diff --git a/codex-rs/app-server/tests/common/rollout.rs b/codex-rs/app-server/tests/common/rollout.rs
index 6b2a9a0abe..6d65bab04f 100644
--- a/codex-rs/app-server/tests/common/rollout.rs
+++ b/codex-rs/app-server/tests/common/rollout.rs
@@ -8,6 +8,7 @@ use codex_protocol::protocol::SessionSource;
 use codex_protocol::protocol::TokenCountEvent;
 use codex_protocol::protocol::TokenUsage;
 use codex_protocol::protocol::TokenUsageInfo;
+use core_test_support::test_path_buf;
 use serde_json::json;
 use std::fs;
 use std::fs::FileTimes;
@@ -134,7 +135,7 @@ pub fn create_fake_rollout_with_source(
         id: conversation_id,
         forked_from_id: None,
         timestamp: meta_rfc3339.to_string(),
-        cwd: PathBuf::from("/"),
+        cwd: test_path_buf("/"),
         originator: "codex".to_string(),
         cli_version: "0.0.0".to_string(),
         source,
@@ -218,7 +219,7 @@ pub fn create_fake_rollout_with_text_elements(
         id: conversation_id,
         forked_from_id: None,
         timestamp: meta_rfc3339.to_string(),
-        cwd: PathBuf::from("/"),
+        cwd: test_path_buf("/"),
         originator: "codex".to_string(),
         cli_version: "0.0.0".to_string(),
         source: SessionSource::Cli,
diff --git a/codex-rs/app-server/tests/suite/conversation_summary.rs b/codex-rs/app-server/tests/suite/conversation_summary.rs
index c06ff8599a..f8acc46bc5 100644
--- a/codex-rs/app-server/tests/suite/conversation_summary.rs
+++ b/codex-rs/app-server/tests/suite/conversation_summary.rs
@@ -2,6 +2,7 @@ use anyhow::Result;
 use app_test_support::McpProcess;
 use app_test_support::create_fake_rollout;
 use app_test_support::rollout_path;
+use app_test_support::test_path_buf;
 use app_test_support::to_response;
 use codex_app_server::in_process;
 use codex_app_server::in_process::InProcessStartArgs;
@@ -56,7 +57,7 @@ fn expected_summary(conversation_id: ThreadId, path: PathBuf) -> ConversationSum
         timestamp: Some(CREATED_AT_RFC3339.to_string()),
         updated_at: Some(UPDATED_AT_RFC3339.to_string()),
         model_provider: MODEL_PROVIDER.to_string(),
-        cwd: PathBuf::from("/"),
+        cwd: test_path_buf("/"),
         cli_version: "0.0.0".to_string(),
         source: SessionSource::Cli,
         git_info: None,