diff --git a/test-cases/RMLTC0018a-PostgreSQL/output.nq b/test-cases/RMLTC0018a-PostgreSQL/output.nq
deleted file mode 100644
index ae8816d4..00000000
--- a/test-cases/RMLTC0018a-PostgreSQL/output.nq
+++ /dev/null
@@ -1,9 +0,0 @@
-<http://example.com/10> <http://xmlns.com/foaf/0.1/name> "Venus          " .
-<http://example.com/10> <http://example.com/id> "10"^^<http://www.w3.org/2001/XMLSchema#integer> .
-<http://example.com/10> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> .
-<http://example.com/20> <http://xmlns.com/foaf/0.1/name> "Fernando       " .
-<http://example.com/20> <http://example.com/id> "20"^^<http://www.w3.org/2001/XMLSchema#integer> .
-<http://example.com/20> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> .
-<http://example.com/30> <http://xmlns.com/foaf/0.1/name> "David          " .
-<http://example.com/30> <http://example.com/id> "30"^^<http://www.w3.org/2001/XMLSchema#integer> .
-<http://example.com/30> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> .
diff --git a/test-cases/RMLTC0018a-PostgreSQL/resource.sql b/test-cases/RMLTC0018a-PostgreSQL/resource.sql
deleted file mode 100644
index b2e9f677..00000000
--- a/test-cases/RMLTC0018a-PostgreSQL/resource.sql
+++ /dev/null
@@ -1,9 +0,0 @@
-DROP TABLE IF EXISTS Student CASCADE;
-
-CREATE TABLE Student (
-ID INTEGER,
-Name CHAR(15)
-);
-INSERT INTO Student (ID,Name) VALUES (10,'Venus');
-INSERT INTO Student (ID,Name) VALUES (20,'Fernando');
-INSERT INTO Student (ID,Name) VALUES (30,'David');
diff --git a/test-cases/RMLTC0018a-SQLServer/output.nq b/test-cases/RMLTC0018a-SQLServer/output.nq
deleted file mode 100644
index ae8816d4..00000000
--- a/test-cases/RMLTC0018a-SQLServer/output.nq
+++ /dev/null
@@ -1,9 +0,0 @@
-<http://example.com/10> <http://xmlns.com/foaf/0.1/name> "Venus          " .
-<http://example.com/10> <http://example.com/id> "10"^^<http://www.w3.org/2001/XMLSchema#integer> .
-<http://example.com/10> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> .
-<http://example.com/20> <http://xmlns.com/foaf/0.1/name> "Fernando       " .
-<http://example.com/20> <http://example.com/id> "20"^^<http://www.w3.org/2001/XMLSchema#integer> .
-<http://example.com/20> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> .
-<http://example.com/30> <http://xmlns.com/foaf/0.1/name> "David          " .
-<http://example.com/30> <http://example.com/id> "30"^^<http://www.w3.org/2001/XMLSchema#integer> .
-<http://example.com/30> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> .
diff --git a/test-cases/RMLTC0018a-SQLServer/resource.sql b/test-cases/RMLTC0018a-SQLServer/resource.sql
deleted file mode 100644
index 971a3ad4..00000000
--- a/test-cases/RMLTC0018a-SQLServer/resource.sql
+++ /dev/null
@@ -1,10 +0,0 @@
-USE TestDB;
-DROP TABLE IF EXISTS Student;
-
-CREATE TABLE Student (
-ID INTEGER,
-Name CHAR(15)
-);
-INSERT INTO Student (ID,Name) VALUES (10,'Venus');
-INSERT INTO Student (ID,Name) VALUES (20,'Fernando');
-INSERT INTO Student (ID,Name) VALUES (30,'David');