diff --git a/python_tests/preferential/test_study.py b/python_tests/preferential/test_study.py
index 7fc1aaba..9b4a3f31 100644
--- a/python_tests/preferential/test_study.py
+++ b/python_tests/preferential/test_study.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 import copy
 import multiprocessing
 import pickle
+import sys
 from typing import Callable
 from unittest.mock import patch
 import uuid
@@ -22,6 +23,10 @@ from ..storage_supplier import parametrize_storages
 from ..storage_supplier import StorageSupplier
 
 
+if sys.version_info < (3, 8):
+    pytest.skip("BoTorch dropped Python3.7 support", allow_module_level=True)
+
+
 @parametrize_storages
 def test_study_set_and_get_user_attrs(storage_supplier: Callable[[], StorageSupplier]) -> None:
     with storage_supplier() as storage:
diff --git a/python_tests/test_api.py b/python_tests/test_api.py
index f9c56e4f..bde7838a 100644
--- a/python_tests/test_api.py
+++ b/python_tests/test_api.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import json
+import sys
 from unittest import TestCase
 
 import optuna
@@ -14,6 +15,7 @@ from optuna_dashboard._preferential_history import remove_history
 from optuna_dashboard._preferential_history import report_history
 from optuna_dashboard._serializer import serialize_preference_history
 from optuna_dashboard.preferential import create_study
+import pytest
 
 from .wsgi_client import send_request
 
@@ -105,6 +107,7 @@ class APITestCase(TestCase):
         )
         self.assertEqual(status, 400)
 
+    @pytest.mark.skipif(sys.version_info < (3, 8), reason="BoTorch dropped Python3.7 support")
     def test_get_best_trials_of_preferential_study(self) -> None:
         storage = optuna.storages.InMemoryStorage()
         study = create_study(n_generate=4, storage=storage)
@@ -128,6 +131,7 @@ class APITestCase(TestCase):
         assert len(best_trials) == 1
         assert best_trials[0]["number"] == 0
 
+    @pytest.mark.skipif(sys.version_info < (3, 8), reason="BoTorch dropped Python3.7 support")
     def test_report_preference(self) -> None:
         storage = optuna.storages.InMemoryStorage()
         study = create_study(n_generate=4, storage=storage)
@@ -161,6 +165,7 @@ class APITestCase(TestCase):
         assert better.number == 2
         assert worse.number == 1
 
+    @pytest.mark.skipif(sys.version_info < (3, 8), reason="BoTorch dropped Python3.7 support")
     def test_report_preference_when_typo_mode(self) -> None:
         storage = optuna.storages.InMemoryStorage()
         study = create_study(storage=storage, n_generate=3)
@@ -184,6 +189,7 @@ class APITestCase(TestCase):
         )
         self.assertEqual(status, 400)
 
+    @pytest.mark.skipif(sys.version_info < (3, 8), reason="BoTorch dropped Python3.7 support")
     def test_change_component(self) -> None:
         storage = optuna.storages.InMemoryStorage()
         study = create_study(storage=storage, n_generate=3)
@@ -214,6 +220,7 @@ class APITestCase(TestCase):
         assert study_detail["feedback_component_type"]["output_type"] == "artifact"
         assert study_detail["feedback_component_type"]["artifact_key"] == "image"
 
+    @pytest.mark.skipif(sys.version_info < (3, 8), reason="BoTorch dropped Python3.7 support")
     def test_skip_trial(self) -> None:
         storage = optuna.storages.InMemoryStorage()
         study = create_study(n_generate=4, storage=storage)
@@ -238,6 +245,7 @@ class APITestCase(TestCase):
         assert len(best_trials) == 1
         assert best_trials[0].number == 2
 
+    @pytest.mark.skipif(sys.version_info < (3, 8), reason="BoTorch dropped Python3.7 support")
     def test_remove_history(self) -> None:
         storage = optuna.storages.InMemoryStorage()
         study = create_study(storage=storage, n_generate=3)
@@ -271,6 +279,7 @@ class APITestCase(TestCase):
         assert histories[0]["is_removed"]
         assert len(study.get_preferences()) == 0
 
+    @pytest.mark.skipif(sys.version_info < (3, 8), reason="BoTorch dropped Python3.7 support")
     def test_restore_history(self) -> None:
         storage = optuna.storages.InMemoryStorage()
         study = create_study(storage=storage, n_generate=3)
diff --git a/python_tests/test_preferential_history.py b/python_tests/test_preferential_history.py
index 3d1a7d70..dcae4797 100644
--- a/python_tests/test_preferential_history.py
+++ b/python_tests/test_preferential_history.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import json
+import sys
 from typing import Callable
 from typing import TYPE_CHECKING
 
@@ -13,6 +14,7 @@ from optuna_dashboard._preferential_history import restore_history
 from optuna_dashboard._serializer import serialize_preference_history
 from optuna_dashboard.preferential import create_study
 from optuna_dashboard.preferential._system_attrs import _SYSTEM_ATTR_PREFIX_PREFERENCE
+import pytest
 
 from .storage_supplier import parametrize_storages
 from .storage_supplier import StorageSupplier
@@ -22,6 +24,10 @@ if TYPE_CHECKING:
     from optuna_dashboard._preferential_history import History
 
 
+if sys.version_info < (3, 8):
+    pytest.skip("BoTorch dropped Python3.7 support", allow_module_level=True)
+
+
 @parametrize_storages
 def test_report_and_get_choices(storage_supplier: Callable[[], StorageSupplier]) -> None:
     with storage_supplier() as storage:
diff --git a/python_tests/test_serializers.py b/python_tests/test_serializers.py
index ea1c3517..0d1546d2 100644
--- a/python_tests/test_serializers.py
+++ b/python_tests/test_serializers.py
@@ -1,11 +1,14 @@
 from __future__ import annotations
 
+import sys
+
 import optuna
 from optuna_dashboard._serializer import serialize_attrs
 from optuna_dashboard._serializer import serialize_study_detail
 from optuna_dashboard._serializer import serialize_study_summary
 from optuna_dashboard._storage import get_study_summaries
 from optuna_dashboard.preferential import create_study
+import pytest
 
 
 def test_serialize_bytes() -> None:
@@ -22,6 +25,7 @@ def test_serialize_dict() -> None:
     assert len(serialized) <= 1
 
 
+@pytest.mark.skipif(sys.version_info < (3, 8), reason="BoTorch dropped Python3.7 support")
 def test_get_study_detail_is_preferential() -> None:
     storage = optuna.storages.InMemoryStorage()
     study = create_study(n_generate=4, storage=storage)
@@ -48,6 +52,7 @@ def test_get_study_detail_is_not_preferential() -> None:
     assert not study_detail["is_preferential"]
 
 
+@pytest.mark.skipif(sys.version_info < (3, 8), reason="BoTorch dropped Python3.7 support")
 def test_get_study_summary_is_preferential() -> None:
     storage = optuna.storages.InMemoryStorage()
     create_study(n_generate=4, storage=storage)