diff --git a/tests/output/sha512.trig b/tests/output/sha512.trig
index 53e2503..ed1e967 100644
--- a/tests/output/sha512.trig
+++ b/tests/output/sha512.trig
@@ -1,9 +1,9 @@
+@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
 @prefix : <https://eyereasoner.github.io/lingua/tests/sha512.trig#>.
 @prefix lingua: <http://www.w3.org/2000/10/swap/lingua#>.
-@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
 @prefix crypto: <http://www.w3.org/2000/10/swap/crypto#>.
 
-() :sha512 ("hello world" "309ecc489c12d6eb4cc40f50c902f2b4d0ed77ee511a7c7a9bcd3ca86d4cd86f989dd35bc5ff499670da34255b45b0cfd830e81f605dcf7dc5542e93ae9cd76f").
+[] rdf:value "hello world"; :sha512 "309ecc489c12d6eb4cc40f50c902f2b4d0ed77ee511a7c7a9bcd3ca86d4cd86f989dd35bc5ff499670da34255b45b0cfd830e81f605dcf7dc5542e93ae9cd76f".
 
 #
 # lingua explanation
@@ -16,5 +16,5 @@ _:gn_1 {
 }
 
 _:gn_2 {
-    () :sha512 ("hello world" "309ecc489c12d6eb4cc40f50c902f2b4d0ed77ee511a7c7a9bcd3ca86d4cd86f989dd35bc5ff499670da34255b45b0cfd830e81f605dcf7dc5542e93ae9cd76f").
+    [] rdf:value "hello world"; :sha512 "309ecc489c12d6eb4cc40f50c902f2b4d0ed77ee511a7c7a9bcd3ca86d4cd86f989dd35bc5ff499670da34255b45b0cfd830e81f605dcf7dc5542e93ae9cd76f".
 }
diff --git a/tests/sha512.trig b/tests/sha512.trig
index 868846c..e0d51b1 100644
--- a/tests/sha512.trig
+++ b/tests/sha512.trig
@@ -18,5 +18,5 @@ _:ng1 {
 }
 
 _:ng2 {
-    () :sha512 (var:X var:Y).
+    var:X :sha512 var:Y.
 }