diff --git a/bin/swift-bench b/bin/swift-bench
index edeb5111c1..cd4f7c349a 100755
--- a/bin/swift-bench
+++ b/bin/swift-bench
@@ -23,7 +23,7 @@ from optparse import OptionParser
 
 from swift.common.bench import (BenchController, DistributedBenchController,
 create_containers, delete_containers)
-from swift.common.utils import readconf, LogAdapter
+from swift.common.utils import readconf, LogAdapter, TRUE_VALUES
 
 # The defaults should be sufficient to run swift-bench on a SAIO
 CONF_DEFAULTS = {
@@ -137,6 +137,11 @@ if __name__ == '__main__':
 options.del_concurrency = options.concurrency
 options.containers = ['%s_%d' % (options.container_name, i)
 for i in xrange(int(options.num_containers))]
+ # check boolean options vs config parameter values
+ if str(options.delete).lower() in TRUE_VALUES:
+ options.delete = 'yes'
+ else:
+ options.delete = 'no'
 
 def sigterm(signum, frame):
 sys.exit('Termination signal received.')
@@ -165,5 +170,5 @@ if __name__ == '__main__':
 controller = controller_class(logger, options)
 controller.run()
 
- if options.delete:
+ if options.delete.lower() in TRUE_VALUES:
 delete_containers(logger, options)
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