diff --git a/tests/humanize_tests/tests.py b/tests/humanize_tests/tests.py
index 2414a55ed7..25cd07bac7 100644
--- a/tests/humanize_tests/tests.py
+++ b/tests/humanize_tests/tests.py
@@ -290,28 +290,46 @@ class HumanizeTests(SimpleTestCase):
         finally:
             humanize.datetime = orig_humanize_datetime
 
-    def test_dative_inflection_for_timedelta(self):
-        """Translation may differ depending on the string it is inserted in."""
+    def test_inflection_for_timedelta(self):
+        """
+        Translation of '%d day'/'%d month'/… may differ depending on the context
+        of the string it is inserted in.
+        """
         test_list = [
+            # "%(delta)s ago" translations
             now - datetime.timedelta(days=1),
             now - datetime.timedelta(days=2),
             now - datetime.timedelta(days=30),
             now - datetime.timedelta(days=60),
             now - datetime.timedelta(days=500),
             now - datetime.timedelta(days=865),
+            # "%(delta)s from now" translations
+            now + datetime.timedelta(days=1),
+            now + datetime.timedelta(days=2),
+            now + datetime.timedelta(days=30),
+            now + datetime.timedelta(days=60),
+            now + datetime.timedelta(days=500),
+            now + datetime.timedelta(days=865),
         ]
         result_list = [
-            'vor 1\xa0Tag',
-            'vor 2\xa0Tagen',
-            'vor 1\xa0Monat',
-            'vor 2\xa0Monaten',
-            'vor 1\xa0Jahr, 4\xa0Monaten',
-            'vor 2\xa0Jahren, 4\xa0Monaten',
+            'před 1\xa0dnem',
+            'před 2\xa0dny',
+            'před 1\xa0měsícem',
+            'před 2\xa0měsíci',
+            'před 1\xa0rokem, 4\xa0měsíci',
+            'před 2\xa0lety, 4\xa0měsíci',
+            'za 1\xa0den',
+            'za 2\xa0dny',
+            'za 1\xa0měsíc',
+            'za 2\xa0měsíce',
+            'za 1\xa0rok, 4\xa0měsíce',
+            'za 2\xa0roky, 4\xa0měsíce',
         ]
 
         orig_humanize_datetime, humanize.datetime = humanize.datetime, MockDateTime
         try:
-            with translation.override('de'), self.settings(USE_L10N=True):
+            # Choose a language with different naturaltime-past/naturaltime-future translations
+            with translation.override('cs'), self.settings(USE_L10N=True):
                 self.humanize_tester(test_list, result_list, 'naturaltime')
         finally:
             humanize.datetime = orig_humanize_datetime