diff --git a/Lib/test/test_calendar.py b/Lib/test/test_calendar.py
index 3d9dcf12f2dad8..ccfbeede0be949 100644
--- a/Lib/test/test_calendar.py
+++ b/Lib/test/test_calendar.py
@@ -568,11 +568,15 @@ def test_locale_calendar_formatweekday(self):
         try:
             # formatweekday uses different day names based on the available width.
             cal = calendar.LocaleTextCalendar(locale='en_US')
+            # For really short widths, the abbreviated name is truncated.
+            self.assertEqual(cal.formatweekday(0, 1), "M")
+            self.assertEqual(cal.formatweekday(0, 2), "Mo")
             # For short widths, a centered, abbreviated name is used.
+            self.assertEqual(cal.formatweekday(0, 3), "Mon")
             self.assertEqual(cal.formatweekday(0, 5), " Mon ")
-            # For really short widths, even the abbreviated name is truncated.
-            self.assertEqual(cal.formatweekday(0, 2), "Mo")
+            self.assertEqual(cal.formatweekday(0, 8), "  Mon   ")
             # For long widths, the full day name is used.
+            self.assertEqual(cal.formatweekday(0, 9), "  Monday ")
             self.assertEqual(cal.formatweekday(0, 10), "  Monday  ")
         except locale.Error:
             raise unittest.SkipTest('cannot set the en_US locale')
diff --git a/Misc/NEWS.d/next/Tests/2023-01-27-18-10-40.gh-issue-101377.IJGpqh.rst b/Misc/NEWS.d/next/Tests/2023-01-27-18-10-40.gh-issue-101377.IJGpqh.rst
new file mode 100644
index 00000000000000..a9c19ce060e3ab
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2023-01-27-18-10-40.gh-issue-101377.IJGpqh.rst
@@ -0,0 +1 @@
+Improved test_locale_calendar_formatweekday of calendar.