diff --git a/python/ee/ee_types.py b/python/ee/ee_types.py
index 6d9848ea3..ea47cf58c 100644
--- a/python/ee/ee_types.py
+++ b/python/ee/ee_types.py
@@ -77,7 +77,7 @@ def isSubtype(firstType: str, secondType: str) -> bool:
                           'Collection', 'ImageCollection', 'FeatureCollection')
   elif firstType in ('FeatureCollection', 'Collection'):
     return secondType in ('Collection', 'ImageCollection', 'FeatureCollection')
-  elif firstType == object:
+  elif firstType == 'Object':
     return True
   else:
     return False
diff --git a/python/ee/tests/ee_types_test.py b/python/ee/tests/ee_types_test.py
index 3fe6b8e60..28d40670e 100644
--- a/python/ee/tests/ee_types_test.py
+++ b/python/ee/tests/ee_types_test.py
@@ -4,12 +4,13 @@
 import datetime
 
 import unittest
+from ee import apitestcase
 from ee import ee_list
 from ee import ee_number
 from ee import ee_types
 
 
-class EeTypesTest(unittest.TestCase):
+class EeTypesTest(apitestcase.ApiTestCase):
 
   def test_class_to_name(self):
     self.assertEqual('List', ee_types.classToName(ee_list.List))
@@ -27,6 +28,22 @@ class Foo:
 
     self.assertEqual('Object', ee_types.classToName(Foo))
 
+  def test_is_subtype(self):
+    self.assertTrue(ee_types.isSubtype('Image', 'Image'))
+    self.assertTrue(ee_types.isSubtype('Element', 'Image'))
+    self.assertTrue(ee_types.isSubtype('Collection', 'ImageCollection'))
+    self.assertTrue(ee_types.isSubtype('FeatureCollection', 'ImageCollection'))
+    self.assertTrue(ee_types.isSubtype('Object', 'Image'))
+    self.assertFalse(ee_types.isSubtype('Image', 'Element'))
+
+  def test_is_array(self):
+    self.assertTrue(ee_types.isArray([]))
+    self.assertTrue(ee_types.isArray(()))
+    self.assertTrue(ee_types.isArray(ee_list.List([1, 2])))
+    self.assertFalse(ee_types.isArray(1))
+    self.assertFalse(ee_types.isArray('string'))
+    self.assertFalse(ee_types.isArray(ee_number.Number(1)))
+
 
 if __name__ == '__main__':
   unittest.main()