diff --git a/loop/server/loophttp_test.go b/loop/server/loophttp_test.go
index cd97b12..c6d4b6b 100644
--- a/loop/server/loophttp_test.go
+++ b/loop/server/loophttp_test.go
@@ -36,6 +36,11 @@
 	skabandAddr              string
 }
 
+// TokenContextWindow implements loop.CodingAgent.
+func (m *mockAgent) TokenContextWindow() int {
+	return 200000
+}
+
 func (m *mockAgent) NewIterator(ctx context.Context, nextMessageIdx int) loop.MessageIterator {
 	m.mu.RLock()
 	// Send existing messages that should be available immediately