diff --git a/test/test_hyper_SSLContext.py b/test/test_hyper_SSLContext.py
index 5399ccbc..67996c9a 100644
--- a/test/test_hyper_SSLContext.py
+++ b/test/test_hyper_SSLContext.py
@@ -39,5 +39,5 @@ def test_custom_context_with_cert_as_file(self):
         context.load_cert_chain(
             certfile=CLIENT_CERT_FILE,
             keyfile=CLIENT_KEY_FILE,
-            password='abc123'
+            password=b'abc123'
         )