diff --git a/tests/test_contracts/test_contracts.py b/tests/test_contracts/test_contracts.py
index 77801f8f..34f970a2 100644
--- a/tests/test_contracts/test_contracts.py
+++ b/tests/test_contracts/test_contracts.py
@@ -243,7 +243,7 @@ def parameter_int(num: int) -> None:
 
 
 @check_contracts
-def _my_sum_one_precondition(numbers: list[int]) -> int:
+def _my_sum_one_precondition(numbers: List[int]) -> int:
     """Return the sum of a list of numbers.
 
     Precondition: len(numbers) > 2
@@ -402,7 +402,7 @@ def test_invalid_typing_generic_argument() -> None:
     """
 
     @check_contracts
-    def unary(arg: list[str]) -> None:
+    def unary(arg: List[str]) -> None:
         return
 
     with pytest.raises(AssertionError):
@@ -455,7 +455,7 @@ def test_get_double_disabled_contract_checking(disable_contract_checking) -> Non
 
 # Test that postcondition checks involving function parameters pass and fail as expected
 @check_contracts
-def _add_to_set_valid(num_set: set[int], new_num: int) -> None:
+def _add_to_set_valid(num_set: Set[int], new_num: int) -> None:
     """
     Add a number to the provided set if the number does not already exist in the set.
 
@@ -467,7 +467,7 @@ def _add_to_set_valid(num_set: set[int], new_num: int) -> None:
 
 
 @check_contracts
-def _add_to_set_invalid(num_set: set[int], new_num: int) -> None:
+def _add_to_set_invalid(num_set: Set[int], new_num: int) -> None:
     """
     Add new_num to the num_set. This is implemented incorrectly to make the postcondition check fail.
 
@@ -498,7 +498,7 @@ def test_add_to_set_invalid() -> None:
 
 # Test that postcondition checks that use custom functions in scope pass and fail as expected
 @check_contracts
-def _get_even_nums_valid(lst: list[int]) -> list[int]:
+def _get_even_nums_valid(lst: List[int]) -> List[int]:
     """
     Return a list of all even numbers in the input list.
 
@@ -508,7 +508,7 @@ def _get_even_nums_valid(lst: list[int]) -> list[int]:
 
 
 @check_contracts
-def _get_even_nums_invalid(lst: list[int]) -> list[int]:
+def _get_even_nums_invalid(lst: List[int]) -> List[int]:
     """
     Return a list of all odd numbers in the input list, which should cause the postcondition check to fail.
 
diff --git a/tests/test_contracts/test_contracts_type_alias_abstract_network.py b/tests/test_contracts/test_contracts_type_alias_abstract_network.py
index 57c9ef01..10bd78f1 100644
--- a/tests/test_contracts/test_contracts_type_alias_abstract_network.py
+++ b/tests/test_contracts/test_contracts_type_alias_abstract_network.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import Union
+from typing import Dict, Union
 
 # This creates a type alias, to save us typing "Union[int, tuple]" everywhere
 NodeAddress = Union[int, tuple]
@@ -20,7 +20,7 @@ def __init__(self, address: NodeAddress) -> None:
 # The AbstractNetwork class
 ###############################################################################
 class AbstractNetwork:
-    _nodes: dict[NodeAddress, Node]
+    _nodes: Dict[NodeAddress, Node]
 
     def __init__(self) -> None:
         self._nodes = {}
diff --git a/tests/test_custom_checkers/test_type_annotation_checker.py b/tests/test_custom_checkers/test_type_annotation_checker.py
index 3eb4b553..746a62b2 100644
--- a/tests/test_custom_checkers/test_type_annotation_checker.py
+++ b/tests/test_custom_checkers/test_type_annotation_checker.py
@@ -12,11 +12,11 @@ def test_type_is_assigned_for_function(self):
         """Ensure that checker catches when type is assigned instead of annotated
         in function parameters."""
         src = """
-        from __future__ import annotations
+        from typing import List
 
         def add_two_numbers(
             x=int, # Error on this line
-            y=list[float], # Error on this line
+            y=List[float], # Error on this line
             z: type = complex # No error on this line
         ) -> int:
             return (x + y) * z
diff --git a/tests/test_validate_invariants.py b/tests/test_validate_invariants.py
index bec5d376..e4150372 100644
--- a/tests/test_validate_invariants.py
+++ b/tests/test_validate_invariants.py
@@ -4,6 +4,8 @@
 
 from __future__ import annotations
 
+from typing import List
+
 import pytest
 
 from python_ta.contracts import check_contracts, validate_invariants
@@ -20,9 +22,9 @@ class Person:
 
     given_name: str
     age: int
-    friends: list[str]
+    friends: List[str]
 
-    def __init__(self, given_name: str, age: int, friends: list[str]) -> None:
+    def __init__(self, given_name: str, age: int, friends: List[str]) -> None:
         """Initialize a new Person object."""
         self.given_name = given_name
         self.age = age