diff --git a/src/agents/pi-embedded-runner.sanitize-session-history.test.ts b/src/agents/pi-embedded-runner.sanitize-session-history.test.ts
index e9cd5065d3d..6e401b92e0a 100644
--- a/src/agents/pi-embedded-runner.sanitize-session-history.test.ts
+++ b/src/agents/pi-embedded-runner.sanitize-session-history.test.ts
@@ -298,7 +298,7 @@ describe("sanitizeSessionHistory", () => {
     expect(result[1]?.role).toBe("assistant");
   });
 
-  it("does not synthesize tool results for openai-responses", async () => {
+  it("synthesizes missing tool results for openai-responses after repair", async () => {
     const messages = [
       {
         role: "assistant",
@@ -314,8 +314,11 @@ describe("sanitizeSessionHistory", () => {
       sessionId: TEST_SESSION_ID,
     });
 
-    expect(result).toHaveLength(1);
+    // repairToolUseResultPairing now runs for all providers (including OpenAI)
+    // to fix orphaned function_call_output items that OpenAI would reject.
+    expect(result).toHaveLength(2);
     expect(result[0]?.role).toBe("assistant");
+    expect(result[1]?.role).toBe("toolResult");
   });
 
   it("drops malformed tool calls missing input or arguments", async () => {