diff --git a/tests/hilti/types/interval/ops.hlt b/tests/hilti/types/interval/ops.hlt
index fab5b0a25..a92da8704 100644
--- a/tests/hilti/types/interval/ops.hlt
+++ b/tests/hilti/types/interval/ops.hlt
@@ -30,7 +30,7 @@ assert i1 >= i1;
 assert i2 <= i2;
 
 assert cast<interval>(5) == interval(5.0);
-assert cast<interval>(5.0) == interval(5.0);
+assert cast<interval>(5.5) == interval(5.5);
 
 assert i3 == interval(25.0);
 assert i3 == i4;