diff --git a/e2e/preview/pipelines/test_preprocessing_pipeline.py b/e2e/preview/pipelines/test_preprocessing_pipeline.py
index b99ec89a56..9dac07b8d1 100644
--- a/e2e/preview/pipelines/test_preprocessing_pipeline.py
+++ b/e2e/preview/pipelines/test_preprocessing_pipeline.py
@@ -3,8 +3,8 @@
 from haystack.preview import Pipeline
 from haystack.preview.components.embedders import SentenceTransformersDocumentEmbedder
 from haystack.preview.components.file_converters import TextFileToDocument
-from haystack.preview.components.preprocessors import TextDocumentSplitter, TextDocumentCleaner
-from haystack.preview.components.routers import FileTypeRouter, DocumentLanguageClassifier
+from haystack.preview.components.preprocessors import TextDocumentSplitter, DocumentCleaner, DocumentLanguageClassifier
+from haystack.preview.components.routers import FileTypeRouter
 from haystack.preview.components.writers import DocumentWriter
 from haystack.preview.document_stores import MemoryDocumentStore
 
@@ -16,7 +16,7 @@ def test_preprocessing_pipeline(tmp_path):
     preprocessing_pipeline.add_component(instance=FileTypeRouter(mime_types=["text/plain"]), name="file_type_router")
     preprocessing_pipeline.add_component(instance=TextFileToDocument(), name="text_file_converter")
     preprocessing_pipeline.add_component(instance=DocumentLanguageClassifier(), name="language_classifier")
-    preprocessing_pipeline.add_component(instance=TextDocumentCleaner(), name="cleaner")
+    preprocessing_pipeline.add_component(instance=DocumentCleaner(), name="cleaner")
     preprocessing_pipeline.add_component(
         instance=TextDocumentSplitter(split_by="sentence", split_length=1), name="splitter"
     )
diff --git a/test/preview/components/preprocessors/test_document_language_classifier.py b/test/preview/components/preprocessors/test_document_language_classifier.py
index 838d437c12..a7ab826ac8 100644
--- a/test/preview/components/preprocessors/test_document_language_classifier.py
+++ b/test/preview/components/preprocessors/test_document_language_classifier.py
@@ -6,8 +6,19 @@
 
 
 class TestDocumentLanguageClassifier:
+    @pytest.mark.unit
+    def test_init(self):
+        component = DocumentLanguageClassifier()
+        assert component.languages == ["en"]
+
     @pytest.mark.unit
     def test_to_dict(self):
+        component = DocumentLanguageClassifier()
+        data = component.to_dict()
+        assert data == {"type": "DocumentLanguageClassifier", "init_parameters": {"languages": ["en"]}}
+
+    @pytest.mark.unit
+    def test_to_dict_with_custom_init_parameters(self):
         component = DocumentLanguageClassifier(languages=["en", "de"])
         data = component.to_dict()
         assert data == {"type": "DocumentLanguageClassifier", "init_parameters": {"languages": ["en", "de"]}}