diff --git a/quantile_forest/tests/test_quantile_forest.py b/quantile_forest/tests/test_quantile_forest.py
index 2b04af5..ce4bde0 100755
--- a/quantile_forest/tests/test_quantile_forest.py
+++ b/quantile_forest/tests/test_quantile_forest.py
@@ -4,7 +4,7 @@
 
 import math
 import warnings
-from typing import Any
+from typing import Any, Dict
 
 import numpy as np
 import pytest
@@ -41,7 +41,7 @@
 X_california = california.data[perm]
 y_california = california.target[perm]
 
-FOREST_REGRESSORS: dict[str, Any] = {
+FOREST_REGRESSORS: Dict[str, Any] = {
     "ExtraTreesQuantileRegressor": ExtraTreesQuantileRegressor,
     "RandomForestQuantileRegressor": RandomForestQuantileRegressor,
 }