diff --git a/packages/ai/test/anthropic-eager-tool-input-compat.test.ts b/packages/ai/test/anthropic-eager-tool-input-compat.test.ts
index c6df9c3e..0560563a 100644
--- a/packages/ai/test/anthropic-eager-tool-input-compat.test.ts
+++ b/packages/ai/test/anthropic-eager-tool-input-compat.test.ts
@@ -22,7 +22,7 @@ function createModel(baseUrl: string, compat?: Model<"anthropic-messages">["comp
 		cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
 		contextWindow: 200000,
 		maxTokens: 32000,
-		compat,
+		compat: { forceAdaptiveThinking: true, ...compat },
 	};
 }