From d05e8cfd827d3019c575f272d866fa4f45c650a9 Mon Sep 17 00:00:00 2001
From: Hadrien Mary <hadim@users.noreply.github.com>
Date: Thu, 9 Oct 2025 06:43:18 -0400
Subject: [PATCH] Change protocol check to fallback for known implementations

---
 upath/_flavour.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/upath/_flavour.py b/upath/_flavour.py
index 19eb62a3..d1460730 100644
--- a/upath/_flavour.py
+++ b/upath/_flavour.py
@@ -198,7 +198,7 @@ def from_protocol(
         except KeyError:
             pass
         # finally fallback to a default flavour for the protocol
-        if protocol in known_implementations:
+        if protocol not in known_implementations:
             warnings.warn(
                 f"Could not find default for known protocol {protocol!r}."
                 " Creating a default flavour for it. Please report this"