diff --git a/doc/changelog.d/671.test.md b/doc/changelog.d/671.test.md
new file mode 100644
index 000000000..12d79783e
--- /dev/null
+++ b/doc/changelog.d/671.test.md
@@ -0,0 +1 @@
+Fix: fixed unit tests
diff --git a/src/ansys/sherlock/core/common.py b/src/ansys/sherlock/core/common.py
index 9a5c8ff0f..d5056ed2f 100644
--- a/src/ansys/sherlock/core/common.py
+++ b/src/ansys/sherlock/core/common.py
@@ -145,10 +145,10 @@ def list_solder_materials(self) -> list[str]:
         if not self._is_connection_up():
             raise SherlockNoGrpcConnectionException()
 
-        request = SherlockCommonService_pb2.GetSoldersRequest()
-        response = self.stub.getSolders(request)
+        request = SherlockCommonService_pb2.SolderInfoRequest()
+        response = self.stub.getSolderInfo(request)
 
-        return response.solderName
+        return response.solders
 
     @require_version(251)
     def get_sherlock_info(self) -> str:
diff --git a/src/ansys/sherlock/core/errors.py b/src/ansys/sherlock/core/errors.py
index 930c14e80..cf1c2d7e9 100644
--- a/src/ansys/sherlock/core/errors.py
+++ b/src/ansys/sherlock/core/errors.py
@@ -224,13 +224,17 @@ def str_itr(self):
 class SherlockAddRandomVibeEventError(Exception):
     """Contains the errors raised when a random vibe event cannot be added."""
 
-    def __init__(self, message: str):
+    def __init__(self, message: Optional[str] = None, error_array: Optional[list[str]] = None):
         """Initialize error message."""
         self.message = message
+        self.error_array = error_array
 
     def str_itr(self):
         """Create list of error messages."""
-        if self.message is not None:
+        if self.error_array is not None:
+            return [f"Add random vibe event error: {error}" for error in self.error_array]
+
+        elif self.message is not None:
             return [f"Add random vibe event error: {self.message}"]
 
 
diff --git a/tests/test_lifecycle.py b/tests/test_lifecycle.py
index f672e92b9..7fec64c93 100644
--- a/tests/test_lifecycle.py
+++ b/tests/test_lifecycle.py
@@ -2257,6 +2257,7 @@ def helper_test_load_harmonic_profile(lifecycle: Lifecycle):
                 "Phase 1",
                 "Harmonic Event",
                 "Test_Profile.dat",
+                "x",
             )
             pytest.fail("No exception raised when using an invalid parameter")
         except Exception as e:
diff --git a/tests/test_parts.py b/tests/test_parts.py
index a563ea504..0fa90b420 100644
--- a/tests/test_parts.py
+++ b/tests/test_parts.py
@@ -159,7 +159,7 @@ def helper_test_update_parts_from_AVL(parts: Parts):
                 avl_description=AVLDescription.ASSIGN_APPROVED_DESCRIPTION,
             )
 
-            assert response.returnCode.value == 0
+            assert response == 0
         except SherlockUpdatePartsFromAVLError as e:
             pytest.fail(e.message)