diff --git a/README.md b/README.md
index 164222f..9fbe70f 100644
--- a/README.md
+++ b/README.md
@@ -100,6 +100,12 @@ This daemon expects the library to be already configured to find the PN532 devic
 If you installed libnfc from source, the default directory might be
 `/usr/local/etc/nfc` instead of `/etc/nfc`.
 
+## Conflicts with other running software - pcscd, pn533 kernel modules
+
+If you have `pcscd` running, it will take over the reader and you can't use it. Kill/stop pcscd service/process if running.
+
+Similarly, you have to blacklist `pn533` and `pn533_usb` kernel modules (usually in a file like `/etc/modprobe.d/blacklist.conf`).
+
 ## Known bugs (TODO)
 
 * The open-switch module that changes topic based on status of GPIO switch can set status, 
diff --git a/test_nfc.py b/test_nfc.py
index 65d51fa..a6e9cff 100755
--- a/test_nfc.py
+++ b/test_nfc.py
@@ -42,12 +42,12 @@ tests = {
 }
 
 # default test if not selected otherwise in sys.argv[1]
-apdu_test = "ndef4"
+apdu_test = "desfire-ndef4"
 
 if len(sys.argv) > 1:
     apdu_test = sys.argv[1]
 
-print "Available tests: %s" % ", ".join(sorted(tests.keys()))
+print "Available tests: %s" % ", ".join(sorted(tests.keys() + "desfire-ndef4")) #desfire-ndef4 has a bit postprocessing
 print "Selected test: %s" % apdu_test
 
 # select apdus according to test name