diff --git a/tests/qemu-iotests/277 b/tests/qemu-iotests/277
index d34f87021f..a39ce2d873 100755
--- a/tests/qemu-iotests/277
+++ b/tests/qemu-iotests/277
@@ -42,7 +42,7 @@ def make_conf_file(event):
 def start_server_NBD(event):
     make_conf_file(event)
 
-    srv = subprocess.Popen(['nbd-fault-injector.py', '--classic-negotiation',
+    srv = subprocess.Popen(['./nbd-fault-injector.py', '--classic-negotiation',
                            nbd_sock, conf_file], stdout=subprocess.PIPE,
                            stderr=subprocess.STDOUT, universal_newlines=True)
     line = srv.stdout.readline()