diff --git a/test/util.cpp b/test/util.cpp
index 163bc7ac..a4ced680 100644
--- a/test/util.cpp
+++ b/test/util.cpp
@@ -226,6 +226,7 @@ BOOST_AUTO_TEST_CASE(format_time_minutes_test)
 	BOOST_CHECK_EQUAL(fmt(ts("10641906.007008009"), 1), "+123:04:05:06.0");
 	BOOST_CHECK_EQUAL(fmt(ts("10641906.007008009"), 2), "+123:04:05:06.01");
 	BOOST_CHECK_EQUAL(fmt(ts("10641906.007008009"), 3), "+123:04:05:06.007");
+	BOOST_CHECK_EQUAL(fmt(ts("10641906.999900000"), 3), "+123:04:05:07.000");
 	BOOST_CHECK_EQUAL(fmt(ts("10641906.007008009"), 4), "+123:04:05:06.007 0");
 	BOOST_CHECK_EQUAL(fmt(ts("10641906.007008009"), 5), "+123:04:05:06.007 01");
 	BOOST_CHECK_EQUAL(fmt(ts("10641906.007008009"), 6), "+123:04:05:06.007 008");