diff --git a/tests/test_config.py b/tests/test_config.py
index c1f763b41..ad33707d3 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -31,6 +31,7 @@ def test_wsgi_app():
 
     assert isinstance(config.loaded_app, WSGIMiddleware)
     assert config.interface == "wsgi"
+    assert config.asgi_version == "3.0"
 
 
 def test_proxy_headers():
diff --git a/uvicorn/config.py b/uvicorn/config.py
index fa17cae03..80d9704e3 100644
--- a/uvicorn/config.py
+++ b/uvicorn/config.py
@@ -202,7 +202,7 @@ def __init__(
 
     @property
     def asgi_version(self) -> str:
-        return {"asgi2": "2.0", "asgi3": "3.0"}[self.interface]
+        return {"asgi2": "2.0", "asgi3": "3.0", "wsgi": "3.0"}[self.interface]
 
     @property
     def is_ssl(self) -> bool: