diff --git a/src/backend/tests/unit/components/vectorstores/test_weaviate.py b/src/backend/tests/unit/components/vectorstores/test_weaviate.py
index 666c8dd64a..88e91ee48d 100644
--- a/src/backend/tests/unit/components/vectorstores/test_weaviate.py
+++ b/src/backend/tests/unit/components/vectorstores/test_weaviate.py
@@ -7,12 +7,21 @@ network boundary (the v4 ``connect_*`` helpers and the store class) is mocked so
 the migration logic runs in CI without a live Weaviate instance.
 """
 
+import sys
 from unittest.mock import MagicMock
 
 import pytest
 from lfx.components.weaviate.weaviate import WeaviateVectorStoreComponent
 from lfx.schema.data import Data
 
+# The component moved into lfx-bundles, so ``weaviate.py`` is reachable under several
+# module identities (the ``lfx.components.weaviate.weaviate`` shim, the canonical
+# ``lfx_bundles.weaviate.weaviate``, and the runtime ``_lfx_ext.*`` ext-loader copy).
+# Patch on the module the imported class actually lives in: a fixed string target like
+# "lfx.components.weaviate.weaviate.WeaviateVectorStore" misses (mock "called 0 times")
+# when an earlier test in the suite causes the class to resolve to a different identity.
+_WEAVIATE_MODULE = sys.modules[WeaviateVectorStoreComponent.__module__]
+
 
 def test_initialization():
     component = WeaviateVectorStoreComponent()
@@ -49,7 +58,7 @@ def test_connect_client_custom(mocker):
 def test_connect_client_cloud(mocker):
     """A Weaviate Cloud URL routes to connect_to_weaviate_cloud (gRPC resolved internally)."""
     mock_cloud = mocker.patch("weaviate.connect_to_weaviate_cloud", return_value=MagicMock())
-    mock_auth = mocker.patch("lfx.components.weaviate.weaviate.AuthApiKey", return_value="AUTH")
+    mock_auth = mocker.patch.object(_WEAVIATE_MODULE, "AuthApiKey", return_value="AUTH")
     component = WeaviateVectorStoreComponent(
         url="https://my-cluster.weaviate.network",
         index_name="Test",
@@ -74,7 +83,7 @@ def test_connect_client_wraps_errors(mocker):
 def test_build_vector_store_without_documents(mocker):
     mock_client = MagicMock()
     mocker.patch.object(WeaviateVectorStoreComponent, "_connect_client", return_value=mock_client)
-    mock_store_cls = mocker.patch("lfx.components.weaviate.weaviate.WeaviateVectorStore", return_value=MagicMock())
+    mock_store_cls = mocker.patch.object(_WEAVIATE_MODULE, "WeaviateVectorStore", return_value=MagicMock())
     fake_embedding = MagicMock()
 
     component = WeaviateVectorStoreComponent(url="http://localhost:8080", index_name="Test")
@@ -95,7 +104,7 @@ def test_build_vector_store_without_documents(mocker):
 def test_build_vector_store_with_documents_uses_from_documents(mocker):
     mock_client = MagicMock()
     mocker.patch.object(WeaviateVectorStoreComponent, "_connect_client", return_value=mock_client)
-    mock_store_cls = mocker.patch("lfx.components.weaviate.weaviate.WeaviateVectorStore")
+    mock_store_cls = mocker.patch.object(_WEAVIATE_MODULE, "WeaviateVectorStore")
     fake_embedding = MagicMock()
 
     component = WeaviateVectorStoreComponent(url="http://localhost:8080", index_name="Test")