diff --git a/tests/disk/common.py b/tests/disk/common.py
index 0234fb33303ef02dfc7fc8f7f891421623169a35..87e61a15d6d2b22738cafb2d25f89d569fe0835a 100644
--- a/tests/disk/common.py
+++ b/tests/disk/common.py
@@ -39,7 +39,7 @@ def query_disk(logger, command):
     command.run_cmd("cat /proc/mdstat")
 
 
-def get_disk(logger, command, config_data, pci_num):
+def get_disk(logger, command, config_data, pci_num=""):
     """
     Get disk info
     """
diff --git a/tests/disk/disk.py b/tests/disk/disk.py
index 0d17c0ea71abd0c80b9513201530079444b567f4..b0fbc3d8959514a089b057b7ad3b836eb7dc216f 100755
--- a/tests/disk/disk.py
+++ b/tests/disk/disk.py
@@ -42,7 +42,7 @@ class DiskTest(Test):
         """
         Start test
         """
-        self.disks = get_disk(self.logger, self.command, self.config_data, self.pci_num)
+        self.disks = get_disk(self.logger, self.command, self.config_data)
         if len(self.disks) == 0:
             self.logger.error("No suite disk found to test.")
             return False