diff --git a/test/functional/config/example_dut_config.yml b/test/functional/config/example_dut_config.yml
index d139b34..b595c9b 100644
--- a/test/functional/config/example_dut_config.yml
+++ b/test/functional/config/example_dut_config.yml
@@ -11,11 +11,11 @@ type: "local"
 working_dir: "/tmp/open-cas-linux/"
 
 disks:
-  - path: '/dev/device_name1' # disk device path
-    serial: 'ABC'             # disk serial number
-    type: 'nand'              # disk type
+  - path: "/dev/device_name1" # disk device path
+    serial: "ABC"             # disk serial number
+    type: "nand"              # disk type
     blocksize: 512            # 512B
-  - path: '/dev/device_name2'
-    serial: 'DEF'
-    type: 'hdd'
+  - path: "/dev/device_name2"
+    serial: "DEF"
+    type: "hdd"
     blocksize: 512