diff --git a/tests/basic.py b/tests/basic.py
index 7ddfdcd..c4d8036 100644
--- a/tests/basic.py
+++ b/tests/basic.py
@@ -72,7 +72,12 @@
     def setUp(self):
         self.logger = basic_logger
         self.config = basic_config
-        signal.signal(signal.SIGINT, self.sig_handler)
+        #@todo Test cases shouldn't monkey with signals; move SIGINT handler
+        # to top-level oft
+        try:
+           signal.signal(signal.SIGINT, self.sig_handler)
+        except ValueError, e:
+           basic_logger.info("Could not set SIGINT handler: %s" % e)
         basic_logger.info("** START TEST CASE " + str(self))
         self.controller = controller.Controller(
             host=basic_config["controller_host"],
@@ -178,7 +183,12 @@
         self.clean_shutdown = True
         self.logger = basic_logger
         self.config = basic_config
-        signal.signal(signal.SIGINT, self.sig_handler)
+        #@todo Test cases shouldn't monkey with signals; move SIGINT handler
+        # to top-level oft
+        try:
+           signal.signal(signal.SIGINT, self.sig_handler)
+        except ValueError, e:
+           basic_logger.info("Could not set SIGINT handler: %s" % e)
         basic_logger.info("** START DataPlaneOnly CASE " + str(self))
         self.dataplane = dataplane.DataPlane(self.config)
         for of_port, ifname in basic_port_map.items():
diff --git a/tests/serial_failover.py b/tests/serial_failover.py
index 600c50b..90a4236 100644
--- a/tests/serial_failover.py
+++ b/tests/serial_failover.py
@@ -141,7 +141,12 @@
     def setUp(self):
         self.logger = serial_failover_logger
         self.config = serial_failover_config
-        signal.signal(signal.SIGINT, self.sig_handler)
+        #@todo Test cases shouldn't monkey with signals; move SIGINT handler
+        # to top-level oft
+        try:
+           signal.signal(signal.SIGINT, self.sig_handler)
+        except ValueError, e:
+           serial_failover_logger.info("Could not set SIGINT handler: %s" % e)
         serial_failover_logger.info("** START TEST CASE " + str(self))
 
         self.test_timeout = test_param_get(serial_failover_config,