diff --git a/python_modules/dagster/dagster/_core/definitions/time_window_partitions.py b/python_modules/dagster/dagster/_core/definitions/time_window_partitions.py
index 32d9f4565d89f..396c46baa289b 100644
--- a/python_modules/dagster/dagster/_core/definitions/time_window_partitions.py
+++ b/python_modules/dagster/dagster/_core/definitions/time_window_partitions.py
@@ -734,7 +734,7 @@ def less_than(self, partition_key1: str, partition_key2: str) -> bool:
 
     @property
     def partitions_subset_class(self) -> Type["PartitionsSubset"]:
-        return UnresolvedTimeWindowPartitionsSubset
+        return TimePartitionKeyPartitionsSubset
 
     def empty_subset(self) -> "PartitionsSubset":
         return self.partitions_subset_class.empty_subset(self)
@@ -1647,7 +1647,7 @@ def __eq__(self, other):
         )
 
 
-class UnresolvedTimeWindowPartitionsSubset(BaseTimeWindowPartitionsSubset):
+class TimePartitionKeyPartitionsSubset(BaseTimeWindowPartitionsSubset):
     def __init__(
         self,
         partitions_def: TimeWindowPartitionsDefinition,
@@ -1664,7 +1664,7 @@ def with_partition_keys(
         self, partition_keys: Iterable[str]
     ) -> "BaseTimeWindowPartitionsSubset":
         new_partitions = {*(self._included_partition_keys or []), *partition_keys}
-        return UnresolvedTimeWindowPartitionsSubset(
+        return TimePartitionKeyPartitionsSubset(
             self._partitions_def,
             included_partition_keys=new_partitions,
         )
@@ -1744,10 +1744,10 @@ def __contains__(self, partition_key: str) -> bool:
 
     def __eq__(self, other):
         return (
-            isinstance(other, UnresolvedTimeWindowPartitionsSubset)
+            isinstance(other, TimePartitionKeyPartitionsSubset)
             and self.partitions_def == other.partitions_def
             and self._included_partition_keys == other._included_partition_keys
-        ) or super(UnresolvedTimeWindowPartitionsSubset, self).__eq__(other)
+        ) or super(TimePartitionKeyPartitionsSubset, self).__eq__(other)
 
     @classmethod
     def empty_subset(cls, partitions_def: PartitionsDefinition) -> "PartitionsSubset":
@@ -1764,7 +1764,7 @@ def with_partitions_def(
             "num_partitions would become inaccurate if the partitions_defs had different cron"
             " schedules",
         )
-        return UnresolvedTimeWindowPartitionsSubset(
+        return TimePartitionKeyPartitionsSubset(
             partitions_def=partitions_def,
             included_partition_keys=self._included_partition_keys,
         )
diff --git a/python_modules/dagster/dagster_tests/asset_defs_tests/test_partitions_subset.py b/python_modules/dagster/dagster_tests/asset_defs_tests/test_partitions_subset.py
index 1d7696e0ca92d..104215fa886f1 100644
--- a/python_modules/dagster/dagster_tests/asset_defs_tests/test_partitions_subset.py
+++ b/python_modules/dagster/dagster_tests/asset_defs_tests/test_partitions_subset.py
@@ -3,8 +3,8 @@
 from dagster._core.definitions.multi_dimensional_partitions import MultiPartitionsSubset
 from dagster._core.definitions.partition import DefaultPartitionsSubset
 from dagster._core.definitions.time_window_partitions import (
+    TimePartitionKeyPartitionsSubset,
     TimeWindowPartitionsSubset,
-    UnresolvedTimeWindowPartitionsSubset,
 )
 from dagster._core.errors import DagsterInvalidDeserializationVersionError
 
@@ -78,4 +78,4 @@ def test_get_subset_type():
 def test_empty_subsets():
     assert type(composite.empty_subset()) is MultiPartitionsSubset
     assert type(static_partitions.empty_subset()) is DefaultPartitionsSubset
-    assert type(time_window_partitions.empty_subset()) is UnresolvedTimeWindowPartitionsSubset
+    assert type(time_window_partitions.empty_subset()) is TimePartitionKeyPartitionsSubset
diff --git a/python_modules/dagster/dagster_tests/definitions_tests/test_time_window_partitions.py b/python_modules/dagster/dagster_tests/definitions_tests/test_time_window_partitions.py
index db418ad82f189..1f57f1ec08918 100644
--- a/python_modules/dagster/dagster_tests/definitions_tests/test_time_window_partitions.py
+++ b/python_modules/dagster/dagster_tests/definitions_tests/test_time_window_partitions.py
@@ -21,9 +21,9 @@
 from dagster._core.definitions.time_window_partitions import (
     BaseTimeWindowPartitionsSubset,
     ScheduleType,
+    TimePartitionKeyPartitionsSubset,
     TimeWindow,
     TimeWindowPartitionsSubset,
-    UnresolvedTimeWindowPartitionsSubset,
 )
 from dagster._seven.compat.pendulum import create_pendulum_time
 from dagster._utils.partitions import DEFAULT_HOURLY_FORMAT_WITHOUT_TIMEZONE
@@ -745,7 +745,7 @@ def test_start_not_aligned():
 
 @pytest.mark.parametrize(
     "partitions_subset_class",
-    [UnresolvedTimeWindowPartitionsSubset, TimeWindowPartitionsSubset],
+    [TimePartitionKeyPartitionsSubset, TimeWindowPartitionsSubset],
 )
 @pytest.mark.parametrize(
     "case_str",
@@ -822,7 +822,7 @@ def test_time_partitions_subset_identical_serialization():
 
 @pytest.mark.parametrize(
     "partitions_subset_class",
-    [UnresolvedTimeWindowPartitionsSubset, TimeWindowPartitionsSubset],
+    [TimePartitionKeyPartitionsSubset, TimeWindowPartitionsSubset],
 )
 @pytest.mark.parametrize(
     "initial, added",