diff --git a/tests/mock-forgejo.py b/tests/mock-forgejo.py
index afc21fe..c69b6ae 100755
--- a/tests/mock-forgejo.py
+++ b/tests/mock-forgejo.py
@@ -702,10 +702,11 @@ def main():
     global SHUTDOWN_REQUESTED
 
     port = int(os.environ.get("MOCK_FORGE_PORT", 3000))
-    # Set SO_REUSEADDR before creating the server to allow port reuse
-    class ReusableHTTPServer(ThreadingHTTPServer):
-        allow_reuse_address = True
-    server = ReusableHTTPServer(("0.0.0.0", port), ForgejoHandler)
+    server = ThreadingHTTPServer(("0.0.0.0", port), ForgejoHandler)
+    try:
+        server.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    except OSError:
+        pass  # Not all platforms support this
 
     print(f"Mock Forgejo server starting on port {port}", file=sys.stderr)