c9..62ae5b54 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/debitor/CreateSepaMandateForDebitor.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/debitor/CreateSepaMandateForDebitor.java
@@ -17,9 +17,9 @@ public class CreateSepaMandateForDebitor extends UseCase<CreateSepaMandateForDeb
     protected HttpResponse run() {
 
         obtain("Debitor: Test AG - main debitor", () ->
-            httpGet("/api/hs/office/debitors?debitorNumber=&{debitorNumber}")
+            httpGet("/api/hs/office/debitors/%{debitorNumber}")
                     .expecting(OK).expecting(JSON),
-            response -> response.expectArrayElements(1).getFromBody("[0].uuid")
+            response -> response.getFromBody("uuid")
         );
 
         obtain("BankAccount: Test AG - debit bank account", () ->
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/CancelMembership.java b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/CancelMembership.java
index d5d00900..5f3c3196 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/CancelMembership.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/CancelMembership.java
@@ -18,9 +18,8 @@ public class CancelMembership extends UseCase<CancelMembership> {
     protected HttpResponse run() {
 
         obtain("Membership: %{memberNumber}", () ->
-                httpGet("/api/hs/office/memberships?memberNumber=%{memberNumber}")
-                        .expectArrayElements(1),
-                response -> response.expectArrayElements(1).getFromBody("[0].uuid")
+                httpGet("/api/hs/office/memberships/%{memberNumber}"),
+                response -> response.getFromBody("uuid")
         );
 
         return withTitle("Patch the New Status Into the Membership", () ->
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/coopassets/CreateCoopAssetsTransaction.java b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/coopassets/CreateCoopAssetsTransaction.java
index beb78b52..1052db28 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/coopassets/CreateCoopAssetsTransaction.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/coopassets/CreateCoopAssetsTransaction.java
@@ -18,9 +18,9 @@ public abstract class CreateCoopAssetsTransaction extends UseCase<CreateCoopAsse
     protected HttpResponse run() {
 
         obtain("#{Find }membershipUuid", () ->
-            httpGet("/api/hs/office/memberships?memberNumber=&{memberNumber}")
-                    .expecting(OK).expecting(JSON).expectArrayElements(1),
-            response -> response.getFromBody("$[0].uuid")
+            httpGet("/api/hs/office/memberships/%{memberNumber}")
+                    .expecting(OK).expecting(JSON),
+            response -> response.getFromBody("uuid")
         );
 
         return withTitle("Create the Coop-Assets-%{transactionType} Transaction", () ->
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/coopshares/CreateCoopSharesTransaction.java b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/coopshares/CreateCoopSharesTransaction.java
index a70cbdf5..6c215b5d 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/coopshares/CreateCoopSharesTransaction.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/membership/coopshares/CreateCoopSharesTransaction.java
@@ -18,9 +18,9 @@ public abstract class CreateCoopSharesTransaction extends UseCase<CreateCoopShar
     protected HttpResponse run() {
 
         obtain("#{Find }membershipUuid", () ->
-            httpGet("/api/hs/office/memberships?memberNumber=&{memberNumber}")
-                    .expecting(OK).expecting(JSON).expectArrayElements(1),
-            response -> response.getFromBody("$[0].uuid")
+            httpGet("/api/hs/office/memberships/%{memberNumber}")
+                    .expecting(OK).expecting(JSON),
+            response -> response.getFromBody("uuid")
         );
 
         return withTitle("Create the Coop-Shares-%{transactionType} Transaction", () ->