diff --git a/src/tests.rs b/src/tests.rs
index 0eebedf..cdd8568 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -210,4 +210,5 @@ fn complex_units() {
 	good_expr("62.137 mi/h", "100 km/h to mph");
 	good_expr("20 mi", "10 mph * 2 hours");
 	good_expr("120 m", "1 (m/s) * 2 min");
+	good_expr("120 m", "(2 min) * (1 m/s)");
 }
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