diff --git a/test/unit_test/static/quantity_test.cpp b/test/unit_test/static/quantity_test.cpp
index 3636cf32..7de30728 100644
--- a/test/unit_test/static/quantity_test.cpp
+++ b/test/unit_test/static/quantity_test.cpp
@@ -272,6 +272,8 @@ static_assert((7m % 2).count() == 1);
 static_assert((7m % 2m).count() == 1);
 static_assert((7km % 2000m).count() == 1000);
 
+static_assert((10sq_km * 10sq_km) / 50sq_km == 2sq_km);
+
 // comparators
 
 static_assert(2m + 1m == 3m);