diff --git a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/HsOfficeScenarioTests.java b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/HsOfficeScenarioTests.java
index ca9c5483..9677120b 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/HsOfficeScenarioTests.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/HsOfficeScenarioTests.java
@@ -134,9 +134,11 @@ class HsOfficeScenarioTests extends ScenarioTest {
 
     @Test
     @Order(1100)
+    @Requires("Partner: Michelle Matthieu")
     void shouldAmendContactData() {
         new AmendContactData(this)
-                .given("partnerNumber", 31020)
+                .given("partnerName", "Matthieu")
+                .given("newEmailAddress", "michelle@matthieu.example.org")
                 .doRun();
     }
 
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/contact/AmendContactData.java b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/contact/AmendContactData.java
index 360f0756..49e611bb 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/contact/AmendContactData.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/contact/AmendContactData.java
@@ -2,8 +2,10 @@ package net.hostsharing.hsadminng.hs.office.scenarios.contact;
 
 import net.hostsharing.hsadminng.hs.office.scenarios.ScenarioTest;
 import net.hostsharing.hsadminng.hs.office.scenarios.UseCase;
+import org.springframework.http.HttpStatus;
 
-import static org.assertj.core.api.Assumptions.assumeThat;
+import static io.restassured.http.ContentType.JSON;
+import static org.springframework.http.HttpStatus.OK;
 
 public class AmendContactData extends UseCase<AmendContactData> {
 
@@ -13,7 +15,28 @@ public class AmendContactData extends UseCase<AmendContactData> {
 
     @Override
     protected HttpResponse run() {
-        assumeThat(false).isTrue(); // makes the test gray
+
+        obtain("partnerPersonUuid", () ->
+                        httpGet("/api/hs/office/relations?relationType=PARTNER&personData=" + uriEncoded("%{partnerName}"))
+                                .expecting(OK).expecting(JSON),
+                response -> response.expectArrayElements(1).getFromBody("[0].contact.uuid"),
+                "In production data this query could result in multiple outputs. In that case, you have to find out which is the right one."
+        );
+
+        httpPatch("/api/hs/office/contacts/%{partnerPersonUuid}", usingJsonBody("""
+            {
+                "caption": ${contactCaption???},
+                "postalAddress": ${postalAddress???},
+                "phoneNumbers": {
+                    "office": ${officePhoneNumber???}
+                },
+                "emailAddresses": {
+                    "main": ${newEmailAddress???}
+                }
+            }
+            """))
+                .expecting(HttpStatus.OK);
+
         return null;
     }
 }
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/debitor/CreateSelfDebitorForPartner.java b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/debitor/CreateSelfDebitorForPartner.java
index 91a21a00..d815bc61 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/debitor/CreateSelfDebitorForPartner.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/debitor/CreateSelfDebitorForPartner.java
@@ -19,8 +19,7 @@ public class CreateSelfDebitorForPartner extends UseCase<CreateSelfDebitorForPar
                 httpGet("/api/hs/office/relations?relationType=PARTNER&personData=" + uriEncoded("%{partnerPersonTradeName}"))
                         .expecting(OK).expecting(JSON),
                 response -> response.expectArrayElements(1).getFromBody("[0].holder.uuid"),
-                "In production data this query could result in multiple outputs. In that case, you have to find out which is the right one.",
-                "**HINT**: With production data, you might get multiple results and have to decide which is the right one."
+                "In production data this query could result in multiple outputs. In that case, you have to find out which is the right one."
         );
 
         obtain("BankAccount: Test AG - refund bank account", () ->