diff --git a/test/static/chrono_test.cpp b/test/static/chrono_test.cpp
index edf0be12..92633d92 100644
--- a/test/static/chrono_test.cpp
+++ b/test/static/chrono_test.cpp
@@ -101,6 +101,16 @@ static_assert(
 static_assert(is_of_type<quantity_point{sys_days{sys_days::duration{1}}},
                          time_point<si::day, std::chrono::system_clock, sys_days::rep>>);
 
+// conversion to chrono
+static_assert(
+  std::constructible_from<std::chrono::seconds, quantity<isq::time[si::second], std::chrono::seconds::rep>>);
+static_assert(std::convertible_to<quantity<isq::time[si::second], std::chrono::seconds::rep>, std::chrono::seconds>);
+static_assert(std::constructible_from<std::chrono::hours, quantity<isq::time[si::hour], std::chrono::hours::rep>>);
+static_assert(std::convertible_to<quantity<isq::time[si::hour], std::chrono::hours::rep>, std::chrono::hours>);
+static_assert(
+  std::constructible_from<sys_seconds, time_point<si::second, std::chrono::system_clock, sys_seconds::rep>>);
+static_assert(std::convertible_to<time_point<si::second, std::chrono::system_clock, sys_seconds::rep>, sys_seconds>);
+
 // units mapping
 static_assert(quantity{1ns} == 1 * ns);
 static_assert(quantity{1us} == 1 * us);