--- a/tools/rostest/src/rostest/rostestutil.py
+++ b/tools/rostest/src/rostest/rostestutil.py
@@ -43,6 +43,18 @@
 import os
 import sys
 import logging
+import unittest
+
+class LegacyTestCase(unittest.TestCase):
+    """Class for patching deprecated TestCase method aliases"""
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+    assert_ = unittest.TestCase.assertTrue
+    assertEquals = unittest.TestCase.assertEqual
+    failIf = unittest.TestCase.assertFalse
+
 
 def printlog(msg, *args):
     if args:
--- a/tools/rostest/src/rostest/__init__.py
+++ b/tools/rostest/src/rostest/__init__.py
@@ -44,6 +44,7 @@
 import rosunit
 
 import rosgraph
+import rostestutil
 
 try:
     from importlib import reload
--- a/tools/rostest/nodes/hztest
+++ b/tools/rostest/nodes/hztest
@@ -56,7 +56,7 @@
 
 from threading import Thread
 
-class HzTest(unittest.TestCase):
+class HzTest(rostest.rostestutil.LegacyTestCase):
     def __init__(self, *args):
         super(HzTest, self).__init__(*args)
         rospy.init_node(NAME)
--- a/tools/rosnode/test/check_rosnode_command_online.py
+++ b/tools/rosnode/test/check_rosnode_command_online.py
@@ -50,7 +50,7 @@
         time.sleep(0.1)
     os.kill(popen.pid, signal.SIGKILL)
     
-class TestRosnodeOnline(unittest.TestCase):
+class TestRosnodeOnline(rostest.rostestutil.LegacyTestCase):
 
     def setUp(self):
         self.vals = set()
--- a/tools/rostest/test/test_clean_master.py
+++ b/tools/rostest/test/test_clean_master.py
@@ -37,8 +37,9 @@
 
 import rospy
 import rosunit
+import rostest
 
-class CleanMasterTest(unittest.TestCase):
+class CleanMasterTest(rostest.rostestutil.LegacyTestCase):
   
     def test_clean_master(self):
         self.failIf(rospy.has_param('dirty'))
--- a/tools/rostest/test/test_distro_version.py
+++ b/tools/rostest/test/test_distro_version.py
@@ -39,7 +39,7 @@
 import rostest
 import subprocess
 
-class VersionTest(unittest.TestCase):
+class VersionTest(rostest.rostestutil.LegacyTestCase):
   
     def test_distro_version(self):
         val = (subprocess.Popen(['rosversion', '-d'], stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()[0] or b'').decode().strip()
--- a/tools/rostest/nodes/paramtest
+++ b/tools/rostest/nodes/paramtest
@@ -53,7 +53,7 @@
 CLASSNAME = 'paramtest'
 
 
-class ParamTest(unittest.TestCase):
+class ParamTest(rostest.rostestutil.LegacyTestCase):
     def __init__(self, *args):
         super(ParamTest, self).__init__(*args)
         rospy.init_node(CLASSNAME)
--- a/tools/rostest/src/rostest/runner.py
+++ b/tools/rostest/src/rostest/runner.py
@@ -110,7 +110,7 @@
     def fn(self):
         done = False
         while not done:
-            self.assert_(self.test_parent is not None, "ROSTestParent initialization failed")
+            self.assertTrue(self.test_parent is not None, "ROSTestParent initialization failed")
 
             test_name = test.test_name
 
@@ -118,7 +118,7 @@
 
             #launch the other nodes
             succeeded, failed = self.test_parent.launch()
-            self.assert_(not failed, "Test Fixture Nodes %s failed to launch"%failed)
+            self.assertTrue(not failed, "Test Fixture Nodes %s failed to launch"%failed)
 
             #setup the test
             # - we pass in the output test_file name so we can scrape it
@@ -161,7 +161,7 @@
             if not _textMode or timeout_failure:
                 
                 if not timeout_failure:
-                    self.assert_(os.path.isfile(test_file), "test [%s] did not generate test results"%test_name)
+                    self.assertTrue(os.path.isfile(test_file), "test [%s] did not generate test results"%test_name)
                     printlog("test [%s] results are in [%s]", test_name, test_file)
                     results = rosunit.junitxml.read(test_file, test_name)
                     test_fail = results.num_errors or results.num_failures