diff --git a/codex-rs/core/tests/suite/prompt_caching.rs b/codex-rs/core/tests/suite/prompt_caching.rs
index 1bafe9ecc2..dddfd4af68 100644
--- a/codex-rs/core/tests/suite/prompt_caching.rs
+++ b/codex-rs/core/tests/suite/prompt_caching.rs
@@ -16,7 +16,6 @@ use codex_protocol::protocol::AskForApproval;
 use codex_protocol::protocol::ENVIRONMENT_CONTEXT_OPEN_TAG;
 use codex_protocol::protocol::EventMsg;
 use codex_protocol::protocol::Op;
-use codex_protocol::protocol::TurnEnvironmentSelection;
 use codex_protocol::user_input::UserInput;
 use core_test_support::TempDirExt;
 use core_test_support::responses::ev_completed;
@@ -769,10 +768,6 @@ async fn per_turn_overrides_keep_cached_prefix_and_key_constant() -> anyhow::Res
             additional_context: Default::default(),
             thread_settings: codex_protocol::protocol::ThreadSettingsOverrides {
                 cwd: Some(new_cwd.abs()),
-                environments: Some(vec![TurnEnvironmentSelection {
-                    environment_id: codex_exec_server::LOCAL_ENVIRONMENT_ID.to_string(),
-                    cwd: new_cwd.abs(),
-                }]),
                 approval_policy: Some(AskForApproval::Never),
                 sandbox_policy: Some(sandbox_policy),
                 permission_profile,
diff --git a/codex-rs/core/tests/suite/review.rs b/codex-rs/core/tests/suite/review.rs
index e2acdab6f3..5f07d0b39c 100644
--- a/codex-rs/core/tests/suite/review.rs
+++ b/codex-rs/core/tests/suite/review.rs
@@ -16,7 +16,6 @@ use codex_protocol::protocol::ReviewRequest;
 use codex_protocol::protocol::ReviewTarget;
 use codex_protocol::protocol::RolloutItem;
 use codex_protocol::protocol::RolloutLine;
-use codex_protocol::protocol::TurnEnvironmentSelection;
 use codex_protocol::user_input::UserInput;
 use core_test_support::PathBufExt;
 use core_test_support::responses;
@@ -823,10 +822,6 @@ async fn review_uses_overridden_cwd_for_base_branch_merge_base() {
         &codex,
         codex_protocol::protocol::ThreadSettingsOverrides {
             cwd: Some(repo_path.to_path_buf().abs()),
-            environments: Some(vec![TurnEnvironmentSelection {
-                environment_id: codex_exec_server::LOCAL_ENVIRONMENT_ID.to_string(),
-                cwd: repo_path.to_path_buf().abs(),
-            }]),
             ..Default::default()
         },
     )