diff --git a/packages/core/src/tool/plugin/patch.ts b/packages/core/src/tool/plugin/patch.ts
index a9b2e47dcc3..c3a5f5f3696 100644
--- a/packages/core/src/tool/plugin/patch.ts
+++ b/packages/core/src/tool/plugin/patch.ts
@@ -132,7 +132,7 @@ export const Plugin = {
                   const target = yield* resolveTarget(hunk.path)
                   if (prepared.some((change) => change.target.absolute === target.absolute)) {
                     return yield* new ToolFailure({
-                      message: `apply_patch verification failed: invalid patch: multiple operations target ${target.absolute}`,
+                      message: `patch verification failed: invalid patch: multiple operations target ${target.absolute}`,
                     })
                   }
                   if (hunk.type === "add") {
diff --git a/packages/core/test/tool-patch.test.ts b/packages/core/test/tool-patch.test.ts
index 45bfad41c86..b7a74111936 100644
--- a/packages/core/test/tool-patch.test.ts
+++ b/packages/core/test/tool-patch.test.ts
@@ -347,7 +347,7 @@ describe("PatchTool", () => {
                 status: "error",
                 error: {
                   type: "tool.execution",
-                  message: `apply_patch verification failed: invalid patch: multiple operations target ${target}`,
+                  message: `patch verification failed: invalid patch: multiple operations target ${target}`,
                 },
               })
               expect(yield* Effect.promise(() => fs.readFile(target, "utf8"))).toBe("before\n")