diff --git a/test/dataset/test_tsf_reader.py b/test/dataset/test_tsf_reader.py
index 2261d7ebfc..686b3f4d2c 100644
--- a/test/dataset/test_tsf_reader.py
+++ b/test/dataset/test_tsf_reader.py
@@ -20,10 +20,10 @@
     "input_freq_str, output_freq_str",
     [
         ("30_seconds", "30S"),
-        ("minutely", "T"),
-        ("10_minutes", "10T"),
-        ("hourly", "H"),
-        ("half_hourly", "0.5H"),
+        ("minutely", "min"),
+        ("10_minutes", "10min"),
+        ("hourly", "h"),
+        ("half_hourly", "0.5h"),
         ("daily", "D"),
         ("7_days", "7D"),
         ("weekly", "W"),