diff --git a/dedoc/config.py b/dedoc/config.py
index 3932b3fb..1e7cacc0 100644
--- a/dedoc/config.py
+++ b/dedoc/config.py
@@ -21,9 +21,9 @@
     # --------------------------------------------JOBLIB SETTINGS-------------------------------------------------------
     # number of parallel jobs in some tasks as OCR
     n_jobs=1,
-    
+
     # --------------------------------------------GPU SETTINGS-------------------------------------------------------
-    # set gpu in XGBoost and torch models 
+    # set gpu in XGBoost and torch models
     on_gpu=False,
 
     # ---------------------------------------------API SETTINGS---------------------------------------------------------
diff --git a/dedoc/readers/pdf_reader/pdf_auto_reader/txtlayer_classifier.py b/dedoc/readers/pdf_reader/pdf_auto_reader/txtlayer_classifier.py
index b91ce2b8..56386bdd 100644
--- a/dedoc/readers/pdf_reader/pdf_auto_reader/txtlayer_classifier.py
+++ b/dedoc/readers/pdf_reader/pdf_auto_reader/txtlayer_classifier.py
@@ -38,10 +38,9 @@ def __get_model(self) -> XGBClassifier:
             self.__model = pickle.load(f)
 
         if self.config.get("on_gpu", False):
-            self.__model.set_params(predictor="gpu_predictor", tree_method='auto', n_gpus=1, gpu_id=0)
+            self.__model.set_params(predictor="gpu_predictor", tree_method="auto", n_gpus=1, gpu_id=0)
             self.__model.get_booster().set_param(self.__model.get_params())
 
-
         return self.__model
 
     def predict(self, lines: List[LineWithMeta]) -> bool:
diff --git a/dedoc/readers/pdf_reader/pdf_image_reader/paragraph_extractor/scan_paragraph_classifier_extractor.py b/dedoc/readers/pdf_reader/pdf_image_reader/paragraph_extractor/scan_paragraph_classifier_extractor.py
index dbad92c6..221dea3e 100644
--- a/dedoc/readers/pdf_reader/pdf_image_reader/paragraph_extractor/scan_paragraph_classifier_extractor.py
+++ b/dedoc/readers/pdf_reader/pdf_image_reader/paragraph_extractor/scan_paragraph_classifier_extractor.py
@@ -45,7 +45,7 @@ def _unpickle(self) -> None:
             self._feature_extractor = ParagraphFeatureExtractor(**parameters, config=self.config)
         
         if self.config.get("on_gpu", False):
-            self._classifier.set_params(predictor="gpu_predictor", tree_method='auto', n_gpus=1, gpu_id=0)
+            self._classifier.set_params(predictor="gpu_predictor", tree_method="auto", n_gpus=1, gpu_id=0)
             self._classifier.get_booster().set_param(self._classifier.get_params())
 
     def extract(self, lines_with_links: List[LineWithLocation]) -> List[LineWithLocation]:
diff --git a/tests/unit_tests/test_my_gpu_tests.py b/tests/unit_tests/test_my_gpu_tests.py
index e80b43da..652d4578 100644
--- a/tests/unit_tests/test_my_gpu_tests.py
+++ b/tests/unit_tests/test_my_gpu_tests.py
@@ -7,15 +7,14 @@
 from dedoc.metadata_extractors.concrete_metadata_extractors.base_metadata_extractor import BaseMetadataExtractor
 from dedoc.readers.txt_reader.raw_text_reader import RawTextReader
 from dedoc.structure_extractors.concrete_structure_extractors.law_structure_excractor import LawStructureExtractor
-from tests.api_tests.abstract_api_test import AbstractTestApiDocReader
 from dedoc.readers.pdf_reader.pdf_image_reader.columns_orientation_classifier.columns_orientation_classifier import ColumnsOrientationClassifier
-
+from tests.api_tests.abstract_api_test import AbstractTestApiDocReader
 from tests.test_utils import get_test_config
 
+
 @unittest.skip("Should load gpu")
 class MyGPUTests(AbstractTestApiDocReader):
     config = dict(on_gpu=True)
-    
 
     def _get_abs_path(self, file_name: str) -> str:
         return os.path.join(self.data_directory_path, "laws", file_name)
@@ -37,7 +36,6 @@ def test_law_document_spaces_correctness(self) -> None:
         self.assertListEqual([], document.attachments)
         self.assertListEqual([], document.tables)
 
-
     def test_skew_corrector(self) -> None:
         checkpoint_path = get_test_config()["resources_path"]
         orientation_classifier = ColumnsOrientationClassifier(on_gpu=self.config.get("on_gpu", False), checkpoint_path=checkpoint_path, config=self.config)