diff --git a/source/vibe/internal/hashmap.d b/source/vibe/internal/hashmap.d
index 4a09df8..d803eb6 100644
--- a/source/vibe/internal/hashmap.d
+++ b/source/vibe/internal/hashmap.d
@@ -250,7 +250,7 @@ struct HashMap(TKey, TValue, Traits = DefaultHashMapTraits!TKey)
 	}
 }
 
-unittest {
+nothrow unittest {
 	import std.conv;
 
 	HashMap!(string, string) map;