diff --git a/test/models/test_class.rb b/test/models/test_class.rb
index e5abe44..2a38c15 100644
--- a/test/models/test_class.rb
+++ b/test/models/test_class.rb
@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+
+require 'faraday/follow_redirects'
 require_relative '../test_case'
 
 class ClassTest < LinkedData::Client::TestCase
@@ -13,4 +16,58 @@ def test_find
     assert_equal ontology, cls.links['ontology']
     assert_true cls.hasChildren
   end
+
+  # Test PURL generation for a class in an OWL format ontology
+  def test_purl_owl
+    cls = LinkedData::Client::Models::Class.find(
+      'http://bioontology.org/ontologies/Activity.owl#Activity',
+      'https://data.bioontology.org/ontologies/BRO'
+    )
+    refute_nil cls
+
+    res = fetch_response(cls.purl)
+    assert_equal 200, res.status
+    assert_equal 'https://bioportal.bioontology.org/ontologies/BRO'\
+                 '?p=classes&conceptid=http%3A%2F%2Fbioontology.org%2Fontologies%2FActivity.owl%23Activity',
+                 res.env[:url].to_s
+  end
+
+  # Test PURL generation for a class in a UMLS format ontology
+  def test_purl_umls
+    cls = LinkedData::Client::Models::Class.find(
+      'http://purl.bioontology.org/ontology/SNOMEDCT/64572001',
+      'https://bioportal.bioontology.org/ontologies/SNOMEDCT'
+    )
+    refute_nil cls
+
+    res = fetch_response(cls.purl)
+    assert_equal 200, res.status
+    assert_equal 'https://bioportal.bioontology.org/ontologies/SNOMEDCT?p=classes&conceptid=64572001',
+                 res.env[:url].to_s
+  end
+
+  # Test PURL generation for a class in an OBO format ontology
+  def test_purl_obo
+    cls = LinkedData::Client::Models::Class.find(
+      'http://purl.obolibrary.org/obo/DOID_4',
+      'https://bioportal.bioontology.org/ontologies/DOID'
+    )
+    refute_nil cls
+
+    res = fetch_response(cls.purl)
+    assert_equal 200, res.status
+    assert_equal 'https://bioportal.bioontology.org/ontologies/DOID'\
+                 '?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FDOID_4',
+                 res.env[:url].to_s
+  end
+
+  private
+
+  def fetch_response(url)
+    conn = Faraday.new do |f|
+      f.response :follow_redirects
+      f.adapter Faraday.default_adapter
+    end
+    conn.get(url)
+  end
 end