diff --git a/test/test.py b/test/test.py
index 24e7c4e..f59256a 100755
--- a/test/test.py
+++ b/test/test.py
@@ -52,7 +52,7 @@
 CONFIG_FILE = 'tests.json'
 
 
-def run_cross_tests(server_match, client_match, jobs, skip_known_failures, retry_count, regex):
+def run_cross_tests(server_match, client_match, jobs, skip_known_failures, only_known_failures, retry_count, regex):
     logger = multiprocessing.get_logger()
     logger.debug('Collecting tests')
     with open(path_join(TEST_DIR, CONFIG_FILE), 'r') as fp:
@@ -63,6 +63,10 @@
         print('  servers: %s' % server_match, file=sys.stderr)
         print('  clients: %s' % client_match, file=sys.stderr)
         return False
+    if only_known_failures:
+        logger.debug('Only running known failures')
+        known = crossrunner.load_known_failures(TEST_DIR)
+        tests = list(filter(lambda t: crossrunner.test_name(**t) in known, tests))
     if skip_known_failures:
         logger.debug('Skipping known failures')
         known = crossrunner.load_known_failures(TEST_DIR)
@@ -81,7 +85,7 @@
         return False
 
 
-def run_feature_tests(server_match, feature_match, jobs, skip_known_failures, retry_count, regex):
+def run_feature_tests(server_match, feature_match, jobs, skip_known_failures, only_known_failures, retry_count, regex):
     basedir = path_join(ROOT_DIR, FEATURE_DIR_RELATIVE)
     logger = multiprocessing.get_logger()
     logger.debug('Collecting tests')
@@ -95,6 +99,10 @@
         print('  servers: %s' % server_match, file=sys.stderr)
         print('  features: %s' % feature_match, file=sys.stderr)
         return False
+    if only_known_failures:
+        logger.debug('Only running known failures')
+        known = crossrunner.load_known_failures(basedir)
+        tests = list(filter(lambda t: crossrunner.test_name(**t) in known, tests))
     if skip_known_failures:
         logger.debug('Skipping known failures')
         known = crossrunner.load_known_failures(basedir)
@@ -130,6 +138,8 @@
     parser.add_argument('-F', '--features', nargs='*', default=None,
                         help='run server feature tests instead of cross language tests')
     parser.add_argument('-R', '--regex', help='test name pattern to run')
+    parser.add_argument('-o', '--only-known_failures', action='store_true', dest='only_known_failures',
+                        help='only execute tests that are known to fail')
     parser.add_argument('-s', '--skip-known-failures', action='store_true', dest='skip_known_failures',
                         help='do not execute tests that are known to fail')
     parser.add_argument('-r', '--retry-count', type=int,
@@ -169,10 +179,12 @@
     elif options.features is not None:
         features = options.features or ['.*']
         res = run_feature_tests(server_match, features, options.jobs,
-                                options.skip_known_failures, options.retry_count, options.regex)
+                                options.skip_known_failures, options.only_known_failures,
+                                options.retry_count, options.regex)
     else:
         res = run_cross_tests(server_match, client_match, options.jobs,
-                              options.skip_known_failures, options.retry_count, options.regex)
+                              options.skip_known_failures, options.only_known_failures,
+                              options.retry_count, options.regex)
     return 0 if res else 1