diff --git a/tests/test_drug_central.py b/tests/test_drug_central.py
index 4536274d..5dc1079b 100644
--- a/tests/test_drug_central.py
+++ b/tests/test_drug_central.py
@@ -84,7 +84,8 @@ def test_edges_file(self):
         edge_file = os.path.join(self.dc_output_dir, "edges.tsv")
         self.assertTrue(os.path.isfile(edge_file))
         edge_df = pd.read_csv(edge_file, sep="\t", header=0)
-        self.assertEqual((21, 6), edge_df.shape)
-        self.assertEqual(['subject', 'edge_label', 'object', 'relation', 'provided_by',
-                          'comment'],
-                         list(edge_df.columns))
+        self.assertEqual((21, 7), edge_df.shape)
+        self.assertEqual(
+            ['subject', 'edge_label', 'object', 'relation', 'provided_by', 'comment', 'type'],
+             list(edge_df.columns)
+        )
diff --git a/tests/test_intact.py b/tests/test_intact.py
index 5be26848..ee121531 100644
--- a/tests/test_intact.py
+++ b/tests/test_intact.py
@@ -15,7 +15,7 @@ def test_intact_instance(self):
         self.assertEqual(self.intact.node_header,
                          ['id', 'name', 'category', 'ncbi_taxid', 'provided_by'])
         self.assertEqual(self.intact.edge_header,
-                        ['subject', 'edge_label', 'object', 'relation', 'provided_by',
+                        ['subject', 'edge_label', 'object', 'relation', 'provided_by', 'type',
                          'publication', 'num_participants', 'association_type',
                          'detection_method', 'subj_exp_role', 'obj_exp_role'])
 
@@ -35,7 +35,7 @@ def test_struct_parse_xml_to_nodes_edges(self):
                     ['UniProtKB:P0C6X7-PRO_0000037317', 'nsp10_cvhsa', 'biolink:RNA',
                      '694009', 'intact']],
           'edges': [['UniProtKB:P20290', 'biolink:interacts_with',
-                     'UniProtKB:P0C6X7-PRO_0000037317', 'RO:0002437', 'intact',
+                     'UniProtKB:P0C6X7-PRO_0000037317', 'RO:0002437', 'intact', 'biolink:Association',
                      'PMID:16157265', '2', 'physical association', '2 hybrid', 'prey',
                      'bait']]
          }),
@@ -47,6 +47,7 @@ def test_struct_parse_xml_to_nodes_edges(self):
                 'UniProtKB:P41811',
                 'RO:0002437',
                 'intact',
+                'biolink:Association',
                 'PMID:23481256',
                 '3',
                 'physical association',
diff --git a/tests/test_sars_cov_2_gene_annot.py b/tests/test_sars_cov_2_gene_annot.py
index 665d7f8e..60c9ef80 100644
--- a/tests/test_sars_cov_2_gene_annot.py
+++ b/tests/test_sars_cov_2_gene_annot.py
@@ -61,7 +61,7 @@ def test_gpa_to_edge_data(self):
         self.assertEqual(len(self.sc2ga.edge_header), len(edge1))
         self.assertEqual(edge1,
                          ['UniProtKB:P0DTC1', 'biolink:enables', 'GO:0003723',
-                          'RO:0002327', 'sars_cov_2_gene_annot',
+                          'RO:0002327', 'sars_cov_2_gene_annot', 'biolink:Association',
                           'GO_REF:0000043', 'ECO:0000322', 'UniProtKB-KW:KW-0694', '',
                           '20200321', 'UniProt', '', 'go_evidence=IEA'])
 
diff --git a/tests/test_string.py b/tests/test_string.py
index 0c8fabf2..9476784e 100644
--- a/tests/test_string.py
+++ b/tests/test_string.py
@@ -75,8 +75,8 @@ def test_edges_file(self):
         edge_file = os.path.join(self.string_output_dir, "edges.tsv")
         self.assertTrue(os.path.isfile(edge_file))
         edge_df = pd.read_csv(edge_file, sep="\t", header=0)
-        self.assertEqual((9, 19), edge_df.shape)
-        self.assertEqual(['subject', 'edge_label', 'object', 'relation', 'provided_by',
+        self.assertEqual((9, 20), edge_df.shape)
+        self.assertEqual(['subject', 'edge_label', 'object', 'relation', 'provided_by', 'type',
                           'combined_score', 'neighborhood', 'neighborhood_transferred',
                           'fusion', 'cooccurence', 'homology', 'coexpression',
                           'coexpression_transferred', 'experiments',