diff --git a/client/src/test/java/dev/fitko/fitconnect/client/SubscriberClientTest.java b/client/src/test/java/dev/fitko/fitconnect/client/SubscriberClientTest.java
index a9085e2e2889c452c68a5d715282c69917ba8ffb..0c251d820da82d13db7bad1a5dca98bde19de8e1 100644
--- a/client/src/test/java/dev/fitko/fitconnect/client/SubscriberClientTest.java
+++ b/client/src/test/java/dev/fitko/fitconnect/client/SubscriberClientTest.java
@@ -389,7 +389,7 @@ class SubscriberClientTest {
         final FitConnectSubscriberException exception = assertThrows(FitConnectSubscriberException.class, () -> underTest.requestSubmission(submissionId));
 
         // Then
-        assertThat(exception.getCause().getMessage(), containsString("Metadata is invalid"));
+        assertThat(exception.getCause().getMessage(), containsString("The authentication tag for the metadata is invalid"));
         verify(subscriberMock, times(1)).rejectSubmission(EventPayload.forRejectEvent(submission, List.of(problem)));
     }
 
@@ -556,7 +556,7 @@ class SubscriberClientTest {
         final FitConnectSubscriberException exception = assertThrows(FitConnectSubscriberException.class, () -> underTest.requestSubmission(submissionId));
 
         // Then
-        assertThat(exception.getCause().getMessage(), containsString("Data is invalid"));
+        assertThat(exception.getCause().getMessage(), containsString("Submission data checksum wrong"));
         verify(subscriberMock, times(1)).rejectSubmission(EventPayload.forRejectEvent(submission, List.of(problem)));
 
     }
@@ -613,7 +613,7 @@ class SubscriberClientTest {
         final FitConnectSubscriberException exception = assertThrows(FitConnectSubscriberException.class, () -> underTest.requestSubmission(submissionId));
 
         // Then
-        assertThat(exception.getCause().getMessage(), containsString("Data is invalid"));
+        assertThat(exception.getCause().getMessage(), containsString("Submission data does not comply to schema"));
         verify(subscriberMock, times(1)).rejectSubmission(EventPayload.forRejectEvent(submission, List.of(problem)));
     }
 
@@ -682,7 +682,7 @@ class SubscriberClientTest {
         final FitConnectSubscriberException exception = assertThrows(FitConnectSubscriberException.class, () -> underTest.requestSubmission(submissionId));
 
         // Then
-        assertThat(exception.getCause().getMessage(), containsString("Attachment validation failed"));
+        assertThat(exception.getCause().getMessage(), containsString("The authentication tag for the attachment " + attachment.getAttachmentId() + " is invalid"));
         verify(subscriberMock, times(1)).rejectSubmission(EventPayload.forRejectEvent(submission, List.of(problem)));
     }