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diff --git a/plip/test/test_remote_services.py b/plip/test/test_remote_services.py
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+# coding=utf-8
+"""
+Protein-Ligand Interaction Profiler - Analyze and visualize protein-ligand interactions in PDB files.
+test_remote_services.py - Unit Tests for remote services.
+"""
+
+
+import unittest
+from plip.exchange.webservices import check_pdb_status
+
+
+class TestPDB(unittest.TestCase):
+    """Test PDB Web Service methods"""
+
+    def test_pdb_entry_status(self):
+        # 1a0v is an obsolete entry and is replaced by 1y46
+        status, current_pdbid = check_pdb_status('1a0v')
+        self.assertEqual(status, 'OBSOLETE')
+        self.assertEqual(current_pdbid, '1y46')
+
+        # 1vsn is an current entry
+        status, current_pdbid = check_pdb_status('1vsn')
+        self.assertEqual(status, 'CURRENT')
+        self.assertEqual(current_pdbid, '1vsn')
+
+        # xxxx is not an PDB entry
+        status, current_pdbid = check_pdb_status('xxxx')
+        self.assertEqual(status, 'UNKNOWN')
+        self.assertEqual(current_pdbid, 'xxxx')