diff --git a/tests/test_trezor.config.py b/tests/test_trezor.config.py
index eaecda838..416ec3059 100644
--- a/tests/test_trezor.config.py
+++ b/tests/test_trezor.config.py
@@ -11,7 +11,7 @@ PINKEY = 0x00
 
 def random_entry():
     while True:
-        appid, key = 1 + random.uniform(127), random.uniform(256)
+        appid, key = 1 + random.uniform(63), random.uniform(256)
         if appid != PINAPP or key != PINKEY:
             break
     return appid, key