diff --git a/tests/framework/testUnits.cpp b/tests/framework/testUnits.cpp
index 67db321d8734fc488a833348dca02c120a831b52..a6f1d62ece1d3c11d625868807f1c9e477b7c24c 100644
--- a/tests/framework/testUnits.cpp
+++ b/tests/framework/testUnits.cpp
@@ -92,6 +92,8 @@ TEST_CASE("PhysicalUnits", "[Units]") {
 
     const auto E3 = E2 + 100_GeV + pow(10, lgE) * 1_GeV;
     CHECK(E3 == 180_GeV);
+
+    CHECK(sqrt(5_GeV * 5_GeV) / 5_GeV == Approx(1));
   }
 
   SECTION("Output") {