diff --git a/test-cases/RMLSTC0004a/README.md b/test-cases/RMLSTC0004a/README.md
index 21f0a61..8e09ed7 100644
--- a/test-cases/RMLSTC0004a/README.md
+++ b/test-cases/RMLSTC0004a/README.md
@@ -68,6 +68,8 @@ id,name,age
 <http://example.org/3> <http://xmlns.com/foaf/0.1/name> "Chandler Bing" .
 <http://example.org/4> <http://xmlns.com/foaf/0.1/age> "37" .
 <http://example.org/4> <http://xmlns.com/foaf/0.1/name> "Ross Geller" .
+<http://example.org/5> <http://xmlns.com/foaf/0.1/age> "" .
+<http://example.org/5> <http://xmlns.com/foaf/0.1/name> "" .
 
 ```
 
diff --git a/test-cases/RMLSTC0004a/default.nq b/test-cases/RMLSTC0004a/default.nq
index d945676..93cbe17 100644
--- a/test-cases/RMLSTC0004a/default.nq
+++ b/test-cases/RMLSTC0004a/default.nq
@@ -8,3 +8,5 @@
 <http://example.org/3> <http://xmlns.com/foaf/0.1/name> "Chandler Bing" .
 <http://example.org/4> <http://xmlns.com/foaf/0.1/age> "37" .
 <http://example.org/4> <http://xmlns.com/foaf/0.1/name> "Ross Geller" .
+<http://example.org/5> <http://xmlns.com/foaf/0.1/age> "" .
+<http://example.org/5> <http://xmlns.com/foaf/0.1/name> "" .