diff --git a/test/asynchronous/test_encryption.py b/test/asynchronous/test_encryption.py
index 86172b4993..57acf5824e 100644
--- a/test/asynchronous/test_encryption.py
+++ b/test/asynchronous/test_encryption.py
@@ -2922,7 +2922,7 @@ async def encrypt_and_cast(i):
                 EncryptionError, "expected matching 'min' and value type. Got range option"
             ):
                 await self.client_encryption.encrypt(
-                    6 if cast_func is int else float(6),
+                    6 if cast_func is not int else float(6),
                     key_id=self.key1_id,
                     algorithm=Algorithm.RANGE,
                     contention_factor=0,