diff --git a/tests/test-minirst.py b/tests/test-minirst.py
--- a/tests/test-minirst.py
+++ b/tests/test-minirst.py
@@ -181,3 +181,10 @@ debugformat('containers (verbose debug)'
 
 roles = """Please see :hg:`add`."""
 debugformat('roles', roles, 60)
+
+
+sections = """
+A Somewhat Wide Section Header
+------------------------------
+"""
+debugformat('sections', sections, 20)
diff --git a/tests/test-minirst.py.out b/tests/test-minirst.py.out
--- a/tests/test-minirst.py.out
+++ b/tests/test-minirst.py.out
@@ -303,3 +303,9 @@ roles formatted to fit within 60 charact
 Please see "hg add".
 ----------------------------------------------------------------------
 
+sections formatted to fit within 20 characters:
+----------------------------------------------------------------------
+A Somewhat Wide Section Header
+------------------------------
+----------------------------------------------------------------------
+