diff --git a/Tests/test_image.py b/Tests/test_image.py
index b4e81e466..69a66b85a 100644
--- a/Tests/test_image.py
+++ b/Tests/test_image.py
@@ -401,8 +401,6 @@ class TestImage:
     def test_registered_extensions_uninitialized(self):
         # Arrange
         Image._initialized = 0
-        extension = Image.EXTENSION
-        Image.EXTENSION = {}
 
         # Act
         Image.registered_extensions()
@@ -410,10 +408,6 @@ class TestImage:
         # Assert
         assert Image._initialized == 2
 
-        # Restore the original state and assert
-        Image.EXTENSION = extension
-        assert Image.EXTENSION
-
     def test_registered_extensions(self):
         # Arrange
         # Open an image to trigger plugin registration
diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index c2216e27a..6288f46ef 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -3418,8 +3418,7 @@ def registered_extensions():
     Returns a dictionary containing all file extensions belonging
     to registered plugins
     """
-    if not EXTENSION:
-        init()
+    init()
     return EXTENSION