diff --git a/pandas/tests/reshape/concat/test_categorical.py b/pandas/tests/reshape/concat/test_categorical.py
index 5bafd2e8e8503..8c64d5e7b999f 100644
--- a/pandas/tests/reshape/concat/test_categorical.py
+++ b/pandas/tests/reshape/concat/test_categorical.py
@@ -1,5 +1,5 @@
 import numpy as np
-
+from datetime import datetime
 from pandas.core.dtypes.dtypes import CategoricalDtype
 
 import pandas as pd
@@ -169,6 +169,19 @@ def test_concat_categorical_tz(self):
         )
         tm.assert_series_equal(result, expected)
 
+    def test_concat_categorical_datetime(self):
+        # GH-39443
+        df1 = DataFrame(
+            {"x": Series(datetime(2021, 1, 1), index=[0], dtype="category")})
+        df2 = DataFrame(
+            {"x": Series(datetime(2021, 1, 2), index=[1], dtype="category")})
+
+        result = pd.concat([df1, df2])
+        expected = DataFrame(
+            {"x": Series([datetime(2021, 1, 1), datetime(2021, 1, 2)])})
+
+        tm.assert_equal(result, expected)
+
     def test_concat_categorical_unchanged(self):
         # GH-12007
         # test fix for when concat on categorical and float