diff --git a/tests/test_transforms/test_encoders/test_segment_encoder_transform.py b/tests/test_transforms/test_encoders/test_segment_encoder_transform.py
index 60574b904..fa869d9d8 100644
--- a/tests/test_transforms/test_encoders/test_segment_encoder_transform.py
+++ b/tests/test_transforms/test_encoders/test_segment_encoder_transform.py
@@ -2,21 +2,20 @@
 import pandas as pd
 import pytest
 
-from etna.datasets import TSDataset
 from etna.transforms import SegmentEncoderTransform
 from tests.test_transforms.utils import assert_transformation_equals_loaded_original
 from tests.utils import select_segments_subset
 
 
-def test_segment_encoder_transform(simple_ts):
+def test_segment_encoder_transform(mean_segment_encoder_ts):
     transform = SegmentEncoderTransform()
-    transformed_df = transform.fit_transform(simple_ts).to_pandas()
+    transformed_df = transform.fit_transform(mean_segment_encoder_ts).to_pandas()
     assert (
         len(transformed_df.loc[:, pd.IndexSlice[:, "segment_code"]].columns) == 2
     ), "Number of columns not the same as segments"
-    assert len(simple_ts.to_pandas()) == len(transformed_df), "Row missing"
+    assert len(mean_segment_encoder_ts.to_pandas()) == len(transformed_df), "Row missing"
     codes = set()
-    for segment in simple_ts.segments:
+    for segment in mean_segment_encoder_ts.segments:
         column = transformed_df.loc[:, pd.IndexSlice[segment, "segment_code"]]
         assert column.dtype == "category", "Column type is not category"
         assert np.all(column == column.iloc[0]), "Values are not the same for the whole column"
@@ -24,32 +23,15 @@ def test_segment_encoder_transform(simple_ts):
     assert codes == {0, 1}, "Codes are not 0 and 1"
 
 
-def test_subset_segments(simple_ts):
-    train_ts = simple_ts
-    test_df = simple_ts.loc[:, pd.IndexSlice["Omsk", :]]
-    test_ts = TSDataset(df=test_df, freq=simple_ts.freq)
-    transform = SegmentEncoderTransform()
-
-    transform.fit(train_ts)
-    transformed_test_df = transform.transform(test_ts).to_pandas()
-
-    segments = sorted(transformed_test_df.columns.get_level_values("segment").unique())
-    features = sorted(transformed_test_df.columns.get_level_values("feature").unique())
-    assert segments == ["Omsk"]
-    assert features == ["exog", "segment_code", "target"]
-    values = transformed_test_df.loc[:, pd.IndexSlice[:, "segment_code"]]
-    assert np.all(values == values.iloc[0])
-
-
-def test_not_fitted_error(simple_ts):
+def test_not_fitted_error(mean_segment_encoder_ts):
     encoder = SegmentEncoderTransform()
     with pytest.raises(ValueError, match="The transform isn't fitted"):
-        encoder.transform(simple_ts)
+        encoder.transform(mean_segment_encoder_ts)
 
 
-def test_new_segments_error(simple_ts):
-    train_ts = select_segments_subset(ts=simple_ts, segments=["Moscow"])
-    test_ts = select_segments_subset(ts=simple_ts, segments=["Omsk"])
+def test_new_segments_error(mean_segment_encoder_ts):
+    train_ts = select_segments_subset(ts=mean_segment_encoder_ts, segments=["segment_0"])
+    test_ts = select_segments_subset(ts=mean_segment_encoder_ts, segments=["segment_1"])
     transform = SegmentEncoderTransform()
 
     transform.fit(train_ts)