diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6ee01f5..a8b3504 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Removed last grouping step when using `keep_all_tags` parameter with `GroupedOsmTagsFilter` filter
+
 ## [0.4.1] - 2024-01-31
 
 ### Changed
diff --git a/quackosm/_osm_tags_filters.py b/quackosm/_osm_tags_filters.py
index 6da8fba..8b951d8 100644
--- a/quackosm/_osm_tags_filters.py
+++ b/quackosm/_osm_tags_filters.py
@@ -52,14 +52,12 @@ def merge_osm_tags_filter(
     elif is_expected_type(osm_tags_filter, GroupedOsmTagsFilter):
         return _merge_grouped_osm_tags_filter(cast(GroupedOsmTagsFilter, osm_tags_filter))
     elif is_expected_type(osm_tags_filter, Iterable):
-        return _merge_multiple_osm_tags_filters(
-            [
-                merge_osm_tags_filter(
-                    cast(Union[OsmTagsFilter, GroupedOsmTagsFilter], sub_osm_tags_filter)
-                )
-                for sub_osm_tags_filter in osm_tags_filter
-            ]
-        )
+        return _merge_multiple_osm_tags_filters([
+            merge_osm_tags_filter(
+                cast(Union[OsmTagsFilter, GroupedOsmTagsFilter], sub_osm_tags_filter)
+            )
+            for sub_osm_tags_filter in osm_tags_filter
+        ])
 
     raise AttributeError(
         "Provided tags don't match required type definitions"
diff --git a/quackosm/_rich_progress.py b/quackosm/_rich_progress.py
index dab370b..454362e 100644
--- a/quackosm/_rich_progress.py
+++ b/quackosm/_rich_progress.py
@@ -68,7 +68,7 @@ def render(self, task: "Task") -> Text:
                     elif task.speed >= 1:
                         return Text(f"{task.speed:.2f} it/s")
                     else:
-                        return Text(f"{1/task.speed:.2f} s/it") # noqa: FURB126
+                        return Text(f"{1/task.speed:.2f} s/it")  # noqa: FURB126
 
             self.progress = Progress(
                 SpinnerColumn(),
diff --git a/quackosm/osm_extracts/geofabrik.py b/quackosm/osm_extracts/geofabrik.py
index 0c17eec..201c451 100644
--- a/quackosm/osm_extracts/geofabrik.py
+++ b/quackosm/osm_extracts/geofabrik.py
@@ -16,6 +16,7 @@
 
 __all__ = ["_get_geofabrik_index"]
 
+
 def _get_geofabrik_index() -> gpd.GeoDataFrame:
     global GEOFABRIK_INDEX_GDF  # noqa: PLW0603
 
@@ -39,7 +40,9 @@ def _load_geofabrik_index() -> gpd.GeoDataFrame:
     else:
         result = requests.get(
             GEOFABRIK_INDEX_URL,
-            headers={"User-Agent": "QuackOSM Python package (https://github.com/kraina-ai/quackosm)"},
+            headers={
+                "User-Agent": "QuackOSM Python package (https://github.com/kraina-ai/quackosm)"
+            },
         )
         parsed_data = json.loads(result.text)
         gdf = gpd.GeoDataFrame.from_features(parsed_data["features"])
diff --git a/quackosm/pbf_file_reader.py b/quackosm/pbf_file_reader.py
index 0b24b35..987d45b 100644
--- a/quackosm/pbf_file_reader.py
+++ b/quackosm/pbf_file_reader.py
@@ -1659,7 +1659,9 @@ def _concatenate_results_to_geoparquet(
             FROM ({parsed_geometries.sql_query()})
         """)
 
-        grouped_features = self._parse_features_relation_to_groups(unioned_features, explode_tags)
+        grouped_features = self._parse_features_relation_to_groups(
+            unioned_features, keep_all_tags=keep_all_tags, explode_tags=explode_tags
+        )
 
         valid_features_full_relation = self.connection.sql(f"""
             SELECT * FROM ({grouped_features.sql_query()})
@@ -1870,6 +1872,7 @@ def _parse_features_relation_to_groups(
         self,
         features_relation: "duckdb.DuckDBPyRelation",
         explode_tags: bool,
+        keep_all_tags: bool,
     ) -> "duckdb.DuckDBPyRelation":
         """
         Optionally group raw OSM features into groups defined in `GroupedOsmTagsFilter`.
@@ -1883,11 +1886,19 @@ def _parse_features_relation_to_groups(
         Args:
             features_relation (duckdb.DuckDBPyRelation): Generated features from the loader.
             explode_tags (bool): Whether to split tags into columns based on OSM tag keys.
+            keep_all_tags (bool): Works only with the `tags_filter` parameter.
+                Whether to keep all tags related to the element, or return only those defined
+                in the `tags_filter`. When `True`, will override the optional grouping defined
+                in the `tags_filter`. Defaults to `False`.
 
         Returns:
             duckdb.DuckDBPyRelation: Parsed features_relation.
         """
-        if not self.tags_filter or not is_expected_type(self.tags_filter, GroupedOsmTagsFilter):
+        if (
+            not self.tags_filter
+            or not is_expected_type(self.tags_filter, GroupedOsmTagsFilter)
+            or keep_all_tags
+        ):
             return features_relation
 
         grouped_features_relation: "duckdb.DuckDBPyRelation"
diff --git a/tests/base/test_pbf_file_reader.py b/tests/base/test_pbf_file_reader.py
index cea2768..0b97832 100644
--- a/tests/base/test_pbf_file_reader.py
+++ b/tests/base/test_pbf_file_reader.py
@@ -101,6 +101,24 @@ def test_pbf_reader(
     )
 
 
+@pytest.mark.parametrize("tags_filter", [None, HEX2VEC_FILTER, GEOFABRIK_LAYERS])  # type: ignore
+@pytest.mark.parametrize("explode_tags", [None, True, False])  # type: ignore
+@pytest.mark.parametrize("keep_all_tags", [True, False])  # type: ignore
+def test_pbf_to_geoparquet_parsing(
+    tags_filter: Optional[Union[OsmTagsFilter, GroupedOsmTagsFilter]],
+    explode_tags: Optional[bool],
+    keep_all_tags: bool,
+):
+    """Test if pbf to geoparquet conversion works."""
+    pbf_file = Path(__file__).parent.parent / "test_files" / "monaco.osm.pbf"
+    PbfFileReader(tags_filter=tags_filter).get_features_gdf(
+        file_paths=pbf_file,
+        ignore_cache=True,
+        explode_tags=explode_tags,
+        keep_all_tags=keep_all_tags,
+    )
+
+
 def test_pbf_reader_geometry_filtering():  # type: ignore
     """Test proper spatial data filtering in `PbfFileReader`."""
     file_name = "d17f922ed15e9609013a6b895e1e7af2d49158f03586f2c675d17b760af3452e.osm.pbf"