From 1baf141146fdc46262460d8ca8617f1e46d29969 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Mon, 19 Jan 2026 17:13:43 +1100
Subject: [PATCH] Check that _EXTENSION_PLUGIN contains all registered
 extensions

---
 Tests/test_image.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Tests/test_image.py b/Tests/test_image.py
index afc6e8e16..c064939e8 100644
--- a/Tests/test_image.py
+++ b/Tests/test_image.py
@@ -466,6 +466,9 @@ class TestImage:
         # Assert
         assert Image._initialized == 2
 
+        for extension in Image.EXTENSION:
+            assert extension in Image._EXTENSION_PLUGIN
+
     def test_registered_extensions(self) -> None:
         # Arrange
         # Open an image to trigger plugin registration