diff --git a/tests/test_managers.py b/tests/test_managers.py
index 37728b6..e435e1b 100644
--- a/tests/test_managers.py
+++ b/tests/test_managers.py
@@ -127,3 +127,3 @@ class ResourceManagerTestCase(BaseRedmineTestCase):
             issue = self.redmine.issue.create(project_id=1, subject='Foo', uploads=[{'path': stream}])
-            self.assertEquals(len(w), 1)
+            self.assertEqual(len(w), 1)
             self.assertIs(w[0].category, exceptions.PerformanceWarning)
@@ -168,3 +168,3 @@ class ResourceManagerTestCase(BaseRedmineTestCase):
             self.assertEqual(self.redmine.issue.update(1, subject='Bar', uploads=[{'path': stream}]), True)
-            self.assertEquals(len(w), 1)
+            self.assertEqual(len(w), 1)
             self.assertIs(w[0].category, exceptions.PerformanceWarning)
diff --git a/tests/test_redmine.py b/tests/test_redmine.py
index 22d9600..f39098c 100644
--- a/tests/test_redmine.py
+++ b/tests/test_redmine.py
@@ -79,3 +79,3 @@ class RedmineTestCase(BaseRedmineTestCase):
             self.assertEqual(self.redmine.upload(StringIO(b'\xcf\x86oo'.decode('utf-8')))['token'], '456789')
-            self.assertEquals(len(w), 1)
+            self.assertEqual(len(w), 1)
             self.assertIs(w[0].category, exceptions.PerformanceWarning)