diff --git a/src/agents/pi-embedded-runner.e2e.test.ts b/src/agents/pi-embedded-runner.e2e.test.ts
index ca14c213f09..6ce2eb04b9c 100644
--- a/src/agents/pi-embedded-runner.e2e.test.ts
+++ b/src/agents/pi-embedded-runner.e2e.test.ts
@@ -248,10 +248,13 @@ const textFromContent = (content: unknown) => {
 
 const readSessionEntries = async (sessionFile: string) => {
   const raw = await fs.readFile(sessionFile, "utf-8");
-  return raw
-    .split(/\r?\n/)
-    .filter(Boolean)
-    .map((line) => JSON.parse(line) as { type?: string; customType?: string; data?: unknown });
+  const entries: Array<{ type?: string; customType?: string; data?: unknown }> = [];
+  for (const line of raw.split(/\r?\n/)) {
+    if (line.length > 0) {
+      entries.push(JSON.parse(line) as { type?: string; customType?: string; data?: unknown });
+    }
+  }
+  return entries;
 };
 
 const readSessionMessages = async (sessionFile: string) => {