diff --git a/source/tanya/typecons.d b/source/tanya/typecons.d
index 66ee8c9..68cc589 100644
--- a/source/tanya/typecons.d
+++ b/source/tanya/typecons.d
@@ -92,7 +92,7 @@ template Pair(Specs...)
 }
 
 ///
-unittest
+@nogc nothrow pure @safe unittest
 {
     static assert(is(Pair!(int, int)));
     static assert(!is(Pair!(int, 5)));