diff --git a/test/chrono-test.cc b/test/chrono-test.cc
index 8e2772fa..33c0c2c6 100644
--- a/test/chrono-test.cc
+++ b/test/chrono-test.cc
@@ -850,6 +850,30 @@ TEST(chrono_test, utc_clock) {
 }
 #endif
 
+TEST(chrono_test, timestamps_ratios) {
+  std::chrono::time_point<std::chrono::system_clock, std::chrono::milliseconds>
+      t1(std::chrono::milliseconds(67890));
+
+  EXPECT_EQ(fmt::format("{:%M:%S}", t1), "01:07.890");
+
+  std::chrono::time_point<std::chrono::system_clock, std::chrono::minutes>
+      t2(std::chrono::minutes(7));
+
+  EXPECT_EQ(fmt::format("{:%M:%S}", t2), "07:00");
+
+  std::chrono::time_point<std::chrono::system_clock, 
+                          std::chrono::duration<int, std::ratio<9>>>
+      t3(std::chrono::duration<int, std::ratio<9>>(7));
+
+  EXPECT_EQ(fmt::format("{:%M:%S}", t3), "01:03");
+
+  std::chrono::time_point<std::chrono::system_clock, 
+                          std::chrono::duration<int, std::ratio<63>>>
+      t4(std::chrono::duration<int, std::ratio<63>>(1));
+
+  EXPECT_EQ(fmt::format("{:%M:%S}", t4), "01:03");
+}
+
 TEST(chrono_test, timestamps_sub_seconds) {
   std::chrono::time_point<std::chrono::system_clock,
                           std::chrono::duration<long long, std::ratio<1, 3>>>